DIY & Home Improvement

That stuff sucks. It's hardly water resistant and if WILL fail.

Stick with a cement based board like Durarock of Hardie Backer (both sold at Home Depot). I prefer the Hardie backer.

Use a sheet plastic vapor barrier over the studs. Drape the vapor barrier over the edge of the tub and install your wall cement board using recommended screws (not drywall screws). Trim the excess plastic protruding under the cement board. Fill the seams in with thinset and mesh (alkali resistant) tape.

You should be able to find your tile, grout AND thinset at Habitat. Last couple times I was in a Habitat store they hand tons of the tile and thinset. You will probably find the powdered thinset that requires mixing but the powdered is superior to the bucket pre-mixed thinset anyway (and cheaper). Heck, you can probably find a tub as well. And caulk (stick with 100% silicone).

Let us know how you make out.