The walls of the living room are moldy, and the floor tiles in the bathroom are falling off.

This one is frozen back from the outside, it's not good to clean it thoroughly, it's cleaned up this year, and it will appear next year, but it won't collapse. If you want to be beautiful, you can decorate it and block it.

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!

I heard that a pinhole glue injection machine can be used to inject waterproof paint into the leaking cracks from under the floor slab, and the water leakage problem can be completely solved.

Bathroom leakage to repair the leakage first, in the treatment of moldy wall, the wall mold is serious to shovel off the wall, re-match putty powder, add anti-mildew agent in the putty powder, with putty powder on the wall, in the paint when adding anti-mildew agent, the wall will not be moldy.

In the bathroom, the wall of the bedroom is waterproof and redone, and the polyurethane waterproof can be brushed twice.