Gypsum boards are applied depending on the substrate in different attachment types. In the thin-bed process on a level surface. With Perlfix-Batzen for unevenness up to 20 mm. With plate strips for unevenness over 20 mm. Prerequisite: stable, preferably level ground. With Knauf panels with V-milling corner formations or special room geometries can be executed with high-quality surface.