Our home currently has one bathroom on the main level and one bathroom in the basement (which includes a sink, shower, and toilet). The floor in the bathroom has been painted with a gray paint that is peeling and flaking. I cut some vinyl flooring and laid it in there just to make it look a little less like a dungeon. After about 6 months, I pulled it up and found mold on the bottom. I want to redo the bathroom, but I don't want to put anything on the floor that will allow mold to grow under it. I was thinking tile would be a good option. Would that work? And do you apply thinset directly over the concrete floor (after removing the paint) and then the tile? Second question: The shower was built by the previous owners and it is not a standard size. Therefore, I cannot buy a shower base that will fit. Currenty, the floor is the same painted concrete which is a mess. I would like to put a liner in and then put in tile. Would this be a good idea? The drain is pretty much just a hole in the shower floor with a plastic cover. Can I get a new drain system to elevate the drain level with the tile?