The more I learn about fiberglass, the less I like it.
1. Formaldehyde is in it. None in cellulose.
2. It looses 20% of its R-value @ 0 deg F, and cellulose doesn't
3. Blown in fiberglass is the worst, because the r value per inch varies greatly with density cellulose does not.
4 Blown in fiberglass doesn't settle, so the ONLY way to know the density is to measure it!!
5. Fiberglass has a lower R per inch than cellulose.
6. Fiberglass cost's more than cellulose.
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