I was going to install a bath fan in the wall in our bathroom. When I started to open up the wall to place the fan housing, I found that there is 2 layers of 1/2" sheetrock on the walls. This doesn't seem right to me. Since there has been no bath fan in the room, the paint is flaking off the walls in spots and off of the ceiling from the moisture. I have already decided that I am going to replace the sheetrock on the ceiling. Someone did a really shady job of patching an area on the ceiling where the upstairs bathroom had a leak. Anyway, based on what I found with the two layers of sheetrock, should I just rip it all out and take the room down to the studs and sheetrock the whole room? I know it would be easier to leave it and just repair the paint, but I want it to be right. I don't really like that there are two layers of sheetrock on the walls.