Quote:
Originally Posted by MN Renovator
I think getting to 1ACH at 50 would be extremely hard for anything that isn't new construction.
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You can get to 1 ACH 50. It just takes some work. With enough spray foam you could do it pretty easily. You'd have to have access to the inside of you walls and all of you band joists and top plates though. Also doors and windows would need a great deal of attention. And like I said, if you get that tight you'll be ahead of everyone else even if you have no insulation at all.