Mapeguard Underlayment Membrane 323 Sq Ft

Mapeguard UM is a premium-performance, lightweight, waterproofing and vapor-pressure-equalizing underlayment membrane that provides crack suppression for use under ceramic tile and stone installations, for both residential and commercial applications. It is designed to perform over challenging substrates, such as young concrete and single-layer 3/4" (19 mm) plywood subfloors with joist spacing of up to 19.2" (49 cm) on center. The unique engineered tri layered design of Mapeguard UMabsorbs lateral stress from the substrate without transferring this force to the tile or stone, which maintains exceptional bonds.

• Prevents transmission of in-plane substrate cracks up to 1/8"
• Recommended for use with polymer-modified mortars
• Time-saving: embed membrane then install tile immediately