The wrong "kind"?
Knowledgeable people have recommended simple bags of rolled fiberglass insulation (thank you Ethan Winer). I find no reports on using this particular Atticat product or any other fiberglass of this density (if indeed there are any others). I suspect it has not been used due to the established practice of using rigid fiberglass OC 705/703 because these products work well and are easy to manipulate. And plastic bags bearing images of the Pink Panther are ugly. But I don't care about ugly, and a lack of reported success does not mean higher density fiberglass is known to be "the wrong kind".
But it indeed might be the wrong kind. I am no acoustician. Hence the question. If someone has tried it, please let me know. If someone knows that fiberglass of this density will not work, please also let me know. I suppose at some density level compressed fiberglass will behave like a rock. It would be good to know if that begins to occur between 6 and 9 pcf.
Knowledgeable people have recommended simple bags of rolled fiberglass insulation (thank you Ethan Winer). I find no reports on using this particular Atticat product or any other fiberglass of this density (if indeed there are any others). I suspect it has not been used due to the established practice of using rigid fiberglass OC 705/703 because these products work well and are easy to manipulate. And plastic bags bearing images of the Pink Panther are ugly. But I don't care about ugly, and a lack of reported success does not mean higher density fiberglass is known to be "the wrong kind".
But it indeed might be the wrong kind. I am no acoustician. Hence the question. If someone has tried it, please let me know. If someone knows that fiberglass of this density will not work, please also let me know. I suppose at some density level compressed fiberglass will behave like a rock. It would be good to know if that begins to occur between 6 and 9 pcf.
