What I usually end up doing is gluing everything together with Tremco (which is an acoustical sealant) with an overlap of about 2' and French seams, running the VB up the wall, gluing it in place and the spray foaming the wall from floor to band joist. It blows. I think if I had a house like this I'd put down poly and pour a slab over it.
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My project:
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Chipping away on a daily basis.
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You know you're an ecorenovator if anything worth insulating is worth superinsulating.
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S-F: "What happens when you slam the door on a really tight house? Do the basement windows blow out?"
Green Building Guru: "You can't slam the door on a really tight house. You have to work to pull it shut."
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