PROVA-FLEX® is a durable, lightweight uncoupling membrane that provides crack isolation protection to concrete or wood substrates. The underlayment consists of three layers: a top layer of woven polypropylene mesh, a central sheet of polypropylene, and a bottom layer of non-woven polypropylene. The top layer provides a mechanical bond between the cured thin set and tiles, and allows for the efficient spread of thin set mortar; the central layer includes hollow studs for holding modified thin set mortar; and the bottom layer, which is secured with a polyolefin-based adhesive, provides Shear Stress Control by neutralizing stress caused by substrate movement. This underlayment is lightweight and is an easy-to-install alternative to backer board.
- Made of three layers of polypropylene for mechanical bonding, vapor management and Sheer Stress control to neutralize stress caused by substrate movement
- Protects tiled floors from cracking as substrates move or settle
- 3.28 in. W x 82 ft. L (25 sq m / 269 sq ft.)
- Red primary layer with white fleece bottom layer
- The underlayment features a patented Shear Stress Control® system with nonwoven anchoring fleece to neutralize stress caused by movement in the substrate
- With lightweight functionality and the top scrim layer that provides the ultimate locking mechanism for mortar, fill the central layer studs with mortar in fewer trowel passes for quick and easy installation
- Lays flat and features strong structural integrity to protect against collapse under the weight of installer’s knees
- Achieved EXTRA HEAVY Performance Rating When Tested to ASTM C627
- Tile or stone can be installed immediately over PROVA-FLEX®
- Premium polymer-modified thin set mortar required for installation, no premixed mortar or mastic
