My house lives on the fifth floor, and the top of the bathroom downstairs on the fourth floor is l

It is probably the water pipe originally embedded in the wall, the waterproof is done, and the surface is the problem, it may be the water pipe in the wall, aging and leaking.

If the two shared pipes are still negotiated.

The roof on the fourth floor is leaking, right, your bathroom has been re-waterproofed, so have you checked whether there is a problem with the pipes in the bathroom wall before, and the general situation is still leaking, so it may be these two reasons1The bathroom is still not up to standard 2There was a problem with the plumbing in the bathroom, and the problem of leaking water in the pipe was not solved, and the problem was not solved by simply re-waterproofing.

This is the phenomenon of the upstairs bathroom leaking downstairs! It's the responsibility of the upstairs, the waterproof layer upstairs is not done, and the downstairs will leak! It is recommended to make waterproofing from the new, and there will be no leakage if there is water leakage!

This depends on the situation, if it is a leak in the public pipe, the two families discuss to solve it, obviously the fourth floor will suffer. If the branch water pipe leading from the fifth floor is leaking, of course, the fifth floor is responsible for repairing it. In short, distant relatives are not as good as close neighbors, it is best to solve the problem, don't take the cost too seriously, calculate it too clearly, otherwise it will cause neighborhood disputes, and it will be very troublesome in the future.