Insulation Advice -1950s Garage
Hello, I have a 1950s one-car garage we are turning in to livable space by raising the floor and partitioning to create a home office and bathroom with utility closet. In removing the old thick plaster walls we found that the exterior walls of the garage have no proper sheathing or insulation. It is simply studs, a black felt paper with holes here and there (vapor barrier?) and then the exterior brick of the home. In zone 4, Nashville, TN.
Question is on the best way to insulate the exterior walls? Have come across a couple ideas from reading but want to be sure not to limit the bricks ability to dry and prevent any issues with moisture/mold. Added a couple photos for view of the cavities.
1. Install rigid foam in the stud cavities and seal with canned spray foam to create a sheathing of sorts; making it thick enough to fill the cavity or possibly supplementing with mineral wool to fill.
2. Remove the black paper and have closed cell foam sprayed against the brick to fill the cavity. Possible need for vapor barrier to interior side?
3. Just roll in fiberglass or mineral wool in to the cavities
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