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Old 12-05-2017, 08:58 AM   #2
Tiger Mountain Tile Inc
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Join Date: Feb 2011
Location: Issaquah, Washington
Posts: 6,450
Hi Everitt it looks like this post has been missed.

For steam showers, my personal preference is for a sheet membrane that goes on the surface. Something like Nobleseal TS that is a vapor retarder and would stop moisture and vapor at the surface as opposed to in the wall cavity. This can be installed right over the mud walls.

But the way that you've outlined is acceptable also.

Are you going to put in the hvac grills rather than an exhaust fan?
Jim Upton
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