The 3rd floor said that the top of the main bathroom was leaking and the sewer pipe was wet around i

There are two aspects, one is the leakage of the hot water pipe, the other is the water seeping from the brick joint or the sewer pipe has leakage, the water exists in the mortar layer under the tile, the water in it can also leak for a period of time, you can try to turn off the hot water for a day to see the leakage water below, whether it has become smaller or something, free of charge to provide professional technical advice on concrete waterproof leakage repair.

There is still residual water in the floor slab, PVC pipes, and voids in the cement fault, and the general waterproofing does not pay attention to this place.

Since the bathroom is out of use, there should be traces downstairs now, so let him touch it with his hands to see if it's dry.

But I think that if we want to cure the root cause, we still have to smash the sewer pipe to make it waterproof.

Under normal circumstances, after you stop using it, it will not leak immediately, there will be water, but there may also be traces of water leakage downstairs. But no matter what the reason is, your water leakage must always be solved, and it is recommended to find an expert in the relevant field or an engineering company to analyze and solve it.