目前卫生间防水层多采用柔性防水，待设备管道安装完成后才进行施工，基层表面浮浆尘土难以清理干净，导致防水层与楼板基层粘结不好，不能共同承受外力，易被损伤。为此我们选用水泥砂浆刚性防水层，待楼板及其反沿混凝土终凝，强度达２５ＭＰａ后立即施工，可保证防水... At present, the waterproof layer of the bathroom is mostly made of flexible and waterproof. The construction of the pipeline is only completed after the equipment is installed. It is difficult to clean the dust on the surface of the base layer. As a result, the waterproof layer and the ground floor of the floor are poorly bonded, and cannot withstand external forces and are easily damaged. For this purpose, we use a rigid waterproofing layer of cement mortar to wait until the final condensation of the floor slab and its anti-edge concrete, and the construction will be carried out immediately after the strength reaches 25 MPa.