We own an older brick home and the bathroom has partial tile walls and tile floors. The problem is the paint on the walls peels and chips. We had a professional paint 4 years ago and we are back to the same problem. My husband installed a vent fan in the ceiling to help with moisture, but the problem is as bad as ever. Is there a procedure we should follow. Two walls in the bath are exterior walls, the worst peeling is in the shower. Any advice would be great!!