Bathrooms are exposed to significant levels of moisture. Splash water in the vicinity of showers and bath tubs and all water sources create water vapor that condenses on the walls and floor. Even minor mishaps such as an overflowing tub can release major amounts of moisture. Frequently the bathroom also contains a washing machine that may leak.
The challenge is to prevent moisture damage in the substrate.
Modern designs also favor floor-level showers, in which the shower water is not collected by a tray, but flows to a drainage point directly from the floor covering.
With Galus GBS Bathroom Fitters & Schlüter Systems Waterproofing You will avoid falling/crackes tiles and water on the bellow ceiling.