The substrate preparation must be carried out according to the relevant country-specific standards in the bathroom and wet area. This includes, among other things, the compensation of holes and unevenness, professional priming as well as proper surface and transition sealing and the sealing of all fittings.
Disassembly of sanitary items such as fittings, shower rails, etc. Thoroughly clean or degrease the surface and remove any mold or bacterial infestation. A primer must be applied to existing tiles. The renewal of the existing, flexible maintenance joint between the shower tray/bathtub and the tiled wall is also an absolute necessity.