Our Back Bath Room

[glatt]

You probably know this, but if that shower is going to have tile walls, don't use sheetrock (or wax coated sheetrock known as greenboard.) Use Durock or Hardibacker. Only use sheetrock in dry areas of the bathroom. And put tar paper behind the Durock or Hardibacker to protect the studs. Lap the bottom of the tar paper into the shower pan so water that gets into the wall drains into the pan. Fasten the Durock or Hardibacker with epoxy coated screws.

shit, you probably know all this, so I hope you don't think I'm insulting your intelligence. But sheetrock and/or greenboard should never be used in a shower, except maybe on the ceiling.

[classicman]

Originally Posted by glatt

You probably know this, but if that shower is going to have tile walls, don't use sheetrock (or wax coated sheetrock known as greenboard.)

Wait a second here - I'm about a month behind Zip on my bath, but I thought the greenboard was specifically for bathrooms and "wetter" areas. I am not tiling and will be doing a one piece (hopefully) shower insert install. I need to replace some of the ceiling and top foot or two on the walls about the shower insert. I was planning on using the greenboard. Is that incorrect?

[glatt]

I have no experience with one piece shower units, but if it were my bathroom and I was installing a one piece unit, I'd follow the installation instructions that come with the unit so I don't void the warranty. If they don't address what to use for the top foot or two, I'd probably use concrete backer board, coated with a hard setting (plaster based) drywall compound that could give me a smooth paintable surface. Drywall/greenboard would probably be ok here too, since it will be exposed to the air and will dry quickly when it gets condensations and splatters on it. I'd use regular drywall on the ceiling.