Managing moisture in exterior shower wall
I am still working through all the details of our renovation project and, while I am happy with our planned wall assembly, there is one area that I could use some input.
In the master bath, one of the tiled walls for the shower stall will be on an exterior wall. As mentioned in my previous posts, our exterior walls have 1″ of foil faced rigid polyiso and can’t dry to the exterior. I am concerned about tiling and sealing this wall completely from the interior as it will not allow any breathing inward. Additionally, because it is in a wet environment, there is always the chance that, despite best efforts, water could get in.
Does anyone recommend venting this wall? Maybe drilling holes in the top plate and bottom plate to allow it to breath to the vented attic? Are there other methods I should consider? Since we will be opening it from the inside, all options are on the table. Unfortunately, moving the shower is the one option that would be a last resort.
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