Is Compressed Fiberglass Insulation Really a Problem?


Or is this just another myth in the world of building science?


I’ve been guilty of perpetuating a myth. Not long ago I wrote an article in which I said installing insulation, “cavities [should be] filled completely with as little compression as possible.” But is compression really such a bad thing? Here on, commenter Dana Dorsett wrote, “Compression of batts is fine (resulting in a higher R/inch due to the higher density) as long as the cavity is completely filled.”

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