1.9 is pretty good. Honestly you're probably in the clear. Getting any lower will cost more than you will save on just about any timeline. I should bring a blower door home from work one of these days to see where my house is at. Not that I really care. It will just be fun to know how much I will have tightened things up after the next round of improvements. For me, personally, the blower door is only good for two things
Appeasing inspectors, and
Pressurizing the house to test for leakage.
I suppose it has other uses. For example,if I had vermiculite 8n my attic I'd pressurise the house and vacuum it up instead of paying for remediation.
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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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