I don t know where the water leaks in the bathroom on the third floor, and it drips to the second fl

First of all, you need to know what causes the water leakage, if it is a problem with the water pipeline, you can find a plumber and ask him to use a pressure test pump to test it; On the contrary, if it is not the cause of the water pipe, then it should be the problem of the waterproofing layer - for this, it is necessary to re-waterproof.

The third floor bathroom supervisor leaks water from the second floor bathroom, and the third floor should obtain the consent of the second floor owner to repair the supervisor from the second floor. The main pipe should be replaced if the main pipe is leaking, and the mortar should have no effect.

It's obvious that you are out, because your problems caused the damage to his house, and the neighbor who is good to talk to is okay... If you don't speak well, you need to pay for the rectification of lost work.

If the cement layer is leaking, at least the third floor is not waterproofed. If it is a gusset, there are water droplets on the PVC ceiling, it may be condensation, and it is necessary to see whether there is water in the cement layer on the roof.

a flooded stree