Feature: Tile brings warmth and quiet to oceanfront condominium a renovation, there was limited height available, meaning the floor cover- ing assembly needed to be kept as thin as possible. One membrane, multiple requirements Dobri selected Schluter® - Systems’ DITRA-HEAT- DUO membrane to meet the multiple requirements of the project. The one mem- brane combines uncoupling to prevent future tile crack- ing, floor warming with thermal break, and impact sound control – all in a single layer. The product choice was primarily driven by the sound-control require- ment. Laboratory testing document- ed in the product technical literature demonstrated the benefits of the membrane in reducing impact sound transfer to the space below. When tested according to ASTM E2179, a porcelain tile assembly including the membrane reduced the impact insu- lation class (IIC) of a bare concrete slab with no ceiling underneath by 20. When tested according to ASTM E492, the IIC of an 8˝-thick concrete slab with a porcelain tile assembly including the membrane was found to be 50. As those conditions very closely reflected the actual environ- ment for this project, this membrane was a logical choice. It was clear that the membrane would also meet the other project requirements in an elegant way. Surface movement joints were provided every 16˝ to 20˝ within the tile covering and matched to the grout color, so they blend seamlessly into the decor. Photo credit: DM Signature Remodeling. Heating cables were placed on bathroom floors to deliver warmth to all foot traffic areas while providing proper clearance around fixtures. 38 TileLetter | May 2018