I'm digging into an old shower in our rental house and planning to replace the
classy vinyl walls (which were mortared directly onto plywood) with tile.
Here's what I'm imagining my process to be...please tell me what you think,
I'd love any advice! There are more questions within each step, too.

1) Rip out old caulk and vinyl. Keep plywood. (Ok to keep plywood?)

2) Cover ply with plastic vapor barrier. Is using Tyvek ok? I have lots
leftover from a home addition and would love to use it up. Should I attach
with staples? Is folding over the corners ok?

3) Deal with a flat "shelf" space that is about 4.5 ft up, across from shower
nozzle. The water doesn't spray directly onto it, but it will have water vapor
build up. Should I work to make it a slant?

3) Attach cement board. Cover gaps and seams with fiber mesh tape, using
thinset mortar.

4) Caulk cement board outer seams.

5) Tile using thinset mortar. Caulk outer seams. Grout. Seal.

Anything else?

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