Blown Cellulose vs Blown Fiberglass
Hello Everyone. I own a four family apartment building in St. Louis and I'm considering having insulation installed in the attic, first floor ceiling, and basement ceiling. I
The attic contains original R-9 (roughly) insulation. The first floor ceiling probably contains little to no insulation and I'm looking more for noise reduction. The basement double as garage parking for the tenants with existing unfinished drywall installed. There is no existing insulation underneath the drywall.
I've spoken to four different contractors and have received four similar but unique proposal bids. Three have proposed cellulose blown insulation. They would drill holes the size of door knobs throughout the existing ceilings and blow in the cellulose. One mentioned dense packing the cellulose.
Another contractor, whom one of my coworkers recommended and I consider trustworthy, suggested using blown fiberglass. Same technique as above. They would drill holes in the ceilings and blow in fiberglass. He said he prefers the fiberglass because it doesn't settle like cellulose. However, he said he would do whatever I like.
Does anyone have any advice? I feel like my head is spinning with these choices.
Posted Wed, 12/12/2012 - 22:04
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Since drywall has a permeance of 0.02 liter/sec - m at 75 PA is ever possible to have sheathing dry to the interior of the home?