Insulating a 1930s home with foam and fiberglass
I have gutted my bathroom of my 1930 cape cod and am looking to insulate from the inside.
I live in zone 5a, upstate NY
The house exterior is brick, with a gap between the brick and the exterior sheathing ( which is 8 inch boards)
My thoughts are this
If I just installed fiberglass the high amount of air leaking in from the outside shiplap will compromise the fiberglass. Soy idea was to install 1/2 inch foam between the studs , spray foam all edges to make an air seal, then install fiberglass. I understand compressing the fiberglass is not a good idea, but this is a small bathroom and building out the studs is not in the cards. Im afraid this method will create 2 vapor vapor barriers and trap moisture. I thought about using roxul or unfaced fiberglass, thoughts? Also filling the entire cavity with foam would be alottle expensive, I’m working with a tight budget. Thanks. Jason
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