The manufacturer has updated its Ditra Heat product by adding a thin thermal break on the underside of the membrane, allowing the system to warm tiled floors up to 70 percent faster over concrete substrates. The first electric floor warming system with an integrated thermal break, the product directs heat to the tile, not to the subfloor. Like the old Ditra, TB is an all-in-one system that includes the membrane, heating cables, and thermal break in a single layer. schluter.com