Hello, I stumbled across your answer to other friends about a leak in the bathroom, I hope it s okay

Oh It's a little strange, let me help you analyze it, look at the situation you said, first of all, you can be sure that it is not the bathroom floor that is facing the water, the problem is on the wall, because the top surface of the bathroom downstairs and the surrounding walls are dry, and the problems of both of you are on the wall of the bedroom. So let me ask, do you have heating in your house? Is it underfloor heating?

If there is, it may be that the floor heating pipe in the bedroom is broken and leaking, but you say that it is September, and there should be no water even if there is heating in this season. Or is there a hidden water pipe passing through the bedroom, in short, I suspect that the problem is in the bedroom floor, or the wall of the bathroom, if there is a hidden water pipe in the wall of your bathroom, it is very likely to shade the entire wall and floor, because the inner wall of the bathroom has cement tiles so it is relatively difficult to permeate water, so only latex paint bedroom walls are easier to show. In the same way, a broken water pipe hidden in the wall downstairs will also reach your house upstairs.

Hope it helps.

The possibility of water seepage in the water pipe is relatively large, and it can pass the pressure test If it does not leak, it is not done well in the waterproof treatment Usually the waterproofing of the bathroom and the compartment is made higher.