Fiberglass Insulation Vs Cellulose Insulation For Attic

Fiberglass is a suspected carcinogen.

Fiberglass insulation vs cellulose insulation for attic.

Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. Cellulose provides better sound insulation than fiberglass i e homes are less noisy with it. Dirty fiberglass batts have a significantly reduced r value. You can get to the same place with either material.

The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Or 7 inches of cellulose. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic. Assuming your current attic insulation is made from fiberglass and has a value of r 13 you d have to add roughly 10 inches of additional fiberglass to hit r 38.

Thus creating a more energy efficient home. This allows the insulation to get into the small pockets and crevices that fiberglass wouldn t be able to. Because it is denser than fiberglass cellulose is much more resistant to wind washing. This is called wind washing.

Cellulose insulation is considered green as it is made from recycled newspaper and requires less energy to manufacture than fiberglass insulation. Many fiberglass installers fluff the fiber with extra air so you don t get as much insulation as you re supposed to.