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1
Drywall and Veneer
Plaster Products
2
Since their introduction over 60 years ago, SHEETROCK Brand Gypsum
Panels from CGC have dominated the drywall industry and have
become the standard for quality interior walls and ceilings. With the
addition of veneer plaster bases and finishes, CGC has the nation鈥檚
largest-selling, broadest line of gypsum products with the highest qual-
ity and the best performance.
The gypsum products described in this chapter conform to product
standards recommended by CGC and most applicable ASTM, govern-
ment and commercial standards. These materials meet the essential
requirements of economy, sound isolation, workability, strength, fire
resistance and ease of decoration which are characteristic of quality
construction.
CGC continues to be at the forefront of technological advances in the
industry. In recent years, the company鈥檚 research and development
staff has produced a series of materials that offer exceptional strength
and durability. Those materials now are commercially available as
abuse-resistant products and systems. These systems were initially
developed for government buildings, commercial construction,
schools, prisons and other structures where walls and ceilings are sub-
ject to exceptional traffic, and abusive wear and tear. They now also
provide longer lasting quality in typical commercial and residential con-
struction. You will find information on abuse-resistant products and
systems throughout this text.
Our sales and technical representatives are ready to consult with
tradespeople, contractors, architects, dealers and code officials on gyp-
sum products and systems, and their application to individual job
problems and conditions. For more in-depth information, contact your
nearest CGC sales office or our website (http://www.cgcinc.com).
Gypsum Panel Products
SHEETROCK Brand continues to be the preferred and most widely used
brand of gypsum panels in existence. These panels are available in
more specialized forms than any other gypsum panel line. The high
quality standards extend to other CGC components, designed to pro-
vide high-performance walls and ceilings. Thus, one dependable
source of supply offers unit responsibility for the system used.
The SHEETROCK Brand Panel is a factory-produced panel composed of a
noncombustible gypsum core encased in a strong, smooth-finish paper
on the face side and a natural-finish paper on the back side. The face
paper is folded around the long edges to reinforce and protect the core,
and the ends are square-cut and finished smooth. Long edges of pan-
els have a choice of edge designs (including tapered), allowing joints to
be reinforced and concealed with a CGC joint treatment system.
Advantages Interior walls and ceilings built with SHEETROCK Brand Panels have a
durable surface suitable for most types of decorative treatment and for
redecoration during the life of the building.
3
Products
Dry Construction Factory-produced panels do not contribute moisture
1
during construction. The joint finishing system contributes very little.
Fire Protection The gypsum core will not support combustion or transmit
temperatures greatly in excess of 100掳C (212掳F) until completely calcined
(the water is chemically driven off). Fire-resistance ratings of up to 4 hours
for partitions, 3 hours for floor-ceilings and 4 hours for column and shaft
fire resistant assemblies are available with specific assemblies. (See
Chapter 10 for specific ratings and related assemblies.)
Sound Control SHEETROCK Brand Gypsum Panels are a vital component
in sound-resistive partition and floor-ceiling systems. (See Chapter 10 and
appendix for specific rating data.)
Low In-place Cost The easily cut gypsum panels install quickly.
Fixture attachment and installation of electrical and mechanical ser-
vices are simplified.
Dimensional Stability Expansion or contraction under normal tem-
perature and humidity changes is small and normally will not result in
warping or buckling. With joints properly reinforced, SHEETROCK Brand
Panels are exceptionally resistant to cracking caused by internal or
external forces. (See Appendix for thermal and hygrometric coefficients
of expansion.)
Availability CGC (and USG) manufacturing plants produce gypsum
board and related products described herein throughout North
America. Special warehouse facilities, in addition to these plants,
increase total distribution and service efficiency to major markets and
rural areas from coast to coast. All standard gypsum board products
are readily available upon short notice.
Gypsum Panel 1. Exposure to excessive or continuous moisture and extreme temperatures
Limitations should be avoided. Not recommended for use in solar or other heating
systems when board will be in direct contact with surfaces exceeding
52掳C (125掳F).
2. Must be adequately protected against wetting if used as a base for
ceramic or other wall tile (see foil-back panel limitation, page 6).
DUROCK Brand Cement Board is recommended for partitions in
moisture-prone areas.
3. Maximum spacing of framing members: 12.7 mm (1/2 ) and 15.9 mm
(5/8 ) gypsum panels are designed for use on framing centers up to
600 mm (24 ); 9.5 mm (3/8 ) panels are designed for use on framing
centers up to 400 mm (16 ). In both walls and ceilings, when 12.7 mm
(1/2 ) or 15.9 mm (5/8 ) gypsum panels are applied across framing on
600 mm (24 ) centers and joints are reinforced, blocking is not
required. 6.4 mm (1/4 ) SHEETROCK Brand Panels are not recommended
for single-layer applications on open framing.
4. Application of SHEETROCK Brand Panels over 19 mm (3/4 ) wood furring
applied across framing is not recommended since the flexibility of the
furring under impact of the hammer tends to loosen nails already
driven. Furring should be nom. 38 x 38 mm (2 x 2 ) minimum (may
be nom. 19 x 64 mm (1 x 3 ) if panels are to be screw-attached).
4
5. The application of gypsum panels over an insulating blanket that has
first been installed continuously across the face of the framing mem-
bers, is not recommended. Blankets should be recessed and flanges
attached to sides of studs or joists.
6. To prevent objectionable sag in new gypsum panel ceilings, the weight of
overlaid unsupported insulation should not exceed: 6.3 kg/m2 (1.3 psf)
for 12.7 mm (1/2 ) thick panels with frame spacing 600 mm (24 ) o.c.;
11.7 kg/m2 (2.4 psf) for 12.7 mm (1/2 ) panels on 400 mm (16 ) o.c.
framing (or 12.7 mm (1/2 ) SHEETROCK Brand Interior Ceiling Board,
Sag-Resistant on 600 mm (24 ) o.c. framing); 10.7 kg/m2
(2.2 psf) for 15.9 mm (5/8 ) panels on 600 mm (24 ) o.c. framing.
9.5 mm (3/8 ) thick panels must not be overlaid with unsupported
insulation. A vapour retarder should be installed in all exterior ceilings,
and the plenum or attic space should be properly vented.
During periods of cold or damp weather, where a polyethylene or
equivalent vapour retarder is installed on ceilings behind the gypsum
board, it is important to install the ceiling insulation before or immedi-
ately after installing the ceiling board. Failure to follow this procedure
may result in condensation forming on the back side of the gypsum
board, causing the board to sag.
Water-based textures, interior finishing materials and high ambient
humidity conditions can produce sag in gypsum ceiling panels, if ade-
quate vapour and moisture control is not provided. The following pre-
cautions must be observed to minimize sagging of ceiling panels:
a) Where vapour retarder is required in cold weather conditions, care
must be taken to avoid condensation. The temperature of the gypsum
ceiling panels and vapour retarder must remain above the interior air dew
point temperature during and after the installation of panels and
finishing materials.
b) The interior space must be adequately ventilated and air circulation
must be provided to remove water vapour from the structure.
Most sag problems are caused by the condensation of water within the
gypsum panel. The placement of vapour retarders, insulation levels and
ventilation requirements will vary by location and climate and should
be reviewed by a qualified engineer if in question.
7. To produce final intended results, certain recommendations regarding
surface preparation, and painting products and systems must be
adhered to for satisfactory performance.
8. Precaution should be taken against creating a double vapour retarder
by using gypsum panels as a base for highly water vapour-resistant
coverings when the wall already contains a vapour retarder. Moreover,
do not create a vapour retarder by such wall coverings on the interior
side of exterior walls of air-conditioned buildings in hot-humid climates
where conditions dictate a vapour retarder location near the exterior
side of the wall. Such conditions require assessment by a qualified
mechanical engineer.
5
Products
Products Available 1
SHEETROCK Brand Gypsum Panels, Regular Have long edges tapered
on the face side to form a shallow recess (nom. 1.3 mm (0.050 ) deep)
to accommodate joint reinforcement. Made in three thicknesses for
specific purposes:
鈥? 12.7 mm (1/2 ), recommended for the finest single-layer construction
in typical new construction and remodeling. The greater thickness
provides increased resistance to fire exposure, transmission of sound,
and sagging.
鈥? 9.5 mm (3/8 ), lightweight, applied principally in repair and remodel
work over existing surfaces.
鈥? 6.4 mm (1/4 ), lightweight, low-cost, utility gypsum panel, used as a
base layer for improving sound control in multilayer partitions and in
covering old wall and ceiling surfaces. Also used for forming curved
surfaces with short radii.
SHEETROCK Brand 54 Gypsum Panels Same as 12.7 mm (1/2 )
regular core SHEETROCK Brand Gypsum Panels, but 152 mm (6 ) wider.
Conventional
The added width reduces cutting, waste, joint finishing and labor costs
for walls that are 2590 mm (8 6 ) or 2743 mm (9 ) tall.
SHEETROCK Brand Gypsum Panels, SW Have an exclusive tapered
rounded edge design to help minimize ridging or beading and other joint
imperfections. This edge produces a much stronger joint than regular
tapered edge when pre-filled with DURABOND setting type compound and
SW finished with joint treatment. Except for the rounded edge, panels are
tapered like, and otherwise identical to, regular tapered-edge gypsum
Types of Tapered Edges
panels. Made in 15.9 mm (5/8 ) and 12.7 mm (1/2 ) thicknesses. Panels
are available in regular or FIRECODE Core (Type X and Type C) formulations.
SHEETROCK Brand Gypsum Panels, FIRECODE Core 15.9 mm (5/8 )
thick, combine all the advantages of regular panels with additional fire
resistance鈥攖he result of a specially formulated core containing spe-
cial additives that enhance the integrity of the core under fire exposure.
Panels comply with ASTM requirements for Type X gypsum board.
SHEETROCK Brand Gypsum Panels, FIRECODE C Core Available in 12.7 mm
(1/2 ) and 15.9 mm (5/8 ) thicknesses. Improved formulation exceeds
ASTM requirements for Type X gypsum board. Based on tests at
Underwriters Laboratories of Canada, Underwriters Laboratories Inc. and
other nationally recognized testing agencies, certain partition, floor-ceiling,
and column fire-protective assemblies using these special products provide
1-hr. to 4-hr. fire-resistance ratings.
In order to attain fire-resistance ratings, the construction of all such
assemblies must be consistent with the assembly tested.
SHEETROCK Brand 6.4 mm (1/4 ) Flexible Gypsum Panels Designed
specifically for curved partitions, these panels are more flexible than
standard SHEETROCK Brand Panels of the same thickness, making them ideal
for use anywhere a tight radius is required for curved walls, arches and
stairways. (See curved surface section, Chapter 3.)They make construction
of curved surfaces easy and fast. Double-layer installation improves surface
smoothness and fire protection. Meet ASTM C36 and C1396.
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SHEETROCK Brand Gypsum Panels, ULTRACODE Core 19.1 mm (3/4 )
thick, UL tested to provide a 2-hr. fire rating with single-layer construc-
tion and a 4-hr. fire rating with double-layer construction in certain spec-
ified systems (steel studs only). Because fewer layers are needed to meet
fire ratings, ULTRACODE Core panel systems reduce labor material costs.
Gypsum Panels, SHEETROCK Brand Gypsum Panels, Foil-Back, are made by laminating
Foil-Back special kraft-backed aluminum foil to the back surface of regular, SW,
FIRECODE or FIRECODE C Panels. Forms an effective vapour retarder where
required in cold climates; for walls and ceilings when applied with foil
surface next to framing on interior side of exterior wall in single-layer
application; or as the base layer in multi-layer systems. Foil-Back
Gypsum Panels provide a water vapour retarder to help prevent interior
moisture from entering wall and ceiling spaces. In tests per ASTM E96
(desiccant method), 12.7 mm (1/2 ) foil-back panels showed a vapour
permeability of 3.5 ng/(Pa鈥鈥2) (0.06 perms). The permeance of the
total exterior wall is dependent on the closure of leaks with sealants at
periphery and penetrations such as outlet boxes.
These panels are designed for use with furred masonry, or wood or
steel framing. Thickness: 15.9 mm (5/8 ), 12.7 mm (1/2 ) and 9.5 mm
(3/8 ). Sizes, edges and finish: same as for base panels.
Foil-Back Panel 1. Not recommended as a base for ceramic or other tile or as base layer
Limitations for SHEETROCK Brand TEXTONE Vinyl-Faced Gypsum Panels in double-layer
assemblies.
2. Not to be used in air conditioned buildings in climates having sustained
high outside temperature and humidity, such as the Southern Atlantic
and Gulf Coast areas. Under these conditions, a qualified mechanical
engineer should determine vapour retarder location.
Foil-Back Panels applied
to steel framing over the
interior of exterior walls
provide effective vapour
retarder.
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Products
1
Gypsum Panels, A proven water-resistant base for the adhesive application of ceramic
Water Resistant and plastic tile and plastic-faced wall panels. Made water-resistant all
the way through. The multilayered face and back paper are chemically
treated to combat penetration of moisture. The gypsum core is made
water-resistant with a special moisture-resistant composition. The
panels are easily recognized because of their distinctive green faces.
These panels are designed for bathrooms, powder rooms, kitchens and
utility rooms. In addition, they may be used in modernization work
when the existing surfaces are removed and Water Resistant Panels
are applied directly to framing. SHEETROCK Brand Gypsum Panels,
Water-Resistant, FIRECODE and FIRECODE C Core Panels also are used in
fire-rated assemblies that may be exposed to moisture during
construction. Panels comply with ASTM C630 and C1396.
Available in five product types:
SHEETROCK Brand Gypsum Panels, Water-Resistant, Regular
12.7 mm (1/2 ) thickness for single-layer application in residential
construction; 15.9 mm (5/8 ) thickness is also available on special request.
SHEETROCK Brand Gypsum Panels, Water-Resistant, FIRECODE and
FIRECODE C Core in 12.7 mm (1/2 ) and 15.9 mm (5/8 ) thickness with
special core to provide fire resistance for required ratings.
SHEETROCK Brand HUMITEK Interior Panels. A fire resistant gypsum board
12.7 mm (1/2 ) thick with a water and mould-resistant gypsum core
encased in specially treated water repellent paper on both sides and along
the edges. Its mould resistant core provides the best protection against
mould available in faced gypsum based products.
SHEETROCK Brand HUMITEK FIRECODE Core (Type X) Interior Panels
15.9 mm (5/8 ) thickness with Type X core to provide fire resistance
for required ratings.
Because HUMITEK Panels are new please see current literature for the
latest information about uses and applications.
FIBEROCK Brand AQUA-TOUGH Interior Panels Finishing flexibility and
superior water resistance in a single panel. Manufactured using CGC鈥檚
unique gypsum-fiber technology, these durable panels provide water
resistance superior to conventional drywall, but can be installed and
finished using basic drywall techniques. Uniform composition, without
face paper, is based on a uniquely engineered gypsum/cellulose-fiber
combination that won鈥檛 weaken if the surface is penetrated by mois-
ture. Panels comply with ASTM C1278, and meet or exceed the
requirements of C79 and C630.
Because FIBEROCK AQUA-TOUGH Interior is a new product, see the current
literature for the latest information about uses and application.
Water-Resistant 1. Adherence to recommendations concerning sealing exposed edges,
Panel Limitations painting, tile adhesives, framing and installation is necessary for satis-
factory performance.
2. Not recommended for ceilings with framing spacing greater than 300 mm
(12 ) o.c. for 12.7 mm (1/2 ) board or 400 mm (16 ) o.c. for 15.9 mm
(5/8 ) board, or for single-layer resilient attachment where tile is to be
applied or in remodeling unless applied directly to studs.
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3. Panels that would normally receive an impervious finish, such as
ceramic tile, should not be installed over a vapour retarder nor on a
wall acting as a vapour retarder.
4. Store in an enclosed shelter and protect from exposure to the elements.
5. Panels are not intended for use in areas subject to constant moisture,
such as interior swimming pools, gang showers and commercial food
processing areas鈥擠UROCK Brand Cement Board is recommended for
these uses. (See DUROCK applications, Chapter 4.)
Exterior Gypsum SHEETROCK Brand Exterior Gypsum Ceiling Board, Sag-resistant,
Ceiling Board Weather-resistant board designed for use on the soffit side of eaves,
canopies and carports and other commercial and residential exterior
applications with indirect exposure to the weather. Noncombustible
core is simply scored and snapped for quick application. Panels can be
painted and provide good sag resistance.
Installed conventionally in wood and metal-framed soffits; batten strips
or mouldings can be used over butt joints or joints can be treated;
backing strips are required for small vent openings. Natural finish.
Available in 12.7 mm (1/2 ) thickness with regular core and in 15.9 mm
(5/8 ) thickness with fire-rated core鈥攂oth with eased edges. Board
complies with ASTM C931 and C1396.
Sag-Resistant SHEETROCK Brand Interior Ceiling Board, Sag-Resistant
Ceiling Panels Significantly lighter in weight than 15.9 mm (5/8 ) gypsum panels (also
lighter than standard 12.7 mm (1/2 ) panels) and provide greater sag
resistance. These panels also support sprayed textures and overlaid insu-
lation better than 15.9 mm (5/8 ) gypsum panels. Panels are 12.7 mm
(1/2 ) thick and are available in 2440 mm (8 ) or 3660 mm (12 ) lengths,
1220 mm (4 ) wide. Meet ASTM C1395 and C1396.
Abuse-Resistant SHEETROCK Brand Abuse-Resistant Panels Offer greater indentation
Panel Products and through-penetration resistance than standard gypsum panels.
Available in 12.7 mm (1/2 ) FIRECODE C core or 15.9 mm (5/8 ) FIRECODE
Core. Abuse-resistant panels are made with strong face paper and a
heavy-duty backing sheet, which improves the integrity of the board.
As a result, the panels are able to withstand impact better than stan-
dard gypsum board and are less likely to allow penetrations or show
indentations. Meets ASTM C36 and C1396.
FIBEROCK Brand Panels Deliver greater impact and puncture resistance
that any other gypsum panel. Made with a unique gypsum/cellulose
fiber core, the panels impede penetrations by sharp objects, including
sharp blows from small objects, and exhibit more rigidity than standard
gypsum panels. They also provide greater flexural strength and screw
withdrawal properties than other gypsum panels. The 15.9 mm (5/8 )
panels comply with ASTM C1278 for Type X gypsum board. See the
current literature for the latest application information.
FIBEROCK Brand VHI Panels Are glass fiber mesh reinforced to provide
extraordinary penetration resistance and rigidity for a single-layer gypsum
panel. Available in 12.7 mm (1/2 ) and 15.9 mm (5/8 ) thicknesses. See
the current literature for the latest application information.
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Products
Specifications鈥擥ypsum Panel Products
1
Thickness Length Approx. wt.
mm in. mm(1) kg/m2 lb./ft.2
SHEETROCK Brand 6.4 1/4 2440 and 3050 5.9 1.2
Regular Panels(2) 9.5 3/8 2440, 2745, 3050, 3660, 4270 6.8 1.4
12.7 1/2 2440, 2745, 3050, 3660, 4270 8.3 1.7
FIRECODE Core Panels(2) 15.9 5/8 2440, 2745, 3050, 3660, 4270 10.7 2.2
FIRECODE C Core Panels(2) 12.7 1/2 2440, 2745, 3050, 3660, 4270 9.3 1.9
15.9 5/8 2440, 2745, 3050, 3660, 4270 12.2 2.5
ULTRACODE Core Panels 19.1 3/4 2440, 2745, 3050, 3660 13.7 2.8
Water-Resistant Panels 12.7 1/2 2440, 3050, 3660 8.8 1.8
15.9 5/8 2440, 3050, 3660 10.7 2.2
HUMITEK Interior Panels 12.7 1/2 2440, 3050, 3660 9.6 1.9
HUMITEK FIRECODE Interior Panels 15.9 5/8 2440, 3050, 3660 11.7 2.4
Water-Resistant FIRECODE 15.9 5/8 2440, 3050, 3660 12.2 2.5
and FIRECODE C Core Panels
Water-Resistant FIRECODE 12.7 1/2 3050 9.3 1.9
C Core Panels
FIBEROCK Brand AQUA-TOUGH 12.7 1/2 1525, 2440, 2745, 3050 10.7 2.2
Interior Panels 15.9 5/8 1525, 2440, 2745, 3050 13.2 2.7
Exterior Ceiling Board 12.7 1/2 2440, 3660 9.3 1.9
Regular Board 15.9 5/8 2440, 3660 11.7 2.4
FIRECODE Board 15.9 5/8 2440, 3660 11.7 2.4
Interior Ceiling Board 12.7 1/2 2440, 3660, 4270 7.8 1.6
Sag Resistant
1/4 Flexible Panels 6.4 1/4 2440 and 3050 5.9 1.2
54 Panels 12.7 1/2 2440, 2745, 3050, 3660, 4270 8.3 1.7
Abuse Resistant Panels 12.7 1/2 2440, 2745, 3050, 3660 10.7 2.2
15.9 5/8 2440, 2745, 3050, 3660, 4270 13.2 2.7
FIBEROCK Brand Panels 12.7 1/2 2440, 2745, 3050 10.7 2.2
15.9 5/8 2440, 2745, 3050 13.2 2.7
FIBEROCK Brand VHI Panels 15.9 5/8 2440, 2745, 3050 13.2 2.7
(1) Imperial lengths: 2440 mm = 8 ft.; 2745 mm = 9 ft.; 3050 mm = 10 ft.; 3660 mm = 12ft.; 4270 mm = 14ft.
(2) Also available in Foil-Back Panels. NOTE: See page 13 for information on gypsum bases.
Veneer Plaster Gypsum Base Products
Gypsum Bases finished with veneer plasters are recommended for
interior walls and ceilings in all types of construction. For these interiors,
a veneer of specially formulated gypsum plaster is applied in one coat
(1.6 - 2.4 mm (1/16 to 3/32 ) thick) or two coats (approximately 3 mm
(1/8 ) thick) over the base. The resulting smooth or textured monolithic
surfaces are preferred for hard-wear locations where durability and
resistance to abrasion are required.
Tapered
GRAND PRIX Brand Veneer Plaster Bases are large-size gypsum board panels
Type of Edge
(1220 mm (4-ft.) width) that are rigid and fire-resistant. A gypsum core is
faced with specially treated, multilayered paper (blue) designed to provide
a maximum bond to veneer plaster finishes. The paper鈥檚 absorbent outer
layers quickly and uniformly draw moisture from the veneer plaster finish
for proper application and finishing; the moisture-resistant inner layers
keep the core dry and rigid to resist sagging. The face paper is folded
around the long edges. Ends are square-cut and finished smooth.
10
Gypsum Base Gypsum bases, in conjunction with selected veneer plaster finishes provide
Advantages the lasting beauty of plaster walls and ceilings at a lower cost and with
less weight and residual moisture than conventional plaster.
Rapid Installation Construction schedules are shortened. Walls and
ceilings can be completed in 3 to 4 days, from bare framing through
decorated interiors.
Fire Resistance Ratings of up to 4 hours for partitions, 3 hours for
floor-ceilings and 4 hours for column fire protection assemblies have
been obtained.
Sound Control Gypsum base partitions faced with veneer plaster fin-
ishes on both sides have high resistance to sound transmission.
Resilient attachment of base and use of THERMAFIBER SAFB Insulation
further improve sound isolation.
Durability Hard, high-strength surfaces provide excellent abrasion resis-
tance, resulting in minimum maintenance, even in high-traffic areas.
Easily Decorated Smooth-surfaced interiors readily accept paints,
texture, fabric and wallpaper. Veneer plaster finishes also may be tex-
tured. If completely dry, finishes can be painted with breather-type
paints the day following application.
Gypsum Base 1. Maximum frame and fastener spacing is dependent on thickness and
Limitations type of base used.
2. Recommended for use with IMPERIAL Brand Basecoat Plaster, IMPERIAL
Brand Finish Plaster, DIAMOND Brand Veneer Basecoat Plaster and
DIAMOND Brand Interior Finish Plaster. Do not apply gauged lime-putty
finishes or portland cement plaster directly to base; bond failure is likely.
3. Not recommended for use in areas exposed to excessive moisture for
extended periods or as a base for adhesive application of ceramic tile
in wet areas (DUROCK Brand Interior Cement Board is recommended for
this use).
4. Gypsum base that has faded from the original light blue color, due to
exposure to sunlight, should be treated with either CGC Plaster Bonder
or a solution of CGC Accelerator鈥擜lum Catalyst before DIAMOND Brand
Interior Finish Plaster or any veneer plaster finish containing lime is
applied. IMPERIAL Brand Basecoat and Finish Plaster, or DIAMOND Brand
Basecoat Plasters, do not contain lime and are not susceptible to bond
failure over faded base.
5. Joints and internal angles must be treated with CGC Brand Joint Tape
and DURABOND Setting-Type Joint Compound or SHEETROCK Lightweight
Setting-Type Joint Compound when building temperature-humidity
conditions fall in the 鈥渞apid-drying鈥? area of the graph, or when metal
framing is specified, or when 600 mm (24 ) o.c. wood-frame spacing
and a single layer gypsum base veneer system is specified (15.9 mm
(5/8 ) base with one-coat veneer finish and 12.7 mm (1/2 ) or
15.9 mm (5/8 ) base with two-coat veneer finish). Single layer
12.7 mm (1/2 ) base is not recommended with 600 mm (24 ) o.c.
spacing and one-coat veneer plaster.
11
Products
1
Plaster Drying 90%
Conditions
80%
minimum temp.
for plastering
70%
normal drying
60%
Relative Humidity
50%
no air movement
40%
detectable air
movement
30%
20%
rapid drying
10%
掳C 4 10 16 21 27 32 38 43
掳F 40 50 60 70 80 90 100 110
Temperature
Products GRAND PRIX Brand Veneer Plaster Base A special gypsum board that has
Available been specifically engineered for use with IMPERIAL Brand Finish Plaster and
DIAMOND Brand Interior Finish Plaster, or IMPERIAL Brand and DIAMOND Brand
Basecoat Plasters. It provides the strength and absorption characteristics
necessary for top-quality veneer plaster finishing performance. Large
sheets minimize the number of joints and speed installation. The
high-density, fire-resistant gypsum core has a superior controlled-absorp-
tion paper lightly tinted blue on the face side and a strong liner paper on
the back side. Available in two thicknesses with tapered edges: 12.7 mm
(1/2 ) for single-layer application in new light construction; 15.9 mm
(5/8 ) recommended for the finest high-strength veneer plaster finish
construction. The greater thickness provides increased resistance to fire
exposure and sound transmission and allows 600 mm (24 ) o.c. spacing
of wood framing. GRAND PRIX Brand Veneer Plaster Base may be used with
Diamond Brand Interior Finish Plaster to embed cables for radiant heat
ceilings. Meets ASTM C588 and C1396.
GRAND PRIX Brand Veneer Plaster Base, FIRECODE and FIRECODE C CORE
GRAND PRIX Brand Veneer Plaster Base, FIRECODE Core, in 15.9 mm (5/8 )
thickness, and FIRECODE C Core in 12.7 mm (1/2 ) and 15.9 mm (5/8 )
thicknesses, combine all the advantages of Regular GRAND PRIX Brand
Veneer Plaster Base with additional resistance to fire exposure鈥攖he
result of specially formulated mineral cores. ULC listed and UL
Classified for fire resistance. Meets ASTM C588 and C1396.
12
GRAND PRIX Brand Veneer Plaster Base, ULTRACODE Core GRAND PRIX
Brand Veneer Plaster Base, ULTRACODE Core in 19.1 mm (3/4 )
thickness, has a fire-resistant core that permits fire ratings to be
achieved with fewer layers of panels. Meets ASTM C588 and C1396.
GRAND PRIX Brand Abuse-Resistant (AR) Veneer Plaster Base offers
greater indentation and through-penetration resistance than standard
gypsum panels. Available in 12.7 mm (1/2 ) FIRECODE C core or 15.9 mm
(5/8 ) FIRECODE Core.
Abuse-resistant panels are made with strong face paper and a heavy-
duty backing sheet, which improves the integrity of the board. As a
result, the panel is able to withstand impact better than standard
Veneer Plaster Base and is less likely to allow penetrations. Meets
ASTM C588 and C1396.
Foil-Back GRAND PRIX Brand Veneer Plaster Base Bright aluminum foil
laminated to the back side acts as a vapour retarder. Available in Regular,
FIRECODE and FIRECODE C Bases. Not available in all geographical areas.
Foil-Back Base Limitation: Do not use as a base for ceramic or other
tile or as a face layer in multilayer systems.
Other Veneer DUROCK Brand Cement Board A glass fiber-mesh reinforced aggre-
Plaster Base gated portland cement panel that provides a high-strength substrate
Products for improved abuse-resistance. Requires the use of CGC Plaster
Bonder. Available 12.7 mm (1/2 ) thick (15.9 mm (5/8 ) available
under minimum order conditions) in 1220 x 2440 mm (4 x 8 ) and
1220 x 3050 mm (4 x 10 ) dimensions.
FIBEROCK Brand Abuse Resistant Panels and FIBEROCK Brand VHI
Panels Provide improved indentation and penetration resistance.
These panels deliver greater impact and puncture resistance than any
other gypsum panel. Made with a unique gypsum/ cellulose fiber core,
the panels impede penetrations by sharp objects, including sharp
blows from small objects, and exhibit more rigidity than standard gyp-
sum panels. They also provide greater flexural strength and screw
withdrawal properties than other gypsum panels. The 15.9 mm (5/8 )
panels comply with ASTM C1278 for Type X gypsum board. Requires
the use of CGC Plaster Bonder. VHI Panels are glass fiber mesh
reinforced to provide extraordinary penetration resistance and rigidity
for a single-layer gypsum panel; available in 12.7 mm (1/2 ) and
15.9 mm (5/8 ) thicknesses. See the current literature for the latest
application information.
13
Products
Specifications鈥擥ypsum Bases
1
Thickness Length Approx. wt.
Product mm in. mm(1) kg/m2 lb./ft.2
GRAND PRIX Brand Veneer Plaster Base(2)
Regular 12.7 1/2 2440, 2745, 3050, 3660, 4270 8.8 1.8
FIRECODE 15.9 5/8 2440, 2745, 3050, 3660, 4270 11.2 2.3
FIRECODE C 12.7 1/2 2440, 2745, 3050, 3660, 4270 9.8 2.0
FIRECODE C 15.9 5/8 2440, 2745, 3050, 3660, 4270 12.2 2.5
ULTRACODE 19.1 3/4 2440, 2745, 3050, 3660, 4270 14.6 3.0
Abuse-Resistant FIRECODE C 12.7 1/2 2440, 2745, 3050, 3660, 4270 9.8 2.0
Abuse-Resistant FIRECODE 15.9 5/8 2440, 2745, 3050, 3660, 4270 12.2 2.5
DUROCK Brand Cement Board 12.7 1/2 1525, 2440 14.6 3.0
FIBEROCK Brand 12.7 1/2 2440, 2745, 3050 10.9 2.2
AR Panels 15.9 5/8 2440, 2745, 3050 13.4 2.7
FIBEROCK Brand VHI 15.9 5/8 2440, 2745, 3050 13.4 2.7
Panels
(1) Imperial lengths: 2440 mm = 8 ft.; 2745 mm = 9 ft.; 3050 mm = 10 ft.; 3660 mm = 12ft.; 4270 mm = 14ft.
(2) Also available in Foil-Back Base.
Gypsum Liner and Sheathing Products
SHEETROCK Brand Gypsum Liner Panels A 25.4 mm (1 ) thick, special
fire-resistant gypsum core encased in multilayered, moisture-resistant
green paper. Panels are used in CGC Cavity Shaft Walls, CGC Area
Separation Walls, select floor assemblies and infill panel systems for
exterior curtain walls. Panels have beveled edges for easy insertion
between the supporting flanges of steel C-H studs, E-studs or H-studs.
Meets ASTM C442 and C1396.
Double Beveled
SHEETROCK Brand HUMITEK Gypsum Liner Panels A 25 mm (1 ) thick fire
resistant gypsum core enhanced with water, mould and mildew resistant
properties encased in multilayered, moisture resistant blue paper. Panels
are used similarly to regular Liner panels but where added moisture,
mould and mildew resistance is required. Because SHEETROCK Brand
Gypsum Liner Panels are new please consult current literature for latest
information about uses and applications.
Square
SHEETROCK Brand HUMITEK Exterior Panels A fire-resistant gypsum
Types of Edges
board, 12.7 mm (1/2 ) thick, with a water and mould resistant gypsum
core encased in specially treated water-repellent paper on both sides
and long edges. Its weather resistance, mould and mildew resistance,
water repellency, fire resistance and low applied cost make it suitable
for use in exterior wall construction of garden apartments and light
commercial buildings as well as in homes. Also used in steel stud
curtain wall construction. Its mould resistant gypsum core provides the
best protection against mould available in faced gypsum based products.
SHEETROCK Brand HUMITEK Exterior Panels are suitable for a wide range of
exterior finishes such as, but not limited to, masonry veneer, wood, vinyl and
aluminum siding, wood shingles and stucco鈥攅xterior finish attachment is
limited to mechanical fastening through sheathing into the framing.
Because HUMITEK Panels are new please see current literature for the
latest information about uses and application.
14
FIBEROCK Brand Sheathing with AQUA-TOUGH New sheathing product
manufactured using CGC鈥檚 unique gypsum-fiber technology. FIBEROCK
Brand Sheathing panels outperform paper- or glass-mat-faced gyp-
sum sheathing. They are strong, water-durable and provide a unique
water-drainage capability. FIBEROCK Brand Sheathing has a unique engi-
neered drainage design on its back surface to aid in removing water
that has entered the system. Since the panels have no face paper or
mesh, they serve as an effective substrate for expanded polystyrene
(EPS) insulation board that is adhesively attached to them.
Meets ASTM C1278, and meets or exceeds the properties of C79 and
C1177. Available 12.7 mm (1/2 ) and 15.9 mm (5/8 ) thick, in 815 mm
(32 ) and 1220 mm (48 ) widths and in 2440 mm (8 ) length. They have
square edges and weigh approximately 10.7 kg/m2 (2.2 psf) for 12.7 mm
(1/2 ) thickness, 14.6 kg/m2 (3.0 psf) for 15.9 mm (5/8 ). See the current
literature for the latest application information. Because FIBEROCK is a new
product please refer to current literature for the latest information on
installation and uses.
GYP-LAP Gypsum Sheathing Treated Core A low-cost, weather and
fire-resistant board designed to combine excellent performance and
economy. Noncombustible gypsum core adds fire safety not available
with plywood or wood fiber sheathing. Clad in water-repellent paper on
face and back surfaces, with a water resistant core. Lightweight and
easily handled by one worker. Panels are 1220 mm (4 ) wide,
2440 mm (8 ) long with square edges. Thickness is 12.7 mm (1/2 );
Type X core available in 15.9 mm (5/8 ) thickness. Meets ASTM C79
and C1396.
GYPLAP Sheathing 1. Sheathing may be stored outside for up to one month, but must be
Limitations stored off the ground and must have a protective covering.
2. Maximum stud spacing is 600 mm (24 ) o.c.
3. When applied to a structure, sheathing must not be left exposed to the
elements for more than one month unless the procedure as outlined in
limitation 5 (below) is followed.
4. Exterior finish systems applied over gypsum paper-faced sheathing
must be applied with mechanical fasteners through the sheathing into
the wall framing. Alternate methods of application are not endorsed
and their performance and that of the substrate are solely the respon-
sibility of the specifier. Direct application of paint, texture finishes and
coatings over gypsum sheathing is not recommended.
15
Products
5. For in-place exposure up to six months, all gaps resulting from cuts,
1
corners, joints and machine end cuts of the sheathing should be filled
with exterior caulk at time of erection, or covered with a suitable water
barrier.
6. For curtain wall construction, cover the sheathing with No. 15 asphalt felt
or other suitable water barrier within 30 days of sheathing installation.
Felt should be applied horizontally with 50 mm (2 ) overlap and immedi-
ately anchored with metal lath, masonry ties or corrosion-resistant
screws or staples.
7. Sheathing is not recommended for exterior ceilings and soffits, unless
covered with metal lath and exterior portland cement stucco.
8. System should be designed to allow free movement of water out of the
system where the sheathing is installed to allow it to dry.
Specifications鈥擫iner and Sheathing Products
Thickness Width Length Approx.wt.
Product mm in. mm in. Edges mm(1) kg/m2 lb./ft.2
SHEETROCK Brand Liner Panels 25.4 1 600 24 Bevel up to 4877 20.0 4.1
SHEETROCK Brand HUMITEK 25.4 1 600 24 Bevel up to 4877 20.0 4.1
Liner Panels
GYPLAP Brand Sheathing 12.7 1/2 1220 48 Square 2440, 2745 9.8 2.0
Treated Core 15.9 5/8 1220 48 Square 2440, 2745 11.7 2.4
HUMITEK Exterior Panels 12.7 1/2 1220 48 Square 2440, 2745 9.6 1.9
HUMITEK FIRECODE Exterior Panels 15.9 5/8 1220 48 Square 2440, 2745 11.7 2.4
SHEETROCK Brand FIRECODE 15.9 5/8 1220 48 Square 2440, 2745 11.7 2.4
Sheathing
FIBEROCK Brand Sheathing 12.7 1/2 1220 48 Square 2440 10.7 2.2
AQUA-TOUGH 15.9 5/8 1220 48 Square 2440 13.2 3.0
(1) Imperial lengths: 2440 mm = 8 ft.; 2745 mm = 9 ft.; 3050 mm = 10 ft.; 3660 mm = 12ft.; 4270 mm = 14ft.; 4877 mm = 16ft.
Predecorated Panel Products
SHEETROCK Brand TEXTONE Vinyl-Faced Gypsum Panels Conventional
gypsum board with factory-applied vinyl facings in a wide range of
coordinated decorator colors. The facings provide a broad choice of
color, texture and pattern for mix-and-match versatility. The tough vinyl
covering is durable and easily cleaned. Panels have beveled long
edges which form a shallow V-groove joint.
SHEETROCK Brand TEXTONE Vinyl-Faced Panels, together with Mouldings
factory-wrapped in Vinyl, fasteners, adhesives and other conventional
drywall components, are used for predecorated permanent partitions,
demountable partitions and in remodeling work. Not recommended for
ceilings because end joints are difficult to conceal.
The rugged, scuff-resistant vinyl is embossed for texture and wood-
grain effects.
16
TEXTONE 1. For adhesive application of SHEETROCK Brand TEXTONE Vinyl-Faced
Vinyl-Faced Panel Panels, only water-thinned adhesives are recommended. Other adhesives
Limitations may not be compatible and could result in delamination and
discoloration of vinyl surface.
2. If SHEETROCK Brand TEXTONE Vinyl-Faced Panels, FIRECODE Core, are used
in a fire-rated assembly, instead of a non-vinyl-faced product such as
SHEETROCK Brand Gypsum Panels, FIRECODE Core, the applicable fire test
must permit exposed joints or battens.
3. Not recommended for use over foil-back panels or other vapour
retarder in exterior walls.
4. Avoid exposure to excessive or continuous moisture and extreme
temperatures.
5. Do not apply SHEETROCK Brand TEXTONE Vinyl-Faced Gypsum Panels or
field laminate nonpermeable vinyls over gypsum panels on exterior
walls in hot, humid climates without suitable vapour control or dry air
circulation behind the panels.
Technical SHEETROCK Brand TEXTONE Vinyl-Faced Panels鈥攎eet ASTM C960;
Data: gypsum panels comply with ASTM C36 and C1396. Light-reflectance
values available on request. (See Surface Burning Characteristics below.)
Panels are manufactured 12.7 mm (1/2 ) thick, 1220 mm (4 ) wide, and
2745 mm (9 ) long. They may also be specially ordered in 9.5 mm (3/8 )
and 15.9 mm (5/8 ) thicknesses, and custom lengths from 1830 mm (6 )
to 4270 mm (14 ). SHEETROCK Brand TEXTONE Vinyl-Faced Panels, FIRECODE
Core, with special core for fire-rated construction, are available in 12.7 mm
(1/2 ) and 15.9 mm (5/8 ) thicknesses, 1220 mm (4 ) wide. (See current
Technical Folder SA-928 for pattern and color selections. Contact sales
representative for custom colors and patterns also available.)
Vinyl covering of SHEETROCK Brand TEXTONE Vinyl-Faced Panels is directly
attached to gypsum panel without sheeting.
17
Products
Specifications鈥擲HEETROCK Brand TEXTONE Vinyl-Faced Panel Vinyl
1
Panel surface burning characteristics(1) and vapour permeance(2)
SHEETROCK Brand TEXTONE Vinyl- Film thickness Flame Smoke
Faced Pattern or weight spread dev.
鈮? 25 鈮? 50
Pumice 6 mils
鈮? 25 鈮? 50
Moonstone 8 mils
鈮? 25 鈮? 50
Granite 6 mils
鈮? 25 鈮? 50
Tweed 5.3 oz./yd.2
鈮? 25 鈮? 50
Trafalgar 5.3 oz./yd.2
鈮? 25 鈮? 50
Academy 5.3 oz./yd.2
鈮? 25 鈮? 50
Burlap 5.3 oz./yd.2
鈮? 25 鈮? 50
Striae 5.3 oz./yd.2
鈮? 25 鈮? 50
Sonoma 5.3 oz./yd.2
鈮? 25 鈮? 50
Brushwork 5.3 oz./yd.2
鈮? 25 鈮? 50
Pebble-Glip 2 mils
(1) Tested in accordance with ASTM E84. (2) Tested in accordance with ASTM E96-90. (3) Comply with Federal Specification CCC-2-408C, Type 1.
Floor Underlayment Products
FIBEROCK Brand AQUA-TOUGH Underlayment A fiber-reinforced panel
for floor underlayment in residential construction. These panels resist
indentation. They are free of resins, adhesives, solvents and dyes and are
approved by major resilient-flooring and adhesive manufacturers. They
have a surface coating that enhances bonding and workability. Available
6.4 mm (1/4 ) to 9.5 mm (3/8 ) thick. FIBEROCK Underlayment
AQUA-TOUGH is suitable for ceramic tile, resilient, hardwood and carpet
in all areas of residential construction. See current literature for the
latest application information.
DUROCK Brand Underlayment A glass fiber-mesh reinforced aggregat-
ed portland cement panel for floors and countertops. Its nominal 8 mm
(5/16 ) thickness helps eliminate transition trim when abutting carpet or
wood flooring, and it helps minimize level variations with other finish
materials. Its 1220 x 1220 mm (4 x 4 ) size is easy to handle and helps
cut down on waste. It may be applied directly over old substrate on
countertops to save time. Regular 12.7 mm (1/2 ) DUROCK Brand
Cement Board may also be used for underlayment applications.
18
Suspended Ceiling Products
Suspended ceilings offer the advantages of variable ceiling height and
expanded plenum usage that are not always available with conven-
tional ceiling construction. CGC offers several products for suspended
ceiling construction that provide superior performance in the areas of
fire resistance and sound attenuation. See Chapter 9 for information on
acoustical ceilings.
SHEETROCK Brand SHEETROCK Brand TEXTONE Gypsum Lay-In Panels, with CLIMAPLUS
TEXTONE Gypsum performance, are designed for use in standard ceiling suspension systems
Lay-In Panel for exceptional economy, ease of installation and accessibility to the
plenum. FIRECODE C Core Panels also qualify for UL design fire-rated
assemblies to 1-1/2 hours (UL design G222) and 2 hours (UL design
G259) when used with fire-rated steel suspension systems such as DONN
DXL, DXLA or ZXLA grid systems. SHEETROCK Brand Gypsum Lay-In Panels,
with CLIMAPLUS performance, are made of 12.7 mm (1/2 ) regular Core and
FIRECODE C Core gypsum board in both 610 x 610 mm (2 x2 ) or 610 x
1220 mm (2 x4 ) sizes. Both sizes are available with either laminated white
vinyl facing or natural paper facing.
All ClimaPlus performance products carry a warranty to withstand
conditions up to 40掳C (104掳F) and 90% relative humidity without
visible sag. The panels are guaranteed for 10 years against visible sag,
or 15 years when used with DONN Brand Suspension Systems.
Vinyl facing is embossed in a stipple pattern for a soft, lightly textured look.
It is 2 mils thick for toughness and durability, and can withstand repeated
washings with no sign of abrasion. Natural paper facing can be left plain
for utilitarian applications or can be painted to match room color scheme.
SHEETROCK Brand TEXTONE Gypsum Lay-In Ceiling Panels, with CLIMAPLUS
performance, are safe, sanitary and washable. They meet USDA
requirements for kitchens, restaurants and other food service areas
and are suitable for hospitals, laboratories, nursing homes and other
health care facilities. Attain interior finish classification Type III, Form A,
Class 3; Class A (NFPA 101). Panels with white vinyl facing achieve
light reflectance LR1. Panels also can be used in applications such as
covered entryways and parking garages.
SHEETROCK Brand SHEETROCK Brand TEXTONE CLEAN ROOM ClimaPlus Class 100 Panels have
CLEAN ROOM embossed vinyl laminated facing and meet Federal Standard
CLIMAPLUS 209E; 鈥淐lean Room and Work Station Requirements Controlled
Vinyl Panels Environment.鈥?
Advantages Conventional Installation Tiles install quickly and easily in standard
exposed grid.
Easy Maintenance Embossed vinyl facing is washable to keep sur-
face bright and light-reflecting.
Outdoor Applications Excellent in protected areas when used with
compatible suspension system, such as DONN Environmental ZXA grid,
which features 25-gauge, hot-dipped galvanized steel with corrosion-
resistant aluminum face. 1220 mm (4 ) hanger spacing achieves
intermediate-duty rating vs. 915 mm (3 ) spacing for aluminum grids.
19
Products
Sound Attenuation Tiles provide CAC range of 40.
1
Performance Tiles qualify for fire-rated assemblies. Surface burning
characteristics: Flame Spread 20, Smoke Developed 5. Class A rated
on all products (ASTM E84 test procedure). Thermal performance up to
R-0.45. Weight 9.77 kg/m2 (2.00 lb./ft.2)
Specifications鈥擲HEETROCK Brand Gypsum Lay-In Panel
Regular FIRECODE C
Item NRC CAC Item NRC CAC
Size Edge No. Range Min. No. Range Min.
SHEETROCK Brand 610x610x12.7 mm (2 x2 x1/2 ) Square 鈥? N/A 40 3260 N/A 5
Gypsum Lay-In 610x1220x12.7 mm (2 x4 x1/2 ) Square 鈥? N/A 40 3270 N/A 5
Panel
Unfinished Paper 610x1220x12.7 mm (2 x4 x1/2 ) Square 鈥? N/A 40 3450 N/A 5
Facing SHEETROCK Brand
Lay-In Gypsum Panel
SHEETROCK Brand CLEAN 610x1220x12.7 mm (2 x4 x1/2 ) Square N/A N/A 40 3200 N/A 5
ROOM CLIMAPLUS Gypsum
Lay-In Panel
CGC Drywall The CGC Drywall Suspension System provides a fast and economical
Suspension System method of installing a gypsum panels ceiling while supplying support
for lighting and air handling accessories. The system is designed for direct
screw attachment of gypsum panels to produce either flat or curved
surfaces. Single panels may be up to 15.9 mm (5/8 ) thick. Double-layer
panel applications may be up to 32 mm (1-1/4 ) combined thickness.
The CGC Drywall Suspension System is made of hot-dipped galvanized
steel. Main tees are 38 mm (1-1/2 ) high x 3660 mm (144 ) long with a
rectangular top bulb and 24 mm (15/16 ) or 38 mm (1-1/2 ) wide flange.
The system offers the option of using 37 mm (1-7/16 ) wide-faced furring
Vault Drywall Ceilings
Flat Drywall Ceilings
20
cross channels or 38 mm (1-1/2 ) wide furring cross tees for gypsum
panel attachment. Face of both cross channels and cross tees is knurled
to improve fastening of drywall screws. Also available are tees with
24 mm (15/16 ) exposed flange to be used with lay-in light fixtures.
Direct-hung CGC Drywall Suspension System is used in UL designs with
fire ratings of 1, 1-1/2, 2 and 3 hours. 1-hour UL designs: L-502, L-508,
L-513, L-515, L-525, L-526, L-529, P-501, P-507, P-508, P-509,
P-510, P-516. 1-1/2-hour UL designs: D-501, G-528, P-239, P-506,
P-507, P-510, P-513. 2-hour UL designs: D-501, D-502, G-523, G-524,
G-525, G-526, G-527, G-529, J-502, L-211, P-237, P-241, P-501,
P-514. 3-hour UL designs: G-523, G-527, G-529, J-502. Consult UL
Fire Resistance Directory and revisions for further information and
construction details.
Advantages Labor Saving Factory-controlled module spacing and snap-lock
connection of cross channels and cross tees with main tees cuts instal-
lation time.
Cost Saving Components are low in cost compared with conventional
construction to achieve the same result.
Strength Strong metal components are designed with interlocking
tabs and splicing mechanisms to resist twisting of assembly.
Accommodates Light Fixtures Accepts NEMA type G light fixtures.
System Main Tee Conforms to ASTM C635 Heavy-Duty Main Tee Classification.
Components Designed to support gypsum board ceiling with maximum deflection of
1/360 of the span. Double-web design, 38 mm (1-1/2 ) high x 3660 mm
(12 ) long, rectangular top bulb, 24 mm (15/16 ) wide flange, integral
reversible end splice. Furring cross channel holes 102 mm (4 ) from
ends, spaced 203 mm (8 ) o.c., hanger wire holes 102 mm (4 ) o.c.
DGCL Cross Channel Hat-shaped formed section, 37 mm (1-7/16 )
wide x 22 mm (7/8 ) high knurled screw surface, integral end locks
stamped at each end. For fire-rated assemblies.
DGLW Cross Tee 38 mm (1-1/2 ) high, roll formed into double web
design with rectangular bulb, 38 mm (1-1/2 ) knurled face and a steel
cap, high-tensile- steel double-locking and self-indexing end clenched
to web. For fire-rated assemblies.
DGL Cross Tee 38 mm (1-1/2 ) high, roll-formed into double-web
design with rectangular top bulb, 24 mm (15/16 ) exposed flange,
high-tensile-steel double-locking and self-indexing end clenched to web.
Channel Moulding U-shape DGCM 25, 25.4 mm (1 ) flange x 40 mm
(1-9/16 ) or 25.4 mm (1 ) x 38 mm (1-1/2 ) angle. L-shape DGWM 24,
25.4 mm (1 ) x 38 mm (1-1/2 ).
Hanger Wire Galvanized carbon steel, soft temper, prestretched, yield
stress load at least five times design load, but not less than 12-gauge wire.
CGC Drywall The CGC Drywall Suspension System is uniquely engineered to take
Suspension System 鈥? advantage of curved metal framing components and flexible gypsum
Curved Surfaces panels to produce arched and/or wavy ceiling surfaces. Framing com-
ponents are formed channels in a variety of standard radii. The system
is designed for direct screw attachment of gypsum panels.
21
Products
The suspension system segments main tees with radii ranging from
1
787 mm (31 ) to 7874 mm (310 ) in both vault and valley shapes.
The system easily accommodates transferring from straight to curved
members and from concave to convex directions. Tees can be field cut to
specific arc or chord lengths. Main tees are 3660 mm (144 ) long before
bending. Spans from single sections vary. Main tees and cross channels
both have knurled surfaces to aid screw attachment of gypsum panels.
The system is completed with attachment of SHEETROCK Brand Gypsum
Panels. Joints are taped and finished with a SHEETROCK Brand joint
treatment system. Fire-rated constructions are achievable with multiple
layers of the gypsum panels.
Advantages Labor Saving Components are factory prepared for easy installation
of the main-tee and cross-tee assembly.
Accuracy Uniform arched components assure accurate fit of attached
components, including gypsum panels.
Esthetic Appearance Dynamic arched or wavy surface is esthetically
pleasing.
Curved System Curved Main Tees Conform to ASTM C635 Heavy Duty Main Tee
Components Classification. 38 mm (1-1/2 ) high, galvanized cold-rolled-steel tee with
24 mm (15/16 ) flange comes with various radius curvatures in either
concave or convex direction. Tee length before bending is 3660 mm
(144 ). Tee web is punched 102 mm (4 ) from the end and thereafter at
203 mm (8 ) intervals to accept cross channels. Web also is punched at
915 mm (3 ) intervals with holes to accept hanger wire.
Cross Channel Hat-shaped, galvanized-steel channel has 37 mm (1-7/16 )
wide knurled screw surface for convenient attachment of gypsum panels.
Hanger Wire Galvanized carbon steel, soft temper, prestretched, yield
stress load at least five times design load, but not less than 12-gauge
wire.
CGC Drywall A special feature of the CGC Drywall Suspension System is the array of
Suspension System 鈥? fascia trim designed to finish edges that do not abut walls, soffits, or
Fascia Applications adjacent ceilings. The trim strips, called COMP脛SSO Trim, are available
either flat or curved (convex or concave) to meet design requirements.
Trim system is designed for parallel, perpendicular or angled attach-
ment to suspension system tees.
Advantages Labor Saving Components are factory prepared for easy installation.
Cost Saving Trim is low in cost compared with conventional construc-
tion to achieve the same result.
Esthetic Appearance Flat or curved fascia trim is esthetically pleasing.
COMP脛SSO COMP脛SSO Trim Available flat or in a variety of radii to match design
Fascia Trim requirements. Widths available up to 203 mm (8 ).
Components
COMP脛SSO Drywall Clip Provides ready attachment of COMP脛SSO Trim
to main or cross tees, either parallel or perpendicular to the tee direction.
Clip edges fit snugly inside trim edges; screw attach to tees.
22
Bead and Trim Accessories
CGC sells and distributes construction, drywall and plastering steel
products. These trim accessory products include corner reinforce-
ments, beads, trims, control joints and decorative mouldings.
Paper Faced Metal SHEETROCK/BEADEX Brand Paper Faced Metal Bead and Trim Paper
Bead and Trim faced metal corner bead ensures durable reinforcement of drywall
corner and delivers positive adhesion of the bead face paper to the
face of the panel. As a result, edge cracking is virtually eliminated, reducing
contractor callbacks. Bead is applied using setting type, taping or
all-purpose joint compound instead of nails to bond the bead to gypsum
panel surfaces. Then bead edge is finished with typical joint treatment
system. SHEETROCK/BEADEX Brand Paper Faced Metal Bead and Trim is
available in a full range of types and sizes, including outside corners in
regular and bullnose profiles, offset corners, flexible metal corner tape,
inside corners, inner cove, L-shaped trim, J-shaped trim and reveal trim.
SHEETROCK/BEADEX Brand Paper Faced Metal Outside Corner, Tape
On Bead (B1W, B1XW EL, B1 Super Side) For 90掳 outside corners.
Suitable for use on any thickness of wallboard. Comes in several
flange/paper widths: B1W鈥攔egular width, B1XW EL鈥攅xtra wide, B1
Super Wide鈥攕uper wide.
SHEETROCK/BEADEX Brand Paper Faced Metal Inside Corner, Tape On
Trim (B2) Designed to form a true inner 90掳 corner. For use with any
thickness of wallboard.
SHEETROCK/BEADEX Paper Faced Metal Offset Outside Corner, Tape
On Bead (B1 OS) For 135掳 corners. Offset bead is designed to give a
true offset corner with a smaller bead height for less compound fill.
Can be used with any thickness of wallboard.
SHEETROCK/BEADEX Brand Paper Faced Metal Offset Inside Corner,
Tape On Bead (B2 OS) Designed to provide a true offset angle on
inside corners greater than 90掳. Use on any thickness of wallboard.
SHEETROCK/BEADEX Brand Paper Faced Metal 19 mm (3/4 ) Bullnose
Outside Corner, Tape On Bead (SLOC) Use to create a rounded 19 mm
(3/4 ) radius 90掳 corner angle. For use with 12.7 mm (1/2 ) or 15.9 mm
(5/8 ) gypsum panels.
SHEETROCK/BEADEX Brand Paper Faced Metal Inner Cove, Tape On
Trim (SLIC) Creates a rounded 19 mm (3/4 ) radius 90掳 inside corner.
For use with 12.7 mm (1/2 ) or 15.9 mm (5/8 ) gypsum panels.
SHEETROCK/BEADEX Brand Paper Faced Metal Bullnose Offset
Outside Corner, Tape On Bead (SLOC OS) Forms a rounded 135掳 off-
set outside corner. Ideal for bay window offsets and similar applications.
*Note- SHEETROCK Brand Paper Faced Metal Bead and Trim is sold in Eastern Canada.
BEADEX Brand Paper Faced Metal Bead and Trim is sold in Western Canada.
23
Products
SHEETROCK/BEADEX Brand Paper Faced Metal Offset Inner Cove, Tape
1
On Trim (SLIC OS) Forms a smooth cove for 135掳 inside corners.
SHEETROCK/BEADEX Brand Paper Faced Metal 38 mm (1-1/2 ) Bullnose
Outside Corner, Tape On Bead (Danish) Broader and gentler corner than
19 mm (3/4 ) radius bullnose. Use with 12.7 mm (1/2 ) or 15.9 mm (5/8 )
thick wallboard.
SHEETROCK/BEADEX Brand Paper Faced Metal 鈥淟鈥? Shaped Tape On
Trim (B4 Series) For use where wallboard abuts suspended ceilings,
beams, plaster, masonry and concrete walls, as well as untrimmed
door and window jambs.
SHEETROCK/BEADEX Brand Paper Faced Metal Outside Corner (Micro
Bead) Reduced bead height results in less joint compound consump-
tion. Extra wide flanges for maximum corner coverage.
SHEETROCK/BEADEX Brand Paper Faced Metal Reveal, Tape On Trim (B4
NB) Modified tape-on 鈥淟鈥? trim solves problems with reveals on soffits,
wall offsets, ceilings, light boxes and other interior architectural features.
B4 Reveal features a paper flange on both trim legs, eliminating the need
to caulk the edge of reveal details and providing a cleaner, straighter line.
SHEETROCK/BEADEX Brand Paper Faced Metal 鈥淛鈥? Shaped Tape On
Trim (B9) Used to finish rough drywall panel ends. Ideal for use at win-
dow and door openings and casements.
SHEETROCK/BEADEX Brand Flexible Metal Corner Reinforcing Tape A
flexible reinforcing tape that ensures straight, sharp corners on any angle
(shown at left and below). Provides durable corner protection on cathedral
and drop ceilings, arches and around bay windows. Tape is 52 mm
(2-1/16 ) wide and has 1.6 mm (1/16 ) gap between two 12.7 mm (1/2 )
wide galvanized steel strips. When folded, tape forms a strong corner
bead. applied with standard joint compound feathered at the edges for a
smooth wall surface. Also used to join drywall partition to plastered wall in
remodeling and for repairing chipped and cracked corners. Available in
convenient 30 m (100-ft). rolls in dispenser box.
(1) Metric dimensions (see below)
1/32"
11/16" 1/2"
SHEETROCK flexible metal corner tape (in exterior corner position)
(1) Metric dimensions: 1/32" = 0.8 mm; 1/2" = 12.7 mm; 1-1/16" = 27 mm;
*Note- SHEETROCK Brand Paper Faced Metal Bead and Trim is sold in Eastern Canada.
BEADEX Brand Paper Faced Metal Bead and Trim is sold in Western Canada.
24
Metal Beads Metal corner beads permit positive fastening to studs and construction
of true, concealed external angles with gypsum base and panels. The
exposed nose of the bead helps prevent damage from impact and pro-
vides a screed for finishing.
Metal Corner Bead A specially galvanized steel reinforcement for pro-
tecting external corners in drywall construction. It is screwed or nailed
to framing through the panels and concealed with CGC joint com-
pounds as a smooth, finished corner. Flanges also may be attached
with a clinch-on tool. Available in 32 mm (1-1/4 ) x 32 mm (1-1/4 )
flange width.
Expanded Flange Corner Bead No. 800 A galvanized steel external cor-
ner reinforcement with 32 mm (1-1/4 ) wide fine-mesh expanded flanges,
tapered along outer edges to enhance concealment. It is easily nailed or
stapled. Provides superior bond to panels and base with joint compound
and veneer plaster finishes through approx. 90 keys per lin. ft. It also
provides the proper 1.6 mm (1/16 ) grounds for one-coat veneer finishes.
Expanded Flange Corner Bead No. 900 Used with two-coat veneer
plaster systems. It provides 2.4 mm (3/32 ) grounds and its 32 mm
(1-1/4 ) fine-mesh flanges can be either stapled or nailed. Provides
reinforcement equivalent to No. 800.
(1) Metric dimensions (see below)
Metal Corner Bead
Expanded Flange
Corner Bead, Nos. 800
and 900
(1) Metric dimensions: 1/8" = 3 mm; 1-1/8" = 28.6 mm; 1-1/4" = 32 mm;
25
Products
1
Metal Trim Metal Trims provide maximum protection and neat finished edges to
gypsum panels and bases at window and door jambs, at internal
angles and at intersections where panels abut other materials. Easily
installed by nailing or screwing through the proper leg of trim. Made in
following types and sizes:
L-Trim & J-Trim Galvanized steel casing for gypsum panels, J-shaped channel
in 12.7 mm (1/2 ) and 15.9 mm (5/8 ) sizes; L-shaped angle edge trim without
back flange to simplify application, in 12.7 mm (1/2 ) and 15.9 mm (5/8 ) sizes.
Both require finishing with CGC joint compounds.
J-Stop Reveal type all-metal trim for drywall panels, requires no finishing
compound, in 12.7 mm (1/2 ) size, and in 15.9 mm (5/8 ) size.
(1) Metric dimensions (see below)
Metal J-Trim
Metal L-Trim
J-Stop
(1) Metric dimensions: 3/8" = 9.5 mm; 1/2" = 12.7 mm; 5/8" = 15.9 mm; 7/8" = 22 mm;
1-1/8" = 28.6 mm;
26
(1) Metric dimensions (see below)
No. 701-A Metal Trim
No. 801-A Metal Trim
No. 701-B Metal Trim
No. 801-B Metal Trim
(1) Metric dimensions: 1/16" = 1.6 mm; 3/32" = 2.4 mm; 1/2" = 12.7 mm; 1-1/4" = 32 mm;
Expanded Flange L-Trim & J-Trim, No. 700 series All-metal trim
provides neat edge protection for two-coat veneer plaster finishes at cased
openings and ceiling or wall intersections. Fine-mesh expanded flanges
strengthen veneer bond and eliminate shadowing. No. 701-A J-shaped
channel-type, and No. 701-B L-shaped angle edge trim provide 2.4 mm
(3/32 ) grounds; sizes for 12.7 mm (1/2 ) and 15.9 mm (5/8 ) thick
gypsum base.
Expanded Flange L-Trim & J-Trim, No. 800 series All-metal trim
companion to 700 series, but with 1.6 mm (1/16 ) grounds for one-coat
veneer plaster finishes or finishing with joint compound in drywall appli-
cations. Fine-mesh 32 mm (1-1/4 ) expanded flanges strengthen veneer
bond, eliminate shadowing, provide a superior key and are easily nailed
or stapled. No. 801-A J-shaped channel-type, and No. 801-B L-shaped
angle edge trim come in sizes for 12.7 mm (1/2 ) and 15.9 mm (5/8 )
thick panels and bases.
27
Products
1
Control Joints Control Joints are used to relieve stresses induced by expansion and
contraction in large ceiling and wall expanses in drywall and veneer
plaster systems. Used from door header to ceiling; from floor to ceiling
in long partitions and wall furring runs; from wall to wall in large ceiling
areas. Made from roll-formed zinc to resist corrosion. The control joint
is covered with a roll-formed zinc trim member with a 6.4 mm (1/4 )
slot protected by plastic tape which is removed after finishing.
Zinc Control Joint No. 093 For interior applications. Provides 2.4 mm
(3/32 ) grounds for drywall and veneer finishes. Staple-applied to panel
face. Requires finishing. Limitation: Where fire and sound control are
prime considerations, a seal must be provided behind the control joint.
(1) Metric dimensions (see below)
Control Joint No. 93
7 /8"
7
/16"
1
/4"
3 /32"
(1) Metric dimensions: 3/32" = 2.4 mm; 1/4" = 6.4 mm; 7/16" = 11 mm; 7/8" = 22 mm;
28
Framing Components
CGC pioneered the development of steel framing components for gypsum
construction. They offer the advantages of light weight, low material
cost, quick erection, and superior strength and versatility in meeting
job requirements.
Today, steel studs and runners are available from a number of manufac-
turers. It is important to note that while manufacturers produce the same
gauge of material, the steel properties and thicknesses can vary from
manufacturer to manufacturer. To assure the best system performance,
manufacturer specifications should be checked against the design and
minimum thicknesses provided by CGC. Failure to do so could result in
excessive deflection, overstressed or even buckled steel studs.
CGC does not sell common steel framing, however, the following pro-
vides a description of framing components that are used in CGC
partitions.
It is important that light-gauge steel components such as steel studs
and runners, furring channels and resilient channels be adequately
protected against rusting in the warehouse and on the job site.
Steel Studs Steel studs and runners are channel-type, roll-formed from corrosion-
and Runners resistant steel, and designed for quick screw attachment of facing
materials. They are strong, non-load bearing components of interior
partitions, ceilings and column fireproofing and as framing for exterior
curtain wall systems. Heavier thickness members are used in load-
bearing construction. Limited chaseways for electrical and plumbing
services are provided by punchouts in the stud web. Matching runners
for each stud size align and secure studs to floors and ceilings, also
functioning as headers.
25-ga. 0.46 mm (18-mil) Studs and Runners Efficient, low-cost 25-ga.
members for framing non-load bearing interior assemblies. Studs come in
widths to match wood framing dimensions and are available in lengths up to
6100 mm (20-ft.) Runners come in matching stud widths鈥?3050 mm
(10-ft.) lengths. Not recommended for high-density board applications, such
as for DUROCK Brand Cement Board or FIBEROCK Brand Abuse-Resistant Panels.
22-ga. 0.72 mm (27-mil) Studs and Runners Heavier gauge, stronger
studs in widths of 64 mm (2-1/2 ), 92 mm (3-5/8 ), 102 mm (4 ) and
152 mm (6 ). Runners come in widths to match studs. Not recommended
for high-density board applications, such as for DUROCK Brand Cement
Board or FIBEROCK Brand Abuse-Resistant Panels.
20-ga. 0.84 mm (33-mil) Studs and Runners Heavier 20-ga. mem-
bers used in framing interior assemblies requiring greater-strength studs,
and reinforcement for door frames. Also used in curtain wall assemblies.
29
Products
Studs available in 64 mm (2-1/2 ), 92 mm (3-5/8 ), 102 mm (4 ), 152 mm
1
(6 ) widths鈥攃ut-to-order lengths up to 8535 mm (28 ft.) Runners come
in stud widths, 3050 mm (10-ft.) lengths.
Studs and Runners should be hot-dip galvanized.
Load-Bearing Studs and Runners Used for framing load-bearing
interior and exterior walls and non-load bearing curtain walls. These
studs have stiffened flanges and are available in several sizes.
Typical Steel Thickness鈥擲teel Studs and Runners(1)
Design(2) Minimum(2)
Stud/Runner Gauge (3) mm in. mm in.
25 0.48 0.0188 0.45 0.0179
22 0.72 0.0283 0.68 0.0269
20 0.88 0.0346 0.84 0.0329
18 1.15 0.0451 1.09 0.0428
16 1.44 0.0566 1.37 0.0538
14 1.82 0.0713 1.72 0.0677
12 2.59 0.1017 2.45 0.0966
(1) Uncoated steel thickness; must meet ASTM A568. Studs and runners meet ASTM C645. Coatings are hot-dip galvanized per ASTM
A653 or aluminum-zinc per ASTM A792 or ASTM A591(weight equivalent of A653). (2) Data is from Steel Stud Manufacturers Association
(SSMA) catalog. (3) For information only; refer to limiting height tables and structural properties for design data.
There is a serious misconception within the construction industry
regarding the substitution of one manufacturer鈥檚 studs for those of
another manufacturer. The assumption is that all studs of a given size
and steel thickness are interchangeable. It is possible that the substi-
tution can safely be made, but the decision should not be made until
the structural properties of the studs involved are compared. Most reli-
able manufacturers publish structural property tables in their technical
literature. CGC includes recommended minimum thickness data in all
architectural technical literature covering steel-framed systems.
(1) Metric dimensions (see below)
25-ga.-15/8", 21/2",
35/8", 4", 6"
22-ga., 20-ga.-, 21/2",
35/8", 4", 6" 1", 11/4"
5/16"
to match
11/4"
studs
Steel stud Steel runner
(25, 22, 20, 18, 16, 14-ga.) (25, 22, 20, 18, 16, 14-ga.)
(1) Metric dimensions: 5/16" = 8 mm; 1" = 25 mm; 1-1/4" = 32 mm; 1-5/8" = 41 mm;
2-1/2" = 64 mm; 3-5/8" = 92 mm; 4" = 102 mm; 6" = 152 mm;
30
Cavity Shaft Wall & Area Separation
Fire Wall/Party Wall Components
These steel components are lightweight, versatile non-load bearing
members of economical, fire and sound-barrier systems: (1) Area
Separation Walls between units in multifamily wood-frame buildings;
(2) Shaft Walls around elevator and mechanical shafts, return air ducts,
stairwells and smoke shafts in multi-story buildings. Components are
formed from corrosion-resistant steel: C-H Stud base metal meets
structural performance standards in ASTM A446, Grade A. Components
should be hot-dipped galvanized.
(1) Metric dimensions (see below)
1" 1" 11/2"
21/2"
4", 6" 21/2", 4", 6"
13/8"
/8"
3
/32"
7
1" /4"
3
1"
1" /4"
3
Steel E-studs Steel C-H stud
1"
2"
3"
21/2", 4", 6" 1"
21/2", 4", 6"
Steel jamb strut (20 ga.) Steel J-runner
13/8"
2" 2"
2"
1"
2", 21/2"
Steel C-runner Steel H-stud (two piece) Steel H-stud (one piece)
(1) Metric dimensions: 7/32" = 5.6 mm; 3/8" = 9.5 mm; 3/4" = 19 mm; 1" = 25 mm; 1-3/8" = 35 mm; 1-1/2" = 38 mm;
2" = 51 mm; 2-1/2" = 64 mm; 3" = 76 mm; 4" = 102 mm; 6" = 152 mm;
31
Products
(1) Metric dimensions (see below)
1
2"
21/2"
2" 13/8"
21/2" /8"
7
21/2"
Breakaway clip Metal angle runner Corner angle
(1) Metric dimensions: 7/8" = 22 mm; 1-3/8" = 35 mm; 2" = 52 mm; 2-1/2" = 64 mm;
Thickness鈥擜rea Separation, Shaft Wall and Furring Components(1)
Design(2) Minimum
Component
Designation mm in. mm in. Gauge(3)
CR, CH, ES25 0.48 0.0188 0.45 0.0179 25
JR24 0.61 0.0239 0.58 0.0227 24
Metal Angles 0.61 0.0239 0.58 0.0227 24
CH22 0.79 0.0310 0.75 0.0294 22
ES, JR, JS, CH20 0.91 0.0359 0.87 0.0341 20
(1) Uncoated steel thickness; meets ASTM A568. Studs and runners meet ASTM C645. Base metal meets ASTM A446 standards for
structural performance. Min. yield strength 228 Mpa (33 ksi), except C-H stud 276 Mpa (40 ksi). Coatings are hot-dip galvanized per
ASTM A525; aluminized per ASTM A463, or aluminum-zinc per ASTM A792. (2) Conforms to AISI Specification for the Design of Cold Formed
Steel Structural Members, 1986 edition. (3) For information only; refer to limiting height tables and structural properties for design data.
Cavity Wall Components 64 mm (2-1/2 ), 102 mm (4 ) and 152 mm
(6 ) wide and designed for use with 25 mm (1 ) thick SHEETROCK Brand
Gypsum Liner Panels. CGC Steel C-H Studs 64 mm (2-1/2 ), 102 mm (4 )
and 152 mm (6 ) are non-load bearing sections installed between
abutting liner panels. They have 25 mm (1 ) holes spaced 300 mm (12 )
to 400 mm (16 ) from each end for easy installation of horizontal pipe and
conduit. CGC Steel E-Studs are 64 mm (2-1/2 ), 102 mm (4 ) or 152 mm
(6 ) wide, used singly to cap panels at intersections with exterior walls or
back-to-back as studs in unusually high partitions. CGC Steel J-Runners,
made with unequal legs, are used at floor and ceiling in Shaft Walls. CGC
Steel C-Runners are used singly at terminals, top and bottom of wall and
back-to-back between vertical liner panels at intermediate floors, in Area
Separation Walls. CGC Steel Jamb Struts (20-gauge), 64 mm (2-1/2 ),
102 mm (4 ) and 152 mm (6 ) wide, are used in jamb framing for
fire-rated elevator doors.
Solid Wall Components 52 mm (2 ) wide and used with two thick-
nesses of 25 mm (1 ) Gypsum Liner Panels. CGC Steel H-Studs fit over
and engage edges of adjacent liner panels. CGC Steel C-Runners are
used in area separation walls as floor and top runners and back-to-
back between liner panels at intermediate floors. Also used singly to
cap Area Separation Walls.
CGC Aluminum Breakaway Clip A 52 mm (2 ) wide angle clip made
of 16 mm (0.63 ) thick aluminum. Used to attach Area Separation Walls
to intermediate floor and roof framing. Clips are designed to melt and
break away when exposed to fire. 64 x 52 mm (2-1/2 x 2 ); approx.
27 kg/1,000 (60 lb./1,000) pcs.
32
Specifications鈥擜rea Separation Wall & Shaft Wall Components
Section Depth Length Approx. Weight
Component
Designation(1) mm in. mm ft. kg/100 m lb./1000 ft.
C-H Studs
212CH25 64 2-1/2 2440 to 3910 8 to 12 10 77.2 519
212CH20 64 2-1/2 2440 to 5840 8 to 19 2 148.8 1000
400CH25 102 4 2440 to 5150 8 to 16 11 91.1 612
400CH20 102 4 2440 to 6960 8 to 22 10 185.3 1245
600CH20 152 6 2440 to 8530 8 to 28 203.3 1366
E-Studs
212ES25 64 2-1/2 2440 to 3910 8 to 12 10 53.3 358
212ES20 64 2-1/2 2440 to 5840 8 to 19 2 108.5 729
400ES25 102 4 2440 to 5150 8 to 16 11 70.2 472
400ES20 102 4 2440 to 6960 8 to 22 10 144.3 970
600ES20 152 6 2440 to 8530 8 to 28 191.2 1285
J-Runners
212JR24 64 2-1/2 3050 10 79.6 535
212JR20 64 2-1/2 3050 10 109.5 736
400JR24 102 4 3050 10 101.2 680
400JR20 102 4 3050 10 139.4 937
600JR24 152 6 3050 10 128.0 860
600JR20 152 6 3050 10 177.2 1191
C-Runners
200CR25 51 2 3050 10 40.1 270
Metal Angles
64 x 64 mm (2-1/2 x 2-1/2 ) 64 2-1/2 3050 10 63.2 425
35 x 22 mm (1-3/8 x 7/8 ) 35 1-3/8 3050 10 28.3 190
Jamb Strut
212JS20 64 2-1/2 2440 to 3660 8 to 12 122.9 826
400JS20 102 4 2440 to 3660 8 to 12 152.7 1026
600JS20 152 6 2440 to 3660 8 to 12 186.9 1256
(1) All components shipped unbundled, additional charge for bundling.
Framing & Furring Accessories
Metal Angles Made of 24-ga. galvanized steel in two standard sizes. The
35 x 22 mm (1-3/8 x 7/8 ) size is used to secure 25.4 mm (1 ) liner
panels at floor and ceiling in laminated gypsum drywall partitions. Length:
3050 mm (10 ft.). Angles in other sizes and gauges available.
Cold-Rolled Channels Made of 16-ga. steel. Used in furred walls and
suspended ceilings. Available either galvanized or black asphaltum
painted. Sizes 19 mm (3/4 ) with 12.7 mm (1/2 ) flange, 38 mm (1-1/2 )
and 51 mm (2 ) with 13.5 mm (17/32 ) flange; lengths 3668 mm (12),
4880 mm (16) and 6100 mm (20) ft. (see page 34).
RC-1 Resilient Channel Made of 25-ga. corrosion resistant steel. One
of the most effective, lowest-cost methods of improving sound trans-
mission loss through wood and steel-frame partitions and ceilings.
33
Products
Used for resilient attachment of SHEETROCK Brand Gypsum Panels and GRAND
1
PRIX Brand Veneer Plaster Bases. Prepunched holes 102 mm (4 ) o.c. in the
flange facilitate screw attachment to framing; facing materials are screw-
attached to channels. Size 12.7 x 64 mm (1/2 x 2-1/2 ); length 3660 mm
(12 ft.); (see page 34).
Limitation: not for use beneath highly flexible floor joists; should be
attached to ceilings with 32 mm (1-1/4 ) Type W or TYPE S Screws
only鈥攏ails must not be used; see Framing Requirements, Chapter 2.
Z-Furring Channels Made of min. 24-ga. corrosion-resistant steel used to
mechanically attach THERMAFIBER FS-15 Insulating Blankets, polystyrene
insulation (or other rigid insulation) and gypsum panels or base to interior
side of monolithic concrete and masonry walls. Sizes 25.4 mm (1 ), 38 mm
(1-1/2 ), 52 mm (2 ), 76 mm (3 ); length 2590 mm (8 6 ), (see page 34).
Metal Furring Channels Roll-formed, hat-shaped sections made of 20
and 25-ga. corrosion resistant steel. They are designed for screw attach-
ment of gypsum panels and gypsum base in wall and ceiling furring. Size
22 x 65 mm (7/8 x 2-9/16 ); length 3660 mm (12 ft.); (see page 34).
Hanger and Tie Wire Galvanized soft annealed wire available in three
sizes: 8-ga. wire, used for hangers in suspended ceiling grid work, available
in 23 kg (50-lb.) coils (approx. 222.5 m (730 )); 12-ga. wire for the CGC
Drywall Suspension System; 18-ga. wire, used for wire-tying channels in
wall furring and ceiling construction, available in 23 kg (50-lb.) coils
(approx. 2533 m (8,310 )) and 11 kg (25-lb.) hanks (1220 mm (48 )
straight lengths鈥?1264 mm (4,148 ) total) (see page 35).
(1) Metric dimensions (see below)
21/2"
13/8"
/8"
7
21/2"
Metal angles
(1) Metric dimensions: 7/8" = 22 mm; 1-3/8" = 35 mm; 2-1/2" = 64 mm;
34
(1) Metric dimensions (see below)
Cold-rolled channel
RC-1 resilient channel
Z-furring channel
Metal furring channel
(1) Metric dimensions: 1/2" = 12.7 mm; 17/32" = 13.5 mm; 3/4" = 19 mm; 7/8" = 22 mm;
1" = 25 mm; 1-1/4" = 32 mm; 1-1/2" = 38 mm; 2" = 51 mm; 2-1/2" = 64 mm;
2-9/16" = 65 mm; 3" = 76 mm;
35
Products
Hanger and tie wire
1
Sound Control and Insulation Products
Adequate sound control and energy conservation are among the most
important requirements in today s buildings. The public has become
sufficiently aware of these factors to demand effective measures to
control unwanted sound and heat transfer in both commercial and resi-
dential construction. With its advanced research, CGC has been a leader
in developing new systems and products for efficient, low-cost sound
control and thermal insulation for new construction and remodeling.
THERMAFIBER Mineral Fiber Insulation products are manufactured by
Thermafiber LLC and marketed by CGC. They meet every important
insulation need鈥攖hermal, acoustical and fire protection. They provide
superior resistance to heat and sound transmission, resilience that
assures full installed thickness and outstanding durability.
THERMAFIBER Insulation products consist of spun mineral fibers formed
into mats of varying dimensions and densities, or into nodules for pour-
ing or blowing into framing spaces.
The use of THERMAFIBER Insulation products increases fire ratings of cer-
tain partition assemblies鈥攑rovides greater fire resistance than low-
melt point, glass-fiber insulation. Products without facings are rated
noncombustible as defined by NFPA 220 when tested per ASTM E136.
THERMAFIBER Insulation Blankets offer excellent sound-absorbing prop-
erties, in addition to providing thermal values. When used in partition
cavities, THERMAFIBER Insulation improved STC ratings up to nine points.
All THERMAFIBER Insulation products are asbestos-free. They resist
decay, corrosion and moisture, and will not support vermin.
36
Insulation CGC sells and distributes insulation blankets that are compatible with
Blankets the company鈥檚 other products and meet the performance specification
for the company鈥檚 recommended and tested systems. The best fire
protection and sound attenuation characteristics have been shown in
tested systems using insulation blankets or batts produced by
THERMAFIBER LLC.
THERMAFIBER Sound Attenuation Fire Blankets (SAFB) Paperless,
semi-rigid spun mineral fiber mat which substantially improves STC
ratings when used in stud cavities of CGC partition assemblies. Each
blanket has a dense, highly complex labyrinthine structure composed
of fibers which produce millions of sound-retarding air pockets. Easily
THERMAFIBER Sound
Attenuation Fire Blanket handled and cut; simple to install. Meet ASTM C665, Type I.
Creased THERMAFIBER Sound Attenuation Fire Blankets (SAFB)
Creased THERMAFIBER SAFB offers the most economical drywall and
veneer plaster sound systems in the 50 to 55 STC range. These fire-
rated systems are ideal for party and corridor walls in hotels, motels,
offices and multi-family dwellings.
The Creased THERMAFIBER SAFB system is a patented insulation blanket
assembly that is 25.4 mm (1 ) wider than regular blankets. In the field,
a 25.4 mm (1 ) deep vertical cut is made in the center and for the full
length of the blanket. The cut enables the wider-than-normal insulating
blanket to be buckled and the edges fitted into the partition stud cavity.
Installation of SHEETROCK Brand Gypsum Panels on the creased side
THERMAFIBER Sound
Attenuation Fire Blankets compresses the insulation blanket, applying pressure both to the studs
fit snugly between and the drywall. The applied pressure dampens sound vibrations in the
steel studs
partition and boosts its STC rating. For example, a single-layer drywall
partition with Creased THERMAFIBER SAFB has the same STC rating as an
unbalanced drywall partition with standard THERMAFIBER SAFB.
Specifications鈥擳HERMAFIBER Blankets(1)
Thickness Width Length Nom. Density Thermal Resistance(2)
product mm in. mm in. m ft. kg/m3 lb./ft.3 RSI R(3)
Sound Attenuation 25 1 406, 610 16, 24 1.22 4 0.25 4.0 0.7 4
Fire Blankets (SAFB) 38 1-1/2 406, 610 16, 24 1.22 4 0.16 2.5 1.0 5.6
51 2 406, 610 16, 24 1.22 4 0.16 2.5 1.3 7.4
76 3 406, 610 16, 24 1.22 4 0.16 2.5 2.0 11.1
(1) Check local availability of package sizes.
(2) C factor = 1 ; K factor = 1
R R/thickness
(3) 鈥淩鈥? value at 24掳 C (75掳 F), without facing.
37
Products
Fasteners 1
Gypsum Board Screws are corrosion-resistant and all (except Hex Washer Head type)
Screws have a Phillips-head recess for rapid installation with a special bit and
power-driven screw gun. The bugle head spins the face paper into the
cavity under the screwhead for greater holding power and helps pre-
vent damage to the gypsum core and face paper. Defects associated
with improper nail dimpling are eliminated. Other head types are
designed specifically for attaching metal to metal and installing wood
and metal trim. Screws meet ASTM C1002 (TYPE S and Type W) and
ASTM C954 (TYPE S-12 )
TYPE S Screws have specially designed drill point and threads that mini-
mize stripping, provide maximum holding power and pull-through resis-
tance in steel studs and runners. TYPE S Screws are designed for use with
steel up to 1 mm (.04 ) thick; TYPE S-12 Screws for steel from 1 mm (.04 )
to 1.8 mm (.07 ) thick (see table, below). The special threads on Type G
and Type W Screws offer superior holding power in attachment to gypsum
boards and wood framing, respectively. TAPCON Anchors provide fast, safe
attachment of steel components to poured concrete and concrete block
surfaces. Special 49 mm (1-15/16 ) TYPE S-12 Bugle Head Pilot Point
Screws are designed for attachment of plywood to steel joists and studs.
The superior pull-through resistance of Type W Screws has virtually
eliminated loose panel attachment and nail pops in wood-frame con-
struction. Tests have shown the Type W Screw to have 350% greater
pullout strength than GWB-54 nails. Fewer screws than nails are gen-
erally required, and the speed of installation using electric screwguns
compares favorably with nailing.
Secret to superiority of
screw attachment is shown
by comparative diagrams.
Bugle-head (left) screw depresses
face paper of gypsum panel
without tearing; threads cut into
and deform wood to hold tightly.
Longer drywall nail (right) grips
with friction, loosens hold as
wood shrinks, which may pop
nailhead above surface to
create callback situation.
38
Selector Guide for Screws
Fastening Application Fastener used Fig(2)
Gypsum panels to steel framing(1)
12.7 mm (1/2 ) single-layer panels to 25 mm (1 ) TYPE S bugle head 1
steel studs, runners, channels
15.9 mm (5/8 ) single-layer panels to 25 mm (1 ) TYPE S bugle head 1
steel studs, runners, channels 29 mm (1-1/8 ) TYPE S bugle head 1
19 mm (3/4 ) single-layer panels to 32 mm (1-1/4 ) TYPE S bugle head 1
steel studs, runners, channels
25.4 mm (1 ) coreboard to metal angle 41 mm (1-5/8 ) TYPE S bugle head 1
runners in solid partitions
12.7 mm (1/2 ) double-layer panels to 41 mm (1-5/8 ) TYPE S bugle head 1
steel studs, runners, channels
15.9 mm (5/8 ) double-layer panels to 41 mm (1-5/8 ) TYPE S bugle head 2
steel studs, runners, channels
19 mm (3/4 ) double-layer panels to 57 mm (2-1/4 ) TYPE S bugle head 2
steel studs, runners, channels
12.7 mm (1/2 ) panels through coreboard to metal 47 mm (1-7/8 ) TYPE S bugle head 2
angle runners in solid partitions
15.9 mm (5/8 ) panels through coreboard to metal 57 mm (2-1/4 ) TYPE S bugle head 2
angle runners in solid partitions 76 mm (3 ) TYPE S bugle head 2
25.4 mm (1 ) double-layer coreboard to 67 mm (2-5/8 ) TYPE S bugle head 2
steel studs, runners
Wood to steel framing
Wood trim over single-layer 25 mm (1 ) TYPE S or S-12 trim head 5
panels to steel studs, runners 41 mm (1-5/8 ) TYPE S or S-12 trim head 5
Wood trim over double-layer 57 mm (2-1/4 ) TYPE S or S-12 trim head 5
panels to steel studs, runners
Steel cabinets, brackets through 32 mm (1-1/4 ) TYPE S oval head 6
single-layer panels to steel studs
Wood cabinets through single- 41 mm (1-5/8 ) TYPE S oval head 6
layer panels to steel studs
Wood cabinets through double- 57 mm (2-1/4 ), 73 mm (2-7/8 ), 95 mm (3-3/4 ) 6
layer panels to steel studs TYPE S oval head
Steel studs to door frames, runners
Steel studs to runners 25 & 22-ga. 9.5 mm (3/8 ) TYPE S pan head 9
Steel studs to runners
Steel studs to door frame 9.5 mm (3/8 ) TYPE S-12 pan head 10
jamb anchors 20-ga. 16 mm (5/8 ) TYPE S-12 low-profile head 11
Other metal-to-metal attachment
(12-ga. max.)
Steel studs to door frame jamb anchor 13 mm (1/2 ) TYPE S-12 pan head 10
clips (heavier shank assures entry in 16 mm (5/8 ) TYPE S-12 low-profile head 11
clips of hard steel)
Metal-to-metal connections up to 19 mm (3/4 ) S-4 hex washer head 12
double thickness of 12-ga. steel Anticorrosive-coated
Gypsum panels to 12-ga. (max.) steel framing
12.7 mm (1/2 ) and 15.9 mm (5/8 ) panels 25 mm (1 ) TYPE S-12 bugle head 3
and gypsum sheathing to steel studs and runners;
specify anticorrosive-coated screws for
exterior curtain wall applications
Self-Furring Metal Lath and brick wall ties 32 mm (1-1/4 ) TYPE S-12 bugle head 4
through gypsum sheathing to steel studs 32 mm (1-1/4 ) TYPE S-12 pancake head 13
and runners; specify anticorrosive-coated
screws for exterior curtain wall applications
12.7 mm (1/2 ) and 15.9 mm (5/8 ) double-layer 41 mm (1-5/8 ) TYPE S-12 bugle head 4
gypsum panels to steel studs and runners
39
Products
Selector Guide for Screws continued
1
Fastening Application Fastener used Fig(2)
Gypsum panels to 12-ga. (max.) steel framing
Multilayer gypsum panels and other 48 mm (1-7/8 ), 52 (2), 60 mm (2-3/8 ), 67 mm (2-5/8 ), 76 mm (3 ) 4
materials to steel studs and runners TYPE S-12 bugle head
Cement board to steel framing
DUROCK Brand Cement Board or Exterior 32 mm (1-1/4 ), 41 mm (1-5/8 ) DUROCK Brand Steel Screws 17
Cement Board direct to steel studs, runners
Rigid foam insulation to steel framing
Rigid foam insulation panels to steel studs 38 mm (1-1/2 ), 52 (2), 64 mm (2-1/2 ), 76 mm (3 ) TYPE 15
and runners; Type R for 20- 25-ga. steel S-12 or R wafer head
Aluminum trim to steel framing
Trim and door hinges to steel studs and 22 mm (7/8 ) TYPE S-18 oval head 7
runners (screw matches hardware and trim) anticorrosive-coated
Batten strips to steel studs 29 mm (1-1/8 ) TYPE S bugle head 1
in demountable partitions
Aluminum trim to steel framing in 6 mm (1/4 ) TYPE S bugle head 1
demountable and UTRAWALL partitions anticorrosive-coated
Gypsum panels to wood framing
9.5 mm (3/8 ), 12.7 mm (1/2 ) and 15.9 mm (5/8 ) 32 mm (1-1/4 ) TYPE W bugle head 8
single-layer panels to wood studs, joists
Cement board to wood framing
DUROCK Brand Cement Board or Exterior 32 mm (1-1/4 ), 41 mm (1-5/8 ), 57 mm (2-1/4 ) DUROCK Brand 18
Cement Board to wood framing Wood Screws, with anticorrosive coating
Resilient channels to wood framing
Screw attachment required for both 32 mm (1-1/4 ) Type W bugle head 8
ceilings and partitions 32 mm (1-1/4 ) TYPE S bugle head 1
For fire-rated construction 32 mm (1-1/4 ) TYPE S bugle head 1
Gypsum panels to gypsum panels
Multilayer adhesively laminated 38 mm (1-1/2 ) Type G bugle head 8
gypsum-to-gypsum partitions (not
recommended for double-layer 9.5 mm (3/8 ) panels)
Plywood to steel joists
9.5 mm (3/8 ) to 19 mm (3/4 ) plywood to steel 33 mm (1-5/16 ) TYPE S-12 16
joists (penetrates double thickness 14-ga.) bugle head, pilot point
Steel to poured concrete or block
Attachment of steel framing 2 mm (3/16 ) x 45 mm (1-3/4 ) acorn slotted 14
components to poured concrete HWH TAPCON Anchor
and concrete block surfaces
Notes: (1) Includes 25, 22 and 20-ga. steel studs and runners; metal angles; metal furring channels; resilient channels. If channel resiliency makes
screw penetration difficult, use screws 3 mm (1/8 ) longer than shown to attach panels to resilient channels. For other gauges of studs and
runners, always use TYPE S-12 screws. For steel applications not shown, select a screw length which is at least 10 mm (3/8 ) longer than total
thickness of materials to be fastened. Use anticorrosive-coated screws for exterior applications. (2) Figures refer to screw illustrations on page 40.
No. 1 Bit for trim and No. 2 Bit for bugle pan, wafer, CONDRIVE Tool/Bit for HWH TAPCON Anchors
pancake heads low-profile & oval heads Note: Hex-head bit not illustrated
40
Basic Types of Screws 鈥? Numbers refer to descriptions on pages 38-39.
#1 #2
#3 #4
#5 #6
#5 #7
#8 #9
#10 #11
#13
#12
#14
#15
#15
#16
#17
#18
41
Products
Specifications鈥? Screws
1
Length Type Head
Description mm in.
Base Screws 25 1 TYPE S bugle
29 1-1/8 TYPE S bugle
32 1-1/4 TYPE S bugle
41 1-5/8 TYPE S bugle
48 1-7/8 TYPE S bugle
57 2-1/4 TYPE S bugle
67 2-5/8 TYPE S bugle
76 3 TYPE S bugle
Specialty Screws 10 3/8 TYPE S pan
10 3/8 TYPE S-12 pan
13 1/2 TYPE S-12 pan
13 1/2 TYPE S-12 pancake
13 1/2 TYPE S-16 pan(1)
16 5/8 TYPE S-12 low-profile
19 3/4 TYPE S-4 hex washer(1)
22 7/8 TYPE S-18 oval(1)
25 1 TYPE S trim
25 1 TYPE S-12 trim
25 1 TYPE S-12 bugle
32 1-1/4 TYPE S-12 bugle
32 1-1/4 TYPE S bugle(1)
32 1-1/4 Type W bugle
32 1-1/4 TYPE S-12 pancake
32 1-1/4 TYPE S oval
38 1-1/2 Type G bugle
38 1-1/2 Type R wafer
38 1-1/2 TYPE S-12 wafer
41 1-5/8 TYPE S oval
41 1-5/8 TYPE S trim
41 1-5/8 TYPE S-12 bugle
41 1-5/8 TYPE S-12 trim
48 1-7/8 TYPE S-12 bugle
49 1-15/16 TYPE S-12 bugle, pilot pt.
51 2 TYPE S-12 bugle
51 2 Type R wafer
51 2 TYPE S-12 wafer
57 2-1/4 TYPE S trim
57 2-1/4 TYPE S oval
57 2-1/4 TYPE S-12 trim
60 2-3/8 TYPE S-12 bugle
64 2-1/2 Type R wafer
64 2-1/2 TYPE S-12 wafer
67 2-5/8 TYPE S-12 bugle
73 2-7/8 TYPE S oval
76 3 TYPE S-12 bugle
76 3 Type R wafer
76 3 TYPE S-12 wafer
95 3-3/4 TYPE S oval
TAPCON Screw 45 1-3/4 conc. hex
(1) Anticorrosive-coated
42
Screw Applications
Screw Size
and Length
Application (no. x mm (Inches))
25 mm (1 ) Bugle Head TYPE S 6x25.4(1)
Attaches 12.7 mm (1/2 ) or 15.9 mm (5/8 ) single-layer gypsum
panels and bases to steel framing.
29 mm (1-1/8 ) Bugle Head TYPE S 6x28.6(1-1/8)
Attaches 15.9 mm (5/8 ) gypsum panels and bases to
resilient channels or other steel framing,
also batten strips for demountable partitions.
32 mm (1-1/4 ) Bugle Head TYPE S 6x31.8(1-1/4)
Attaches 25.4 mm (1 ) coreboard to steel runners.
Attaches 12.7 mm (1/2 ), 15.9 mm (5/8 ) and 19 mm (3/4 )
gypsum panels and bases to wood studs.
41 mm (1-5/8 ) Bugle Head TYPE S 6x41.3(1-5/8)
Attaches double-layer gypsum panels
to steel framing.
51 mm (2 ) Bugle Head TYPE S 6x50.8(2)
57 mm (2-1/4 ) Bugle Head 6x57.2(2-1/4)
64 mm (2-1/2 ) Bugle Head 7x63.5(2-1/2)
76 mm (3 ) Bugle Head 8x76.2(3)
Attaches multiple layers of gypsum panels and
other compatible materials to steel framing.
32 mm (1-1/4 ) Bugle Head (Type W) 6x31.8(1-1/4)
Attaches 12.7 mm (1/2 ) or 15.9 mm (5/8 ) single-layer
gypsum panels, bases, or resilient channels to wood framing.
11 mm (7/16 ) Pan Head 6x11.1(7/16)
Attaches 25-ga. steel studs to runners. 7x11.1(7/16)
38 mm (1-1/2 ) Bugle Head-Laminating 10x38.1(1-1/2)
Temporary attachment of gypsum to gypsum.
41 mm (1-5/8 ) Trim Head 6x41.3(1-5/8)
57 mm (2-1/4 ) Trim Head 6x57.2(2-1/4)
Attaches wood trim to 20 to 25-ga. steel framing.
43
Products
Double Thread Screw Applications
1
Screw Size
and Length
Application (no. x mm (Inches))
Bugle Head 6x25 (1)
Attaches gypsum board 6x29 (1-1/8)
to 20 to 25-ga. 6x32 (1-1/4)
steel framing. 6x41 (1-5/8)
6x51 (2)
6x57 (2-1/4)
7x64 (2-1/2)
8x76 (3)
Drill Tip Screw Applications
Screw Size
and Length
Application (no. x mm (Inches))
Bugle Head 6x25 (1)
Attaches single-layer gypsum board to 6x29 (1-1/8)
steel framing up to 14-ga. 6x32 (1-1/4)
Bugle-Head 6x41 (1-5/8)
Attaches multilayer gypsum board 6x48 (1-7/8)
to steel framing up to 14-ga. 8x54 (2-1/8)
8x67 (2-5/8)
8x76 (3)
Pan Head 7x11 (7/16)
Attaches stud to runner up to 14-ga. 8x16 (5/8)
Hex Washer Head 8x13 (1/2)
Attaches steel to steel up to 14-ga. 8x16 (5/8)
8x19 (3/4)
8x25 (1)
Modified Truss Head 8x13 (1/2)
Attaches metal lath to steel 8x19 (3/4)
framing up to 14-ga. 8x25 (1)
8x32 (1-1/4)
Gypsum Board The design of nails has vastly improved since the relationship of wood
Nails shrinkage to nail popping was discovered. Nails have been developed
to concentrate maximum holding power over the shortest possible
length鈥攏otably the annular ring type nail which has about 20%
greater holding power than a smooth-shank nail of the same length
and shank diameter. However, under lengthy, extreme drying conditions,
such as a cold dry winter or in arid climates, resultant wood shrinkage
may cause fastener pops even with the shorter annular ring nail.
As with screws, specification of the proper nail for each application is
extremely important, particularly for fire-rated construction where nails
of the specified length and diameter only will provide proper
44
Hand pressure is
applied to panel as performance. When wood-frame gypsum panel systems are subjected
nail is driven.
to fire, nails on surface attain temperatures that tend to char the wood,
thereby reducing their holding power. Nails used in gypsum construc-
tion should comply with performance standards of ASTM C514. Nails
are not available from CGC.
Selector Guide for Gypsum Board Nails(1)
Total thickness of surfacing materials(3)
Fastener length mm 6.4 9.5 12.7 15.9 19.1 22.2 25.4 31.8 34.9 Approx Usage
Fastener description(2) mm in. in. 1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/4 1-3/8 kg/100m2 lb/1,000 ft2
32 1-1/4 X X X 2.20 4.50
Annular Ring Drywall Nail
12-1/2 ga.
35 1-3/8 X 2.44 5.00
6.35 mm (1/4 ) diam. head,
38 1-1/2 X 2.56 5.25
med. diamond point
41 1-5/8 X 2.81 5.75
32 1-1/4 X X X 2.20 4.50
Same as above except
7.54 mm (19/64 ) 35 1-3/8 X 2.44 5.00
diam. head
38 1-1/2 X 2.56 5.25
41 1-5/8 X 2.81 5.75
45 1-3/4 X 2.93 6.00
51 2 X 3.42 7.00
32 1-1/4 X X X 2.20 4.50
12-1/2 ga.
7.54 mm (19/64 ) diam.
35 1-3/8 X 2.44 5.00
head
38 1-1/2 X 2.56 5.25
41 1-5/8 X 2.81 5.75
Same as above except
6.35 mm (1/4 ) diam. head
14 ga. 35 (4d) 1-3/8 X 1.71 3.50
13-1/2 ga. 41 (5d) 1-5/8 X 2.20 4.50
13 ga. 48 (6d) 1-7/8 X 2.81 5.75
13-1/2 ga. 54 (7d) 2-1/8 X 3.66 7.50
(1) For wood framing 400 mm (16 ) o.c., nails 200 mm (8 ) o.c. for walls, 175 mm (7 ) o.c. for ceilings. (2) All nails treated to prevent
rust with joint compounds or veneer plaster finishes. Fire-rated assemblies generally require greater nail penetration; therefore, for
fire-rated assemblies, use exact nail length and diameter specified for rated assembly (see Fire Test Report). (3) In laminated double-layer
construction, base layer is attached in same manner as single layer.
45
Products
Adhesives 1
Drywall adhesives make an important contribution to gypsum panel attach-
ment where the finest room interiors are desired.Their use greatly reduces the
nail or screw fastening otherwise required, thus saving labor on spotting and
sanding, as well as minimizing nail pops and other fastener imperfections.
Joint Compounds
CGC鈥檚 line of Joint Compound includes both ready-mixed and powder
products in drying and setting (hardening) types. In addition to
conventional joint finishing and fastener spotting, some of these products
are designed for repairing cracks, patching, back-blocking, texturing and
for laminating gypsum panels in double-layer systems. Products comply
with ASTM C475.
Advantages Low Cost High-quality products reduce preparation time, save
application labor and prevent expensive callbacks.
Versatility Job-tested compounds are available in specialized types to
meet finishing requirements.
Safety Safe to handle and use; Refer to MSDS sheets for details.
Use of CGC joint compounds brings the important added advantage of
dealing with one manufacturer who is responsible for all components
of the finished walls and ceilings鈥攆ormulated in our laboratories, and
manufactured in our plants for maximum system performance.
General 1. CGC joint compounds are not compatible with and should not be inter-
Limitations mixed with any other compounds.
2. For interior use only except for the use of setting-type (DURABOND 90)
and lightweight setting-type (SHEETROCK 90/PRO-SET) Joint Compounds
with SHEETROCK Brand Exterior Gypsum Ceiling Board.
3. Not recommended for laminating except setting-type (DURABOND 90)
and lightweight setting-type (SHEETROCK 90/PRO-SET) Compounds and
CGC/SYNKO Brand Ready-Mixed Compounds鈥擜ll Purpose and Taping.
4. Protect bagged and cartoned products against wetting; protect ready-
mixed products from freezing and extreme heat.
5. Each compound coat must be dry before the next is applied (except
setting-type (DURABOND) and lightweight setting-type (SHEETROCK
90/PRO-SET 90) Compounds); and completed joint treatment must be
thoroughly dry before decorating.
6. Use only setting-type (DURABOND) 90 or lightweight setting-type (SHEETROCK
90/PRO-SET 90) with 85-130 min. hardening time, or setting-type
(DURABOND 45) or lightweight setting-type (SHEETROCK 45/PRO-SET 30) with
30-80 min. hardening time for treating joints of Water-Resistant Gypsum
Panels to be covered with ceramic or plastic tile.
7. With regard to the following products: CGC Lite, CGC X-tra Lite; SYNKO
Lite Line-A/P, Taping and Finishing; and SYNKO Classic-A/P, Taping and
Finishing鈥? If smoothing by dry sanding, use nothing coarser than 150
grit sandpaper or 220 grit abrasive mesh cloth.
46
8. For painting and decorating, follow manufacturer鈥檚 directions for materials
used. All surfaces must be thoroughly dry, dust-free and not glossy
before decorating. SHEETROCK Brand First Coat should be applied and
allowed to dry before decorating.
9. Gypsum panel surface should be skim coated with joint compound to
equalize suction before painting in areas where gypsum panel walls
and ceilings will be subjected to severe artificial or natural side lighting
and be decorated with a gloss paint (egg shell, semi-gloss or gloss).
10. If dry sanding is used to smooth the joint compound, avoid roughen-
ing the gypsum panel face paper.
11. Do not use topping compound for taping or as first coat over bead.
47
Products
1
Ready-Mixed CGC/SYNKO Joint Compounds are drying-type products which are vastly
Drying-Type Joint superior to ordinary ready-mixed compounds and are preferred for
Compounds consistently high-quality work. These vinyl-based formulations are
specially premixed to a creamy, smooth consistency essentially free
of crater-causing air bubbles. They offer excellent slip and bond, and
easy workability. Available for hand or machine-tool applications.
Limitation: must protect wet joints and container from freezing.
CGC All Purpose Joint Compound 鈥? 27 kg
Is a ready mixed joint compound. Used for complete finishing, also for
hand-applied simple texturing. Also recommended for laminating and
repairing cracks in interior plaster and masonry not subject to moisture.
With superior bond characteristics, it is the best all purpose for taping.
CGC All Purpose-Lite Drywall Compound 鈥? 23 kg
Is a premixed compound used for embedding CGC Drywall Tape, for fill-
ing and finishing gypsum panel joints, corner bead, trim and fasteners.
This compound features improved slip, lower shrinkage and provides a
superior final coat application. Other uses include: skim coating; repairing
interior surfaces such as plaster, gypsum panels and masonry not subject
to water.
CGC X-tra Lite Drywall Compound 鈥? 18 kg
Offers three exclusive advantages: up to 30% less weight, less shrink-
age and exceptional ease of sanding. Ideal for fill and finish coats.
Usually needs only two coats over metal. Use for laminating gypsum
panels in fire-rated construction, for coating interior concrete ceilings
and columns above grade, and for patching cracks in plaster. Also used
for applying textures.
MACHINE MUD鈩? Drywall Compound 鈥? 20 kg
MACHINE MUD is a ready mixed joint compound for taping. Designed pri-
marily for mechanical tool users, MACHINE MUD is also intended for hand
application. MACHINE MUD compound is formulated to be crater free,
requiring fewer passes to achieve a smooth surface. As a lightweight
product it is very easy to sand and has minimal shrinkage.
FORMULA 1鈩? Premium Drywall Compound 鈥? 23 kg
FORMULA 1 is a ready-mixed joint compound that provides superior resis-
tance to craters and 鈥渇ish eyes鈥?; excellent slip; easy application with
minimal effort; superior bond for taping; and an exceptionally smooth
finish. This lightweight formulation offers low shrinkage, less cracking
and easy sanding.
48
SYNKO Brand Ready- SYNKO Lite
Mix Drying-Type A lightweight drying type compound available as an all purpose or
Compounds a two-compound system utilizing a taping and a finishing product.
SYNKO庐 Lite Line All Purpose
鈥? Formulated for filling, finishing joints trims and surfaces of gypsum
board.
鈥? Easy sanding.
鈥? Minimum shrinkage.
鈥? Superior spreadability.
SYNKO Lite Joint
鈥? Formulated for embedding tape and paper faced metal trim.
鈥? Recommended for use as a skim coat material.
鈥? Good open time.
SYNKO Lite Finish
鈥? Formulated for loading and finishing joints trims and surfaces of gyp-
sum board.
鈥? Easy workability.
鈥? Smooth.
SYNKO Classic
A lightweight drying type compound that offers superior working
properties (spreadability) and reduced shrinkage.
SYNKO Classic All Purpose
鈥? Lighter weight.
鈥? Greater stability.
鈥? Reduced shrinkage.
SYNKO Classic Taping
鈥? Formulated for a strong tape bond and first fill coat.
鈥? Ideal for laminating.
SYNKO Classic Finish
鈥? Formulated for superior sandability and a smooth tight finish.
鈥? Very low shrinkage.
鈥? Great stability and more working time.
49
Products
Powder Setting-Type These setting-type powder products were developed to provide faster
1
Joint Compounds finishing of drywall interiors, even under slow drying conditions. Rapid
chemical hardening and low shrinkage permit same-day finishing and
usually next-day decoration. Features exceptional bond; virtually unaf-
fected by humidity extremes. Ideal for laminating double-layer systems,
particularly fire-rated assemblies, and for adhering gypsum panels to
above-grade concrete surfaces. May be used for surface texturing and
for filling, smoothing and finishing interior above-grade concrete. Also
used to treat joints in exterior gypsum ceiling board; as prefill material
for SHEETROCK Brand Gypsum Panels; for treating joints of SHEETROCK
Brand Gypsum Panels, Water-Resistant; treating fastener heads in
areas to receive ceramic or plastic tile.
SHEETROCK 20/45/90, SYNKO PRO-SET 30/90, weighs less than conven-
tional setting-type compounds for easier handling, faster application
and improved productivity on the job. Provides sanding ease similar to
a ready-mixed, all purpose joint compound. Offers varied setting times
of 20 to 30 min. (SHEETROCK 20); 30 to 80 min. (SHEETROCK 45, PRO-SET
30, FAST-SET); 85 to 130 min. (SHEETROCK 90, PRO-SET 90).
SYNKO FAST-SET is a chemically 鈥渟etting鈥? drywall filler which may be
used to fill deep voids in almost any interior wall surface or replace
鈥渄rying鈥? drywall filler where speed of construction is essential and heat
is limited. Stock must be rotated at least every 60 days. FAST-SET will
set up in 45 to 90 minutes.
DURABOND Provides the strongest joint bond of all setting-type com-
pounds. Available in two setting times to meet varying job require-
ments: 30 to 80 min. (DURABOND 45); 85 to 130 min. (DURABOND 90).
Ideal for embedding tape and fill beads in veneer plaster finish systems
when rapid drying conditions exist.
Setting-Type 1. Not to be applied over moist surfaces or surfaces likely to become
Joint Compound moist, on below-grade surfaces, or on other surfaces subject to moisture
Limitations exposure, pitting or popping.
2. DURABOND 45/90 is difficult to sand after drying and must be smoothed
before complete hardening.
3. Before using over new interior concrete surfaces, concrete should age
60 days or more.
50
Joint Compound Choosing the right joint compound for a specific job requires an under-
Selection standing of a number of factors: job conditions, shop practices,
applicators鈥? preferences, types of available joint systems, characteristics
of products considered and recommended product combinations.
Joint compound products are either 鈥楢ll-Purpose鈥?-will perform all
functions or named according to function, such as taping, finishing and
all-purpose. All-Purpose is generally a compromise of taping and finish-
ing and may be used as a simple hand-applied texturing material.
Lightweight All Purpose Joint Compound is also an all-purpose
compound, but is lighter, shrinks less and sands easier. Taping typically
performs as the highest shrinking, strongest bonding, hardest sanding of
the three compounds, and is used for embedding tape. Finishing usually
is the lowest shrinking, easiest applying and sanding of the compounds
for use in second and third coats; may occasionally be designed for
simple hand-applied texturing. Taping and finishing are usually designed
as companion products to give the highest quality workmanship.
Types of Joint All Purpose Ready-Mixed Compounds Good performance in all joint
Compounds finishing steps. Open-and-use convenience; save time and mistakes
in mixing, leading to minimum waste. Require minimal water supply at
the job. Ready-Mixed Compounds have the best working qualities of all
compounds鈥攅xcellent performance plus factory-controlled batch
consistency.
Two-Compound Systems Formulated for superior performance in each
joint finishing step. Separate taping compounds develop the greatest bond
strength and crack resistance. Separate topping compounds have the best
sanding characteristics, lower shrinkage and smoothest finishing.
These compounds do require heated storage. Should they freeze, they
can be slowly thawed at room temperature, mixed to an even viscosity
and used without damaging effect. However, repeated freeze/thaw
cycles cause remixing to become more difficult.
Powder Compounds Have the special advantage of being storable (dry)
at any temperature. If they are stored in a cold warehouse, however, they
should be moved to a warm mixing room the day before they are to be
mixed. Best results require strict adherence to proportioning of powder
and water.
Interior Texture Finishes
Texture finishes from CGC offer a wide variety of possible texture
patterns to provide distinctive interior styling. Fast, easy application;
quick drying. Hide minor surface blemishes to reduce surface
preparation needed. Save labor time to preserve job profits. All
products are non-asbestos containing.
Powder Texture Products
For both commercial and residential buildings, CGC/SYNKO Texture
Finishes complement or accent elements in your interior design
scheme. They are economical too. They often cost less to apply than
51
Products
paint because they go on more quickly and also hide minor surface
1
blemishes to reduce surface preparation time. These texture finishes
are designed for interior use only, and all are asbestos-free.
Texture Finishes have been tested for low Surface Burning
Characteristics when applied to minimum thickness of 3 mm (1/8 ) on
gypsum board. This is important in meeting code requirements for
fire-safety in institutional, apartment and public buildings.
The texture finishes are equally effective for new work or for
redecorating. They may be applied to a variety of surfaces such as
gypsum board, plaster, concrete, and metal. Proper preparation of
surfaces to receive texture finish is important, since it has been found
that most failures are due to neglected or inadequately prepared
surfaces. Special attention should be directed to eliminating surface
plane differences, particularly in areas containing large windows or
openings admitting natural light.
SHEETROCK Texture Finish 鈥? Medium or Coarse
Formulated with polystyrene aggregate to provide an attractive, simulated
sand-finish texture for ceilings. Bonds to new or old concrete, gypsum
panel, plasters and primed metal. Levels minor surface irregularities,
masks surface defects, and has superior crack-resistance for fissure
cracking in normal thickness. Dries to a crisp, white finish that may be
painted if desired. CGC First Coat Drywall Paint may be added to increase
whiteness and hardness. Surface Burning Characteristics: flame spread,
15; smoke developed, 5; fuel contributed, 5.
SYNKO SPAN-TEX
A non aggregated texture for spray application. Designed to provide the
largest variety of texture application and finishes.
SYNKO SNOW-TEX
An adhesive bound texture designed for spray application to interior.
SNOW-TEX provides a coarse aggregate finish. Surface Burning
Characteristics: flame spread, 5; smoke developed, 0; fuel contributed, 5.
SYNKO RUFF-TEX Ceiling Texture
RUFF-TEX is a medium aggregated texture designed for spray
application. Surface Burning Characteristics: flame spread, 0; smoke
developed, 5; fuel contributed, 10.
52
Ready-Mixed Texture Products
READY-TEXTM Wall and Ceiling Spray Texture is a vinyl formulation for tex-
turing interior, above-grade surfaces. Ideal where moderate to bold
texture patterns are desired. Designed for spray application over gyp-
sum panel, concrete, and most other interior wall and ceiling surfaces.
Formulated to create unique texture patterns such as spatter, spat-
ter/knockdown, and orange peel designs. Dries to a white surface but
should be overpainted when dry. Not washable unpainted.
SYNKO SPAN-LITE is a lightweight premixed spray texture for texturing
interior above-grade surfaces. Can be applied to gypsum board, con-
crete or brick (must be primed). Applied SPAN-LITE will produce a spatter
type finish.
Texture Finishes
Fine Aggregated Swirl Spatter
Medium Aggregated Orange Peel Spatter / Knockdown
Coarse Aggregated Crowsfoot Stipple
53
Products
CGC Textures and Finishes Products
1
Finish/Pattern CGC Texture Application Coverage Finish Coat Level
Product(s) Method of Paint
Coarse Aggregated SHEETROCK Texture Coarse S 1.5-2 m2/kg (8-10 ft2/lb) Not Required 3
SNOW Texture S 1.8-2.5 m2/kg (9-12 ft2/lb) Not Required 3
Medium Aggregated SHEETROCK Texture Medium S 1.5-2 m2/kg (8-10 ft2/lb) Not Required 3
RUFF TEX S 1.8-3.1 m2/kg (9-15 ft2/lb) Not Required 3
Fine Aggregated COVERCOAT T 0.6 m2/kg (2.7 ft2/lb) Not Required 4
COVERCOAT S 0.9 m2/kg (4.5 ft2/lb) Not Required 4
Crows Foot READY TEX S then B 1-2.4 m2/kg (5-11.7 ft2/lb) Topcoat Required 4
SPAN TEX S then B 2.7-3.7 m2/kg (13.6-18.1 ft2/lb) Topcoat Required 4
Swirl READY TEX S then B 1-2.4 m2/kg (5-11.7 ft2/lb) Topcoat Required 4
SPAN TEX S then B 2.7-3.7 m2/kg (13.6-18.1 ft2/lb) Topcoat Required 4
Stipple SPAN TEX S then B 2.7-3.7 m2/kg (13.6-18.1 ft2/lb) Topcoat Required 4
READY TEX S then B 1-2.4 m2/kg (5-11.7 ft2/lb) Topcoat Required 4
Orange Peel SPAN TEX S 2.7-3.7 m2/kg (13.6-18.1 ft2/lb) Topcoat Required 4
READY TEX S 1-2.4 m2/kg (5-11.7 ft2/lb) Topcoat Required 4
SPAN LITE S 2-3.1 m2/kg (10.1-15.1 ft2/lb) Topcoat Required 4
Spatter SPAN TEX S 0.9-2.3 m2/kg (4.5-11.36 ft2/lb) Topcoat Required 3
READY TEX S 1-2.4 m2/kg (5-11.7 ft2/lb) Topcoat Required 3
SPAN LITE S 2-3.1 m2/kg (10.1-15.1 ft2/lb) Topcoat Required 3
Knockdown SPAN TEX S then T 0.9-2.3 m2/kg (4.5-11.36 ft2/lb) HeavyTopcoat Req鈥檇 3
READY TEX S then T 1-2.4 m2/kg (5-11.7 ft2/lb) Topcoat Required 3
SPAN LITE S then T 2-3.1 m2/kg (10.1-15.1 ft2/lb) Topcoat Required 3
Primers and Paints
CGC First Coat Decorating problems such as 鈥渏oint banding鈥? or 鈥減ho-
tographing鈥? are usually caused by differences between the porosities
and surface textures of the gypsum board face paper or concrete on one
hand, and the finished joint compound on the other. CGC First Coat is a
flat latex basecoat paint-type product especially formulated to provide a
superior first (prime) coat over interior gypsum board, wood and concrete
surfaces.
In contrast to a sealer, CGC First Coat does not form a film that seals
the substrate surface. Instead, it minimizes porosity differences by
CGC First Coat providing a base that equalizes the absorption rates of the drywall
face paper and the finished joint compound when painted. CGC First
Coat also provides the proper type and amount of pigments and fillers,
lacking from conventional primers and sealers, that minimize surface
texture variations between the gypsum board face paper and the
finished joint compound.
CGC First Coat is designed for fast, low-cost application. Applies with
brush, roller or airless or conventional sprayer. Dries in less than 30
minutes under 22掳 C (72掳 F)/50% R.H. conditions. White finish is ready
for decoration in an hour. Not intended as a final coating鈥攊t should be
overpainted when dry. The product comes ready-mixed in 18.9L
(5-gal.) pails.
54
SHEETROCK庐 Brand Primer鈥揝urfacer, TUFF-HIDE
Description
SHEETROCK庐 Brand Primer-Surfacer, TUFF-HIDE is a dual-purpose vinyl
acrylic latex-based coating designed especially for interior application
over new drywall. In a single spray application it provides the same results
achieved using a typical two-step process of skim coating surfaces with
joint compound followed by a coat of primer. In a GA-214/ASTM C-840
Level 5 gypsum board finish, SHEETROCK Brand Primer-Surfacer, TUFF-HIDE
is used in lieu of a skim coat of joint compound and paint primer coat to
SHEETROCK Brand provide the highest quality drywall finish.
Primer鈥擲urfacer
In ceiling applications where a flat white finish is desired, SHEETROCK
Brand Primer-Surfacer, TUFF-HIDE can be left unpainted providing an
ideal final finish.
Paint Products
TEXTURE UNDERCOATS
SYNKO Roll-On
18.9L
鈥? For new drywall surfaces.
鈥? Dries to flat white finish.
鈥? Hand application with medium to long nap roller.
SYNKO Quick Dry
18.9L
A superior quality, fast drying undercoat specifically designed for spray
application to new drywall prior to texture. High solids for superior hide.
SYNKO Pro Spray-On
18.9L
Is an undercoat primer designed for easy spray application to new drywall
prior to texture. Provides excellent wet and dry hide.
PRIMER/SEALER
SYNKO T.I.P.S.
18.9L
T.I.P.S. is applied as a primer sealer for new drywall surfaces and as a
texture paint. Needs only one coat on new drywall prior to texturing.
55
Products
SURFACE EQUALIZER
1
SYNKO Pre-Coat
18L
Pre-Coat is a high performance base coat for superior results where
gloss or semi-gloss paints will be applied or where critical lighting con-
ditions occur.
CEILING PAINTS
TEXTURE FRESH
18.9L, 3.78L
Texture Fresh is specially designed to make old, stained, textured ceil-
ings and ceiling tiles look new again. It may be rolled or sprayed. Use
mineral spirits to clean up.
Interior Patch and Repair Products
Finished interior walls are subject to abuse and damage from time to time.
CGC has developed a line of repair products to deal with a variety of holes,
cracks, dents and abrasions. Many of these products may be found in retail
hardware and home center stores, in handy convenient sizes.
SHEETROCK 90 Easy sand repair compound. A setting-type compound,
when mixed with water, sets in approximately 90 minutes. Dries to a
durable sandable finish.
SHEETROCK 20 Easy sand repair compound. A setting-type compound,
when mixed with water, sets in approximately 20 minutes. Dries to a
durable sandable finish.
DURABOND 90 Repair compound. A setting-type compound, when mixed
with water, sets in approximately 90 minutes. Dries to a hard finish. Not
sandable.
SHEETROCK Brand Drywall Repair Clips Metal clips that provide for
ready attachment of a drywall patch to an existing wall. Use with
replacement drywall to repair larger holes.
Concrete Finishing Compounds
COVER COAT Compound A vinyl-base product, formulated for filling and
smoothing monolithic concrete ceilings, walls and columns located
above grade鈥攏o extra bonding agent needed. Sand can be added.
Easily applied with drywall tools in two or more coats. Dries to a fine
white surface usually making further decoration unnecessary. Not
washable unpainted. Also can be used for embedding tape, for first
coat over metal bead and trim, and for skim coating over gypsum
panels.
Limitation: Not to be applied over moist surfaces or surfaces likely to
become moist (from condensation or other source), on ceiling areas
56
below grade, on surfaces that project outside the building, or any area
that might be subject to moisture, freezing, efflorescence, pitting or
popping.
SYNKO Concrete Fill
A quick setting fiberglass plaster compound designed to fill deep
voids or cracks in interior masonry walls and ceilings.
鈥? Does not require bonding agents before application.
鈥? Recommended for filling and levelling cracks between pre-cast
concrete panels used for ceilings and walls.
SYNKO Concrete Seal
Designed to be trowelled over sand and dry interior concrete with
need for bonding agents. Concrete seal level and seals concrete prior
to the application of SYNKO texture spray.
鈥? Excellent workability.
鈥? Light weight.
CGC DURABOND and SHEETROCK Setting-Type Joint Compounds These
setting-type compounds are ideally suited to fill offsets and voids left
in concrete. They produce a hard finish in various shades of white.
Overpainting may be required.
Where deep fills are required, CGC DURABOND and CGC SHEETROCK
Setting-Type joint Compounds are especially recommended for the first
coat, then followed by COVER COAT Compound. This practice minimizes
check cracking.
Limitations: same as for COVER COAT Compound.
Reinforcing Tapes
From the originator of modern joint finishing, CGC reinforcing tapes
add strength and crack resistance for smooth concealment at flat joints
and inside corners. Two products鈥攂oth quickly and easily applied鈥?
are available for specialized uses: paper tape for treatment with joint
compounds; glass-fiber tape for veneer plaster finishes.
CGC/SYNKO Brand Joint Tape A special high-strength fiber paper tape
for use with CGC joint compounds in reinforcing joints and corners in
gypsum drywall and veneer plaster finish interiors. Exceptional wet and
dry strength; resists stretching, wrinkling and other distortions; lies flat
and resists tearing under tools. The wafer-thin tape is lightly sanded for
increased bond and lies flat for easy concealment on next coat.
Precision-processed with positive center creasing, which simplifies
application in corners; uniform winding provides accurate, trouble-free
attachment to angles and to flat joints.
Preferred for its consistent high performance in gypsum drywall
finishing, CGC/SYNKO Brand Joint Tape with SHEETROCK Brand Setting-Type
Joint Compounds is also used with veneer plaster finish systems.
CGC/SYNKO Brand Joint Tape provides added strength and crack-resis-
tance in drywall joint treatment; it is 52 mm (2-1/16 ) wide in 18.3 m
(60 ), 76.2 m (250 ) and 152.4 m (500 ) rolls. Approx. coverage:
121 m/100 m2 (370 ft/1000 ft2) gypsum panels.
57
Products
CGC/SYNKO Brand Joint
1
Tape is designed for both
embedding by hand (below)
and application with
mechanical taping tool (right).
Joint is covered with thin
layer of compound before
taping.
A joint treatment system (reinforcing tape and joint compound) must
provide joints as strong as the gypsum board itself. Otherwise, normal
structural movement in a wall or ceiling assembly can result in the
development of cracks over the finished joint.
Repeated joint strength tests conducted at the CGC Research Center
have shown that joints taped and finished with conventional fiberglass
leno-weave mesh tape and conventional joint compounds are more
prone to cracking than joints finished with paper tape and convention-
al joint compounds. This is because fiberglass mesh tapes tend to
stretch under load, even after being covered with joint compounds.
Permanent repair of these cracks is difficult. Accordingly, CGC does not
recommend using conventional fiberglass leno-weave mesh tape with
conventional ready-mixed, powder or chemically setting compounds
for general drywall joint finishing.
CGC Fiberglass Drywall Tape Made with a unique cross-fiber con-
struction to provide greater drywall joint strength than conventional fiber-
glass leno-weave mesh tapes. This self-adhesive tape goes on quickly,
eliminating the bedding coat. Smooth, finished joints are accomplished
in two coats by using CGC SHEETROCK or CGC DURABOND setting-type joint
compound for at least the first application. The setting-type joint com-
pound also provides the added bond to provide desired joint strength.
Second SHEETROCK Brand Joint Compound application can be either set-
ting-type or drying-type (ready-mixed or powder) joint compound. Tape
also is ideal for patching small holes and cracks.
IMPERIAL Brand Tape A strong, glass-fiber tape used in wood-frame
construction to conceal and reinforce joints and interior angles of
GRAND PRIX Brand Veneer Plaster Base prior to veneer plaster finishing
with IMPERIAL Brand Basecoat, IMPERIAL Brand Finish Plaster, DIAMOND
58
Brand Veneer Basecoat and DIAMOND Brand Interior Finish Plaster.
High-tensile strength glass fibers are woven into an open mesh, coated
with binder and slit to roll width.
The open weave of IMPERIAL Brand Tape provides excellent reinforcing
and keying of plaster to resist cracking. The glass fibers lay flat and
minimize stretching for wrinkle-free attachment without springback or
distortion. Spirally woven (leno) long strands and the binder coating
reduce edge raveling and fraying, and keep loose threads from
defacing finished surfaces. Tape flexes readily to permit fast
application to flat joints and corners. Available in:
Type P with pressure-sensitive adhesive backing. Selected for quick,
self-stick hand application; saves installation time and fastener cost.
Availability: Type P in 91 m (300-ft.)-rolls 51 mm (2 ) and 64 mm (2-1/2 )
wide; 12 rolls per ctn. Approx. coverage: 121 m/100 m2 (370 ft/1000 ft2)
gypsum base.
Glass-fiber IMPERIAL Brand Tape
is quickly applied鈥攕elf-stick
Type P by light hand pressure
and bonding with finishing
knife or trowel (right). Use of
Type P Tape cuts taping time
up to 50%, simplifies
embedding and saves
cost of staples.
Veneer Plaster Finishes
Veneer plaster finishes offer the opportunity to trim days from interior
finishing schedules and provide strong, highly abrasion-resistant sur-
faces. These products are designed for one or two-coat work over gyp-
sum bases or directly to concrete block or properly prepared monolith-
ic concrete. Formulated for hand or machine application (IMPERIAL Brand
Finish and DIAMOND Brand Interior Finish hand only), they provide a thin,
lightweight veneer that sets rapidly.
Conventional plaster is the best system to attain a uniform, monolithic,
blemish-free, smooth surface with excellent wear resistance. By contrast,
veneer plaster systems have large-size gypsum panels to improve speed of
59
Products
installation, while providing more monolithic, harder, abuse-resistant
1
surfaces than are achievable with drywall. Plaster thickness is reduced from
the standard 12.7 mm (1/2 ) associated with conventional plaster to a mere
1.6 mm (1/16 ) to 3 mm (1/8 ) using high-strength gypsum in the product
formulations. While RED TOP Keenes Cement-lime-sand provides the most
universal texture finish in two-coat application, IMPERIAL Brand Finish Plaster
and DIAMOND Brand Interior Finish Plaster provide better surface hardness
abrasion resistance and wearability. Ready for final finish in as little as
48 hours if completely dry. (See Comparing Plaster Systems in Appendix.)
Advantages Rugged, Abuse-resistant Surfaces High-strength IMPERIAL Brand
Plaster Finishes (20.7 mpa (3,000 psi) compressive strength) provide
hard, durable interiors that require minimum maintenance.
Quicker Completion/Faster Occupancy Veneer plaster finishes
apply rapidly, set fast, dry quickly to save days in finishing interior walls
and ceilings. DIAMOND Brand Interior Finish Plaster can be decorated in
24 hrs. (if completely dry) with breather-type paint or left undecorated
if desired.
Competitive Costs Veneer plaster finishes are easily applied and
cover more area per ton than conventional plasters. Joints and interior
angles are pre-set with the same veneer plaster finish that goes on the
walls and ceilings.
Easily Decorated Veneer plasters are readily finished in smooth-trowel,
float or texture surfaces. The hard, smooth surface is decorated easily
and economically with paint, fabric, wallpaper or texture.
When abraded 1000 cycles
Versatile A wide choice of assemblies is available to meet design
by 11 kg (25-lb.) weighted
requirements: Fire and sound-rated systems for wood or steel framing,
wire brush in laboratory test,
IMPERIAL Brand Veneer Plaster hard and abuse-resistant surfaces for high-traffic areas, and electri-
Finish showed virtually no
cally heated ceilings.
penetration鈥攑roof of out-
standing abrasion resistance.
Products IMPERIAL Brand Basecoat Plaster For use as a basecoat in two-
Available coat veneer application finished with proper lime or gypsum finishes.
Can be applied to either GRAND PRIX Brand Veneer Plaster Base, directly
to concrete block, or over USG Plaster Bonder on monolithic concrete.
Formulated as the basecoat for high-strength IMPERIAL Brand Finish
Plaster, gauged lime putty, DIAMOND Brand Interior Finish Plaster,
STRUCTO-GAUGE鈥攍ime鈥攕mooth trowel, or Keenes鈥攍ime鈥攕and float
finishes. Available in hand and machine-application formulations.
Complies with ASTM C587. Available in 22.5 kg (50-lb.) bags.
IMPERIAL Brand Basecoat Plaster
IMPERIAL Brand Finish Plaster For single-coat application composed of
scratch coat and immediate doubling back directly over special GRAND
PRIX Brand Veneer Plaster Base, glass-fiber tape or CGC Joint Tape or
setting-type joint compound (DURABOND 90 or SHEETROCK 90/PRO-SET
90). Also used over IMPERIAL Brand Basecoat Plaster in a two-coat
system. Available for hand application鈥攑rovides a smooth-trowel or
float or spray-texture finish ready for decoration. Complies with ASTM
C587. Available in 22.5 kg (50-lb.) bags.
IMPERIAL Brand Finish Plaster
60
Coverage鈥擨MPERIAL Brand Basecoat and Finishes
m2/ton (metric)(1) ft.2/ton
Product Gypsum base Masonry Gypsum base Masonry
IMPERIAL Brand Basecoat 335-435 275-370 3250-4250 2700-3600
IMPERIAL Brand (1-coat) Finish 360-410 not recommended 3500-4000 not recommended
IMPERIAL Brand (2-coat) Finish 330-370 330-370 3200-3600 3200-3600
(1) Coverage rounded to nearest 5m2 per metric ton.
DIAMOND Brand Veneer Basecoat Plaster Provides quality walls and
ceilings for residential construction where superior strength of IMPERIAL
Brand Basecoat Plaster is not essential. Offers superior workability, ease
and speed of application. Formulated to receive a variety of finishes.
Apply to GRAND PRIX Brand Veneer Plaster Base, concrete block or
monolithic concrete. Complies with ASTM C587. Available in 22.5 kg
(50-lb.) bags.
DIAMOND Brand Veneer
Basecoat Plaster
Coverage鈥擠IAMOND Brand Basecoat
m2/ton (metric)(1) ft.2/ton
Product Gypsum base Masonry Gypsum base Masonry
DIAMOND Brand Basecoat 410-510 360-460 4000-5000 3500-4500
DIAMOND Brand Interior Finish Plaster A white finish formulated for
hand application directly to GRAND PRIX Brand Veneer Plaster Base or over
CGC Plaster Bonder on monolithic concrete. Also suitable in a two-coat
system over IMPERIAL Brand or DIAMOND Brand Basecoat or a sanded gyp-
sum basecoat. Applied to a nom. 1.6 mm (1/16 ) thickness, this finish is
unaggregated for a smooth or skip-trowel finish; may be job aggregated
with up to an equal part by weight of clean, fine silica sand for Spanish,
swirl, float or other textures. Not recommended for use over portland
cement basecoat or masonry surfaces. Complies with ASTM C587.
DIAMOND Brand Interior
Available in 22.5 kg (50-lb.) bags.
Finish Plaster
DIAMOND Brand Interior Finish Plaster should be applied only to GRAND
PRIX Brand Veneer Plaster Base having blue face paper. Faded base
must be treated with USG Accelerator鈥擜lum Catalyst or USG Plaster
Bonder before finish is applied to prevent possible bond failure. See
page 209 for specific application instructions.
DIAMOND Brand Interior Finish Plaster is also suitable for use with electric
cable ceilings. Allows higher operating temperatures than with other
products, provides more heat transmission and greater resistance to
heat deterioration. Finish is job-sanded and hand-applied 4.8 mm
(3/16 ) thick to cover cable. A finish coat of the same material is applied
1.6 mm (1/16 ) to 2.4 mm (3/32 ) thick to bring the total plaster
thickness to 6.4 mm (1/4 ). Applied over GRAND PRIX Brand Base attached
to wood joists, to metal furring channel or suspended metal grillage, or
over USG Plaster Bonder directly to monolithic concrete ceilings (8 mm
(5/16 ) fill coat plus finish coat for 9.5 mm (3/8 ) total thickness.)
61
Products
Coverage鈥擠IAMOND Brand Interior Finish Plaster
1
Conventional walls and ceilings
Sand float finish Heavy texture finish
sanded 1:2(1) sanded 1:1(1)
Neat (Sand:DIF)(1) (Sand:DIF)(1)
Surface applied to m2/ton(2) ft.2/ton m2/ton(2) ft.2/ton m2/ton(2) ft.2/ton
GRAND PRIX Brand Veneer Plaster Base 610 6000 475 4660 355 3500
IMPERIAL Brand or DIAMOND 560 5500 440 4330 330 3250
Brand Basecoat
Sanded RED TOP Basecoat 510 5000 410 4000 305 3000
Monolithic concrete(3)(4) 560 5500 440 4330 330 3250
Veneer basecoat over 560 5500 440 4330 330 3250
monolithic concrete(3)
Electric cable heat ceilings
fill coat(5) 1/16 finish coat 1/16 finish coat
sanded 1:1(1) sanded 1:4(1) sanded 1:1(1)
Surface applied to m2/ton(2) ft.2/ton m2/ton(2) ft.2/ton m2/ton(2) ft.2/ton
GRAND PRIX Brand Veneer Plaster Base 235 2300 510 5000 330 3250
Monolithic concrete(3) 84 900 560 5500 418 4500
(1) Coverage based on one ton of aggregated mixture (combined weight of sand and DIAMOND Brand Interior Finish Plaster). (2) Coverage
rounded to nearest km2 per metric ton. (3) USG Plaster Bonder required. (4) Must be job sanded, minimum 1/2:1, sand to plaster. (5) Fill
coat over gypsum base is 4.8 mm (3/16 ) thick鈥攐ver monolithic concrete is 8 mm (5/16 ).
62
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