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If the water pipe buried underneath is broken, it is necessary to dig out the ground and make it all over again. If it is water on the surface, it is enough to install the floor tiles from scratch.
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Re-pave the tiles in the bathroom so that there is a slope to the floor drain in all directions.
The water pipe is leaking, and you need to find out if it is repaired. >>>More
It should be bred and drilled out of the sewer, and it is recommended to spray insecticide and pour some insecticide into the floor drain
It is necessary to do a "waterproof layer".
Apply 2 to 3 layers of waterproof paint and leave to be applied. >>>More
Unless you know the location of the sewer pipe, you can't punch the hole.
Use cement leveling, and at the same time use glass water to make waterproofing on the cement surface, and finally the waterproof material is glued to the cement with a blowtorch, and the surrounding area should be higher than the floor tiles.