Fibreglass Vs Cellulose Attic Insulation

Fiberglass batt or roll insulation r3 2.

Fibreglass vs cellulose attic insulation.

Here are some details on the differences between these kinds of insulation. 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. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic. Cellulose and fiberglass have similar insulating values.

The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Cellulose forms a dense continuous mat of insulation in your attic. Fiberglass insulation blown in attic r2 2 r4 3. So what are the advantages and disadvantages of each of these.

Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall. Blown in insulation requires a professional. 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.

Batt insulation take time to read this column. Cellulose insulates better than fiberglass especially in very cold weather. Before choosing blown vs. You can get to the same place with either material.

Dirty fiberglass batts have a significantly reduced r value. Cellulose and fiberglass are the two most popular types of blown insulation and they each have some pros and cons. Attic insulation is accomplished with either fiberglass blankets batt or blown in insulation. 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.

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. This allows the insulation to get into the small pockets and crevices that fiberglass wouldn t be able to. Fiberglass insulation and cellulose insulation offer similar r values. Cellulose is more difficult to cheat than fiberglass.

This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic. This is called wind washing. Thus creating a more energy efficient home. Or 7 inches of cellulose.

Cellulose has 38 better air infiltration than fiberglass. Cellulose wins last update. Air moving through a vented attic deposits dirt and dust into fiberglass batts.