The product is a bag of fiberglass, pretty tightly compressed and intended to be taken out of the bag and spread in the attic. No foil or backing. Its not a sheet or a roll or anything like that. Its unique feature is the high density as packaged. If absorbance increases with density (I believe it does), I am hoping that stacking these bags in a bass-heavy corner will be effective.
Shoot, I've heard of people using rolls of insulation still in the bags, and even trying to compress the rolls to increase density. In Atticat, we have pretty cheap and very dense fiberglass product on the Home Despot shelves. So I'm rooting for it.
Shoot, I've heard of people using rolls of insulation still in the bags, and even trying to compress the rolls to increase density. In Atticat, we have pretty cheap and very dense fiberglass product on the Home Despot shelves. So I'm rooting for it.