Bathroom wall material selection problem

You said that the waterproof layer of your home is very good, and the exterior wall of the downstairs bathroom is moldy, you can see from the exterior wall whether the exterior wall you want to even have is moldy! If there is no problem with the exterior wall of your bathroom, then it should be the problem of your own bathroom downstairs (including weather problems), and the mold of the exterior wall may be due to the fact that the waterproof layer of the civil construction is not done!

No, you can only use PVC board or oak board and make the surface waterproof.

First of all, this must be directly related to waterproofing, if the waterproof is the best, it is impossible to seep water so quickly, and the tiles are estimated to be wasted, because it must be re-waterproofed, change the master, and must do a closed water test. Secondly, it is also related to the wall estimate, but the second-hand house is estimated to be relatively old, and the concept at that time was not very strong. However, you are purely the responsibility of the bricklayer, and you can be held accountable for making him compensate for the loss of tiles.

The alkaline appearance of the wall is mostly caused by long-term water seepage. A small part of it is caused by unqualified wall masonry materials.

It was when it was decorated, and the wires buried inside leaked. >>>More