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Description
Mapei Mapeguard UM Underlayment Membrane (323 sq. ft. Roll)
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 on the most challenging substrate surfaces, such as young concrete and single-layer 3/4″ plywood floors, in both commercial and residential applications. 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:
- 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 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
- Light green, translucent color shows mortar coverage under membrane
- Reduced “roll memory” and unique tri-layer construction keep membrane flat
- Easy to cut with standard utility knife
- Chalk and laser lines easily visible on surface
- 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 (properly prepared interior only)
- Existing ceramic tile or stone (properly 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
