I don't know why myself but it is a good question. It's for use on walls.
Is there a particular reason why you are not blowing behind netting? It's clear as day that when you blow behind netting you do a better job because you can kick the tires, so to speak. When blowing behind a wall of some kind you don't know where the soft spots are and you couldn't do anything about them even if you knew where they were.
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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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