1. Make sure to make a niche The toilets are prone to dense sewer pipes. You can use glass, brickwork and other materials to design the niches, which can make the walls more tidy and unified. 2. Wall excavation The general thickness of the niche is designed to be around 15-20cm, so the wall that needs to be excavated must be a non-load-bearing wall, and the thickness of the wall is not less than 25cm, so that it can be both safe and practical. 3. Make niches between the gaps Irregular spaces are prone to appear in the bathroom, such as the position of the gap, where a shelf can be used to form a niche, which is more convenient to take and place.