Quality & Consistency... "It's in the bag."
Manufacturers of Green Seal Brand Insulation
7072 Snowdrift Road
Allentown, Pa 18106
Installing cellulose insulation is one of the best methods available for sound abatement. Cellulose’s density produces less voids, giving sound very limited space in which to travel. On a standardized basis foam and fiberglass provide an STC (Sound Transmission Class) rating of 37 to 39. Cellulose provides a higher rating of 44, resulting in less sound infiltration.
Cellulose "tightens" buildings better than fiberglass, fitting easily around pipes and electrical wiring. A Colorado University study has found that cellulose insulation is at least 36% better at eliminating air infiltration.