Yeah, below grade moisture management is a b@&*c. I have to run a dehumidifier in the summer to keep my house safe. Insulation next to below grade masonry is a temperamental situation. It might be ok if you had R 40 on the outside of every concrete surface with proper capillary barriers and so forth. But at that rate you are in the same boat as people super insulating above grade. I'd love to live in such a house but I think it's a lot cheaper and easier to build a house on grade or retrofit an existing one. The retrofit is the easiest and most effective option but maybe not the cheapest.
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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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