Schluter® DITRA-HEAT-DUO-PS ROLL 3'3" X 33' = 108 SFDITRA HEAT DUO PS combines all the benefits of the DUO membrane uncoupling, sound control, thermal break, and heated cable channels with a peel and stick backing that bonds directly to concrete. No thin set, no trowel, no curing wait. 108 sq ft roll peel, press onto clean concrete, and snap DITRA HEAT cables directly into the stud channels Integrated sound control layer reduces impact noise between floors important in condos, above garage