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I'm in the process of building a workshop in my basement. I'm using 2" Rigid foam boards, glued and taped to the exterior walls.
I was going to use spray foam to seal the top and bottom of the boards. The plan is to than put up 2x4 walls in front of the foam,
and than drywall. I've read conflicting articles on using unfaced insulation in the 2x4 walls. Some say to use it, some say its
So, a few questions.
Is it necessary to fill the 2x4 wall with fiberglass insulation ? Would an option be to use 2x3's flat on the 2" foam, and not use
batts ? I need to leave room for electrical boxes, etc for the workshop.
Also, I was also going to fit foam along rim joists and wanted to know if those areas should also be covered with drywall, for fire
blocking purposes. The ceiling will probably remain open.
House was built in 1955, live in Rhode Island, which I believe is zone 5.
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