Basement shower Rockwool
I’m looking to redo our basement bathroom. I live in pgh, PA. The house was built in early 60s. The basement bathroom is an 8’ x 6’ area with painted cinderblock walls and a cement ceiling and floor. (It actually sits right under our front steps – roughly). The entire bathroom sits underground. I’ve kept a hygrometer in this room for the past year and haven’t seen it go above 60% so it is a relatively dry room surprisingly.
I want to redo this bathroom. I’m in the process now of moving the shower drain which is all cast iron (as well as toilet and sink drains too – not fun). But I want to know what I can do regarding insulation. I know I will have to insulate. Issue is that I will need to run pex and Romex to fixtures and that will need to be outside of the walls. I was thinking of studding out the shower with wood studs (~30” x 60”) and putting Rockwool in between the studs and against the cinderblock. Since this is such a small space every inch matters.
Can I put Rockwool against cinderblock? Is that enough R value for the space? Since there will be a shower I know condensation and humidity are a factor. I’m going to put a vent in there as well. Should I put like a 1/2” or 3/4” rigid foam against floor and ceiling? We wanted to tile the floor.
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