Specification

Product Description The USG Durock Shower System Waterproofing Membrane is an innovative membrane that features
an oriented HDPE, cross-laminated core that provides strength and tear resistance at much thinner mil
thicknesses (12 mil), making it the most pliable, user-friendly membrane in the industry, with the least
amount of buildup at seams.
The USG Durock Shower System Waterproofing Membrane is one of the strongest, most tear-resistant
membranes on the market. And since it has the lowest perm rating of any load-bearing, bonded waterproofing
membrane when tested to ASTM E96 Procedure E (<0.075 perms), it is ideal not only for showers and other
wet areas, but for continuous-use residential and commercial steam showers.
The USG Durock Shower System Waterproofing Membrane meets the permeability rating requirement of 0.5
perms or less and can be used in steam showers/rooms in accordance with Tile Council of North America
(TCNA) 2013 Handbook for Ceramic, Glass, and Stone Tile Installation (SR613-13 and SR614-13).
Product Data
Sizes and Packaging
– 36 in. x 100 ft. (0.9 m x 30.5 m) roll
– 36 in. x 50 ft. (0.9 m x 15 m) roll
– 36 in. x 25 ft. (0.9 m x 7.5 m) roll
– 5 in. x 50 ft. (13 cm x 15 m) band
Product conforms to ANSI A118.10 American National Standard Specifications for Load Bearing, Bonded,
Waterproof Membranes for Thin-set Ceramic Tile and Dimension Stone Installation.
Availability Product is distributed throughout North America. Contact a United States Gypsum Company sales office or
sales person for additional information.
Composition and Materials USG Durock Waterproofing Membrane is an oriented, cross-laminated high density polyethylene film with
polypropylene non-woven fabric laminated on both sides.
Warranty and Materials Products and systems provided by United States Gypsum Company are warranted to be free from defects in
material and workmanship. Contact a United States Gypsum Company sales office for complete warranty details.
Installation Walls (including steam shower walls):
A. Select code-approved wall substrate suitable for wet areas.
B. Apply unmodified thin-set mortar (as specified in ANSI A118.1) to wall substrate using 3/16 inch x 3/16 inch
(5 mm x 5 mm) V-notched trowel or 1/8 inch x 1/8 inch (3 mm x 3 mm) square or U-notched trowel.
C. Embed USG Durock Waterproofing Membrane into the mortar using a finishing trowel or drywall taping knife
to remove air pockets and to ensure proper installation.
D. Overlap all adjoining sections of the membrane by a minimum of 2 inches (51 mm) using unmodified
thin-set mortar (as specified in ANSI A118.1). Alternatively, adjoining sections of USG Durock Shower
System Waterproofing Membrane can be abutted and then seamed with 5" (13 cm) wide USG Durock
Shower System Waterproofing Band.
Submittal Sheet
09250
USG Durock
™
Brand
Waterproofing Membrane
A pliable sheet-applied waterproof membrane and vapor retarder for use with USG Durock
™
Brand
Shower System
– Thin (12 mil) pliable membrane with minimal buildup at seams
– Extremely durable, yet easy to handle and install
– Low Perm Rating (<0.075) per ASTM E96 Procedure E
– Suitable for waterproofing floors, walls and countertops