Specification

surface should be skim coated with joint compound. This equalizes suction and texture differences between the
drywall face paper and the finished joint compound before painting. As an alternative to skim coating, or when a
Level 5 finish is required, use S h e e t r o c k t u f f h i d e
™
primer-surfacer.
Product Data Size: 1/4, 3/8, 1/2 and 5/8 x 48 wide; 8–14 long. 1/2 and 5/8 also available in 54 wide.
Weight: 1/4 – 1.2 lbs/sf; 3/8 – 1.4 lbs/sf; 1/2 – 1.6 lbs/sf; 5/8 – 2.2 lbs/sf.
Thermal Resistance “R”: For 1/2 thickness: 0.45 °F x ft.
2
x h/Btu (0.08 K x m
2
/W).
Thermal Coefficient of Expansion: Unrestrained: 40-100 °F (4-38 °C):
9.0 x 10
–6
in./in./°F (16.2 x 10
–6
mm/mm/°C) (16.2 µm/m/°C).
Hygrometric Coefficient of Expansion: Unrestrained: 5-90% r.h.
7.2 x 10
–6
in./in./% r.h. (7.2 x 10
–6
mm/mm/% r.h.) (7.2 µm/m/% r.h.).
Packaging: 2 panels per bundle.
Test Data Surface Burning Characteristics: Flame spread 15, smoke developed 0.
Maximum Frame Spacing Direct Application Panel thickness
(1)
Location Application method
(2)
Max. frame spacing o.c.
Drywall Construction
in. mm in. mm
Single-Layer 3/8 9.5 ceilings
(3)
perpendicular
(4)
16 406
parallel
(4)
16 406
1/2 12.7 ceilings perpendicular 24
(5)(6)
610
parallel
(4)
16 406
sidewalls parallel or perpendicular 24 610
parallel
(4)
16 406
5/8 15.9 ceilings
(6)
perpendicular 24 610
sidewalls parallel or perpendicular 24 610
Double-Layer 3/8 9.5 ceilings
(7)
perpendicular 16 406
sidewalls perpendicular or parallel 24
(8)
610
1/2 and 5/8 12.7 and 15.9 ceilings perpendicular or parallel 24
(8)
610
sidewalls perpendicular 24
(8)
610
(1) 5/8 thickness is recommended for the finest single-layer construction, providing increased resistance to fire and transmission of sound; 1/2 for single-layer
application in new residential construction and remodeling; and 3/8 for repair and remodeling over existing surfaces. (2) Long edge position relative to framing.
(3) Not recommended below unheated spaces. (4) Not recommended if water-based texturing material is to be applied. (5) Max. spacing 16 if water-based
texturing material is to be applied. (6) If 1/2 S h e e t r o c k
®
interior ceiling board is used in place of gypsum panels, max. spacing is 24 o.c. for perpendicular
application with weight of unsupported insulation not exceeding 1.3 psf., 16 o.c. with weight of unsupported insulation not exceeding 2.2 psf. (7) Adhesive
must be used to laminate 3/8 board for double-layer ceilings. (8) Max spacing 16 o.c. if fire rating required.
Compliance Meets ASTM C1396.
Submittal Job Name
Approvals:
Contractor Date
Manufactured by
United States Gypsum Company
550 West Adams Street
Chicago, IL 60661
800 USG.4YOU (874-4968)
usg.com
WB1473/rev. 1-07
© 2007, United States Gypsum Company
Printed in U.S.A.
Note
Products described here
may not be available in all
geographic markets. Consult
your U.S. Gypsum Company
sales office or representative
for information.
Notice
We shall not be liable for
incidental and consequential
damages, directly or indirectly
sustained, nor for any loss
caused by application of these
goods not in accordance with
current printed instructions or
for other than the intended use.
Our liability is expressly limited
to replacement of defective
goods. Any claim shall be
deemed waived unless made
in writing to us within thirty
(30) days from date it was or
reasonably should have been
discovered.
Safety First!
Follow good safety and
industrial hygiene practices
during handling and installation
of all products
and systems. Take necessary
precautions and wear the
appropriate personal protective
equipment as needed. Read
material safety data sheets and
related literature on products
before specification and/or
installation.
Trademarks
The following trademarks
used herein are owned
by United States Gypsum
Company or a related
company: du r a b o n d , ea S y
Sa n d , Fi r e c o d e , Sh e e t r o c k ,
tu F F hi d e .