Ground structure: The floor structure of the bathroom should be made of integral cast-in-place reinforced concrete slabs, or prefabricated reinforced concrete slabs, and reinforced concrete laps with a height of 120mm should be integrally placed around the wall (except the door).

Floor screed: cement mortar leveling layer, the general ratio of cement: sand = 1:2.5 ~ 3 (volume ratio), thickness should be 20 ~ 30mm, requires smoothing, calendering. The surface of the screed layer of cement mortar should be firm, clean and dry, and there should be no looseness, sanding and peeling. The cement mortar screed at the yin and yang corners should be made into a uniform smooth rounded corner with a radius of 10mm, so that the paint is evenly applied and the thickness of the coating is uniform to avoid excessive thinning or accumulation.

Ground waterproof layer: The waterproof layer of the bathroom floor can be paved with asphalt waterproofing membrane, waterproof coating or cement-based waterproof layer on the cement mortar leveling layer to optimize the waterproofing of the coating film. The base treatment agent should be applied before painting or laying waterproof sheets.

Ground surface layer: It should meet the design requirements. It can be surfaced with 20mm thick 1:2.5 cement mortar, calendered, or ground floor tile. The drainage slope and slope direction are required to be correct. There should be no water and water accumulation, and the laying should be firm and the bees should be tight to form the first waterproof structure.  

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