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Mapeguard UM

Underlayment Membrane for Ceramic Tile and Stone

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 or up to 24" (61 cm) on center with double-layer plywood subfloors. 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.

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FAQs

Can I pour leveler over Mapeguard UM and Mapeguard UM 35?

Self-levelers can be poured over Mapeguard UM at a 3/8" minimum over the entire area, but we do not recommend it for Mapeguard UM 35.

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Can I use mastic or a premixed adhesive to install Mapeguard UM or Mapeguard UM 35?

No, we require a polymer-modified mortar for installing the mat and the tile to the mat.

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Can I install wood or LVT over Mapeguard UM or Mapeguard UM 35?

We approve the installation of wood and LVT over Mapeguard UM, but it is not approved for Mapeguard UM 35.

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Can I install Mapeguard UM or Mapeguard UM 35 outside?

Mapeguard UM is approved for exterior applications with some limitations; please consult the Technical Data Sheet for details. Mapeguard UM 35 is not approved for exterior applications.

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Can I install mosaics over Mapeguard UM or Mapeguard UM 35?

Yes, mosaics measuring 2" x 2" or larger are approved.

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