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Find him to repair it and ask for damages.
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Find a neighbor to explain the situation and discuss with him to repair it.
From the analysis of the picture, it should be that the waterproofing of the root node of the pipeline is not in place, and the water on the waterproof layer penetrates between the waterproof layer and the floor slab, and then seeps into the downstairs from the crack. >>>More
Only by knocking the tiles and digging up the waterproof layer and then re-doing the waterproofing can completely solve the fundamental problem. >>>More
It does not mean that there is no problem, it is recommended that you and the upstairs are looking for a professional decoration company.
1. First of all, knock out all the floor tiles and wall tiles about 30cm in the lower part of the wall. (Note: Knock before you knock.) >>>More
Is there a bathtub, if there is a bathtub, most of them are problems under the bathtub, many people encounter this problem, and finally smash the bathtub, and then redo the ground to waterproof, and then change it to a shower partition or shower room.