Mapeguard UM is a premium-performance, lightweight, waterproofing and vaporpressure-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
UM absorbs lateral stress from the substrate without transferring this force to the
tile or stone, which maintains exceptional bonds.