This document, together with DIN 18560 (all parts), DIN EN 13318 and DIN EN 13813, applies to screeds on insulation layers (hereinafter referred to as floating screeds), which have to meet requirements for thermal and/or sound insulation must be fulfilled. As heating screeds (see 4.1), they also serve to accommodate the heating/cooling elements (e. g. pipes) for room heating/cooling in accordance with DIN EN 1264-4.