When too much moisture is trapped in your walls due to a roof leak or heavy rain, it tries to come out, and you may notice this when your paint or wallpaper suddenly starts peeling. This is because water affects their ability to stick to walls, says Reynolds Restoration Services. This can also cause swelling and an overall weakening of the structure of your walls, so if you notice the cause it needs to be addressed immediately.
After fixing the problem in the walls, you need to use PuroClean to determine if the exterior damage was just to the paint or if you need to replace the drywall as well. Is the drywall swollen or softened behind the paint? Then the damaged areas need to be cut out and filled in with new, waterproof drywall. Glidden recommends glossy paint designed for high humidity areas. When choosing new wallpaper, Wallpaper Boulevard recommends solid vinyl as it can withstand high levels of humidity in the air.