The first thing to do is leveling, using cement cementitious materials to operate, and the next step can be started only after leveling is qualified, so as to prevent leakage of waterproof coating due to uneven thickness.

Step 2 Determine the altitude

This is a very important process. After the vertical height is clear, the stable layer will find a certain gentle slope, lay a leveling layer, seal and waterproof the periphery of the floor drain, and lay a waterproof layer on the additional layer to carry out water storage experiments.

3, cleaning, screeding

When laying the main parts and pipelines, clear the surrounding sundries first, then support the formwork at the bottom of the slab, then sprinkle water to wet it, and finally pour fine stone concrete, compact, block and smooth it.