Fiberglass Insulation Vs Cellulose Insulation For Attic

Or 7 inches of cellulose.

Fiberglass insulation vs cellulose insulation for attic.

Cellulose provides better sound insulation than fiberglass i e homes are less noisy with it. It has a better resistance to air flow and prevents the upward movement of air caused by temperature differences. Cellulose insulation is also chemically treated to resist fire insects and mold. Thus creating a more energy efficient home.

Air moving through a vented attic deposits dirt and dust into fiberglass batts. Fiberglass is a suspected carcinogen. This allows the insulation to get into the small pockets and crevices that fiberglass wouldn t be able to. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic.

The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. This is called wind washing. Because it is denser than fiberglass cellulose is much more resistant to wind washing.

Dirty fiberglass batts have a significantly reduced r value. Many fiberglass installers fluff the fiber with extra air so you don t get as much insulation as you re supposed to.