XPS when standoff walls in place?
I have a space I want to use in my basement there are walls in place with fiberglass batts and vapor barrier (plastic) in place no drywall.
I want to remove the batts and put XPS on the walls and joist area. I priced spray foam and it was over 3k.
Can I leave the 2x4 walls in place and add XPS in thin sheets behind the studs then put thicker XPS between the studs?
I will try to attach a photo if possible.
This room has heat vents but it is very cold and I can smell the neighbors fireplace 2 doors down so i must have air infiltration. I want to do the XPS/can foam in place in the joist area and caulk along the wall where the wall meets the block.
Kelli in AK