In order to seal the shower properly, an installation box is embedded into the screed for the shower drain, and incorporated in the alternative seal using the sealing collar provided. The shower tray is mounted directly on the screed after it is sealed in accordance with regulations. That allows the floor tiles to be laid right up to the edge of the tray.
Note that the material thickness of the tile and adhesive must be at least 1.5 cm. The tiler does the preparatory work. The bathroom installation specialist completes the installation. This ensures a clear separation of the trade crafts. Installation of ultra-flat shower trays is eligible for subsidies from development bank KfW in Germany and nursing insurance funds.