Better For Attic Insulation Fiberglass Or Cellulose

What does matter is the type of fiberglass or cellulose and how well it was installed.

Better for attic insulation fiberglass or cellulose.

Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall. A given sample of cellulose insulation will provide better thermal performance than an identically sized sample of fiberglass insulation. So what are the advantages and disadvantages of each of these. This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic.

Cellulose wins last update. Cellulose is more difficult to cheat than fiberglass. Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. Blown cellulose is typically the preferred choice of insulation for attics.

Cellulose has 38 better air infiltration than fiberglass. Per square inch of insulation cellulose has a higher r value than. When used in an attic space however both types of insulation are ineffective at air flow across the attic floor such as a strong gust of wind. If fiberglass batts become compressed losing some of their air pockets then this insulation may be more affected by air flow than cellulose which performs well regardless of density.

R values of fiberglass and cellulose insulation. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic.