There is wet water on the exterior wall of the bathroom, and the responsibility is upstairs or downs

The upper layer is leaking. If the height of the ground on this floor does not exceed 1m, it is generally caused by water leakage in this layer, and if the height exceeds 2m, it is generally caused by water leakage in the upper layer.

The house is a property right house bought by oneself, and the bathroom equipment and bathroom floor waterproofing are self-use, and the maintenance is maintained by the owner himself. The property is not responsible.

Of course, this is the responsibility of the upstairs, and the upstairs is responsible for the maintenance, but you have to actively cooperate with the construction. Fix it early, everyone has no worries.

First of all, make sure that it is not the responsibility of your home, if the upstairs neighbor has made modifications to the sewer pipe during the renovation, then the responsibility must be theirs, if not, then eighty percent is the responsibility of the developer. You can go to the property to inquire about the specific situation during the renovation.

Generally, the dam is built at the door, the water storage depth should be 20 30mm, and no leakage within 24 hours is qualified. The key is that the waterproofing around the floor drain must be done carefully.