the third floor luxury condomini- ums, and the fourth floor residential penthouse suites with an elaborate common area and patio space. Gwizdala’s team installed porce- lain and marble tile over concrete with sound-rated ceilings in all bathrooms, laundry rooms, entries and some kitchens. The Schluter® - DITRA-HEAT-DUO uncoupling membrane and floor warming sys- tem with integrated sound control and thermal break was used under all floor tiles. “DITRA-HEAT-DUO provided all the functions we need- ed in a single layer,” said Gwizdala. “This was critical for us because it reduced our labor, making it a more cost- effective solution than any other sound control system.” The membrane is relied upon for both uncoupling and sound control in all areas so it provides the per- formance results required throughout the building. By using the same mem- brane throughout, the team knew they would have con- sistent floor thickness in all tiled areas. Once the membrane was installed they had the flexibility to install heating cables only in areas where floor warm- ing was specified. In the bathrooms, membrane seams were sealed with Schluter® -KERDI-BAND for waterproofing. The bottom line Tile membranes have changed installation practices significantly by reducing assembly thickness, weight, and labor to produce high- performance applications and increased productivity. Membranes have evolved from single-function products to highly-innovative, multi-function solutions for virtu- ally any application. Consistent use of a single product or system can simplify planning, bidding, purchasing, and installation from project to project. In the bathrooms, DITRA HEAT DUO membrane seams were sealed with Schluter®-KERDI-BAND for waterproofing. FEATURE: Schluter Systems L.P. - the evolution of the tile membrane 42 TileLetter | May 2017