Schluter®-DITRA-HEAT-DUO is a polypropylene membrane with a cut back stud structure and a special, 2 mm anchoring fleece laminated on the underside. It is a universal substrate for tile coverings, which serves as a bonded waterproofing, uncoupling, crack bridging, and vapour pressure equalisation layer and is designed for the attachment of the matching system heating cables for floor and wall heating. The special thermal barrier fleece, in addition to reducing impact sound, enables faster heating of floor and wall coverings.