![]() Here are the tools and materials needed to complete this phase of the project. ![]() Note: Schluter and Bostik generously donated the DITRA and the Ditra-Set Mortar for this project, enabling the development of this Pro-Follow guide. They’ve used DITRA extensively on many jobs and highly recommend it, especially over cracked concrete. Jim and Rich are professional tile contractors with decades of experience. This article was produced with the help of Jim and Rich from Diamond Tile located here in Baltimore, Maryland. Check out the installation handbook for even more information and certifications. DITRA can be used as a waterproofing membrane for vapor and moisture management, and to support / distribute heavy loads. For this project, the DITRA is being installed over radiant-heating element embedded in self-leveling mortar.ĭITRA is a versatile product and can do more than just provide an uncoupling membrane. It can be installed over a variety of substrates including plywood, OSB, existing vinyl, structural planks, and concrete. 1 m x 30 m), and it’s lightweight and easy to cut.ĭITRA is approved for use with ceramic, porcelain, and natural stone tile. DITRA is composed of a polyethylene (plastic) grid of square cavities, each with angled, dovetail cut-backs, and an anchoring mesh laminated to the backside. Schluter DITRA underlayment is an uncoupling membrane that allows the tile floor to move (in-plane) relative to the substrate, eliminating the major causes for cracked and delaminated tile. ![]() The tile assembly needs to be able to handle that which is why it’s important to incorporate an uncoupling membrane that allows for in-plane movement. For example, wood expands and contracts with seasonal changes. Stresses between the concrete or wood subfloor can still cause tiles to crack and delaminate and for grout joints to crumble. Even a perfectly level subfloor won’t guarantee a beautiful, long-lasting tile floor.
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