Fibreglass Vs Cellulose Attic Insulation

This is called wind washing.

Fibreglass vs cellulose attic insulation.

Cellulose wins last update. So what are the advantages and disadvantages of each of these. Because it is denser than fiberglass cellulose is much more resistant to wind washing. Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass.

Here are some details on the differences between these kinds of insulation. Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall. Dirty fiberglass batts have a significantly reduced r value. Cellulose has 38 better air infiltration than fiberglass.

Fiberglass batt or roll insulation r3 2. Batt insulation take time to read this column. Or 7 inches of cellulose. Cellulose is more difficult to cheat than fiberglass.

Blown in insulation requires a professional. You can get to the same place with either material. Air moving through a vented attic deposits dirt and dust into fiberglass batts. Thus creating a more energy efficient home.

Cellulose is green cellulose is made of 80 post consumer recycled newsprint. Attic insulation is accomplished with either fiberglass blankets batt or blown in insulation. Cellulose and fiberglass are the two most popular types of blown insulation and they each have some pros and cons. This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic.

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. Before choosing blown vs. Cellulose insulates better than fiberglass especially in very cold weather.

Cellulose and fiberglass have similar insulating values. The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. 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. Both cellulose and fiberglass insulation provide about the same level of insulating power or r value per inch with slightly different results based on the installation procedure.

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. Cellulose forms a dense continuous mat of insulation in your attic.