Just look at the threads here about the showers.

It's the same EXACT thing, and the same techniques will apply.

The only difference is you want size/shape "X" instead of whatever everyone else has done.

One tip: Make sure to slope the ceiling away from where anyone will be sitting or standing. Steam will condense on the ceiling and you don't want it dripping on you.

So I've got the final design for the steam room done. It will be 6 feet by 7 feet and 8 feet tall. I appreciate the advice about the sloped ceiling. Do you guys have any ideas on how the benches should work? I am also going to install a rain shower head in the center and use it as a shower some days.

I was thinking folding benches might work well. But I'm not sure if I should install permanent benches.

Also, I was planning on doing some sort of illumination wall using a stone or corian. Has anyone done that type of thing?

Like this?

Never heard of em. :-)

Other than the sloping of the ceiling, the only other thing, and this one is much more important-- is that the entire room must be one giant membrane envelope, and it goes further than that-- it must be vapor proof, as well as waterproof. Most roll-on membranes (including my beloved Hydroban) require the use of an additional vapor barrier behind the cement board (either poly or tar paper), and in my way of thinking, that negates all the pluses of using a topical waterproofing. The only roll-on/ trowel-on membrane that has enough of a perm rating that it can be used alone is Hydroment's Ultraset urethane waterproofing, which is a trowel applied membrane. Hands down, the best membrane (for MY money) for a steam shower or steam room is Kerdi. In fact, I'm doing a steam shower right now and that's the membrane being used. It's even going in curbless.

Exactly, that looks awesome! Thanks so much for the reply.