Mapeguard UM Underlayment Membrane - 54 sq. ft. (5 m²) Roll

Mapeguard UM Underlayment Membrane - 54 sq. ft. (5 m²) Roll by Mapei Mapei's Mapeguard UM is a lightweight uncoupling mat for use under ceramic tile and stone installations and can also work as a waterproofing and vapor-pressure-equalizing underlayment. This versatile underlayment membrane can perform in both commercial and residential applications on the most challenging substrate surfaces, such as young concrete and single-layer 3/4" plywood floors. The unique engineered tri-layered design of Mapeguard UM absorbs lateral stress from the substrate without transferring this force to the tile or stone, which maintains exceptional bonds. Features Dimensions: 39.4 in x 16.4 ft Prevents transmission of in-plane substrate cracks up to 1/8" (3 mm) Recommended for use with polymer-modified mortars Fast Track Ready - approved for use over young (green) concrete and mortar beds Time-saving: Embed membrane, then install tile immediately Engineered cavity design allows easy single-pass filling of the surface core with less mortar Uncoupling, waterproofing, and water vapor membrane up to 25 lbs. (11,3 kg) MVER and 100% relative humidity Compression resistance to support rolling loads Approved for radiant-heating applications The light green, translucent color shows mortar coverage under the membrane Reduced “roll memory” and unique tri-layer construction keep the membrane flat Easy to cut with a standard utility knife Chalk and laser lines are easily visible on the surface The mesh-fabric top layer makes it easy to fill cavities with mortar Suitable Substrates Concrete Cement mortar beds, self-leveling underlayment, and leveling coats Young (green) concrete Industry-approved exterior-grade plywood and APA Sturd-I-Floor, Exposure 1 OSB (interior, dry areas only) Approved backer units – see manufacturer’s installation guidelines Cement terrazzo (adequately prepared interior only) Existing ceramic tile or stone (adequately prepared interior only) Radiant-heat systems Existing, properly prepared vinyl flooring – vinyl composition tile (VCT), non-cushioned paper-backed/felt-backed sheet vinyl, luxury vinyl tile/plank (LVT/LVP) Epoxy terrazzo (with appropriate bond testing – interior only) Gypsum underlayment or lightweight concrete