I have a problem I am looking for advice on. We have a shower that is in a relatively small and windowless room. As you can hopefully see from the pictures, the sides of the shower are tiled about 3/4s of the way up the wall at which point it changes to drywall (which the ceiling is too). Over a few months time mold starts to develop on the drywall. we clean it off with mold removal but it ultimately returns. We have a fan in the ceiling and turn it on when we take a shower but the mold shows up there anyway.
By now the paint on the ceiling seems to be cracking. I wonder if it wasn't a mistake for whomever set up this bathroom to use drywall--should they have tiled on the ceiling instead? What is the right way to fix this situation once and for all so there is no return of mold? If the answer is to tile and anyone has a resource that explains how to do so I would be grateful.