USG Durock Brand Uncoupling Mat - 355 sq. ft. Roll A waterproof underlayment membrane helps suppress the transfer of lateral movement in a subfloor to preserve the integrity of the tile installation. Features Roll size: 43" x 98' (1.1m x 30m) Provides uncoupling, waterproofing, and vapor management of the substrate Lighter, thinner alternative to 1/4" tile underlayment panels A low-density core helps keep the membrane flat during installation Rot-proof and resistant to solvents and alkalis Ceramic tile installation can take place immediately after the membrane is installed Approved for use with modified and unmodified mortars This mat is an LDPE film with a spun bond polypropylene non-woven fabric on the top side and a needle-punched polypropylene fleece on the bottom side Applications In interior and exterior* applications for both residential and commercial floors To renovate older floors to address existing in-plane cracks in the subfloor To diminish the transfer of stresses beneath the flooring associated with expansion and contraction between different substrate materials To protect in-plane lateral movement in industry-approved plywood or oriented strand board (OSB) floors from transferring to the finished floor Accelerate construction timelines requires installing tile over green concrete slabs before the recommended 28-day cure Suitable Substrates Concrete, lightweight concrete Tile backer boards such as USG Durock Brand Cement Board and Fiberock Brand Tile Backerboard Green concrete Exterior-grade plywood and APA Sturd-I-Floor, Exposure 1 OSB (interior use only) Gypsum underlayments such as USG Levelrock Brand Cement mortar beds, self-leveling underlayment, and leveling coats Properly prepared cement terrazzo (interior only) Radiant heat systems Properly prepared existing vinyl flooring such as VCT, LVT/LVP, and non-cushioned paper-backed/felt-backed sheet vinyl Conforms to ANSI A118.10 American National Standard Specifications for Load Bearing, Bonded, Waterproof Membranes for Thin-Set Ceramic Tile and Dimensional Stone Installation and ANSI A118.12 American National Standard Specifications for Crack Isolation Membranes for Thinset Ceramic Tile and Dimension Stone Installation Technical Data Thickness 1/8" (3mm) Seam strength >8 lbs/inch Breaking strength >170 psi Shear strength >50 psi Point load >1000 lbs Crack resistance No failure up to 1/8" opening Fungus and microorganism resistance No mold growth
