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It is not necessarily the problem of floor drain, it may be that the water pipe joints in the wall are loose and leaking, and the most problematic problems in the waterproof structure are the corners of the wall and the edge of the floor drain pipe.
Based on the information you provided, I feel that it is likely to be a problem with the waterproof layer, or a problem with the toilet drain pipe, but it is certain that it is not a problem with the water pipe. Here's why: >>>More
Bathroom leakage, basically is the leakage, as we all know, the interface of the sewer pipe into the main pipe in each bathroom is in the next layer of households, if it is the main pipe interface leakage, then it can be seen directly downstairs, and the main pipe leakage, will not leak from your home. If you see a leak in the ceiling downstairs, then you can basically confirm that there is a problem with the waterproofing. The renovation company's claim is suspicious of sophistry.
There is generally only one possibility for the problem of floor drainage and water leakage, mainly because the waterproofing of the joint between the sewer pipe and the floor slab through the floor slab is not done well. Floor drains are generally not a problem. Even if it leaks, the water can only flow into the pipes. >>>More
The treatment method of floor drain leakage in the toilet is as follows. >>>More