Fiberglass Insulation Vs Cellulose Insulation For Attic

Cellulose insulation is also chemically treated to resist fire insects and mold.

Fiberglass insulation vs cellulose insulation for attic. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic. Because it is denser than fiberglass cellulose is much more resistant to wind washing. Cellulose provides better sound insulation than fiberglass i e homes are less noisy with it. Thus creating a more energy efficient home.

Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Or 7 inches of cellulose. 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.

Cellulose insulation is considered green as it is made from recycled newspaper and requires less energy to manufacture than fiberglass insulation. Air moving through a vented attic deposits dirt and dust into fiberglass batts. This allows the insulation to get into the small pockets and crevices that fiberglass wouldn t be able to. Dirty fiberglass batts have a significantly reduced r value.

It has a better resistance to air flow and prevents the upward movement of air caused by temperature differences. Many fiberglass installers fluff the fiber with extra air so you don t get as much insulation as you re supposed to.