Fiberglass Insulation Vs Cellulose Insulation For Attic

Cellulose has 38 better air infiltration than fiberglass.

Fiberglass insulation vs cellulose insulation for attic.

Posted september 19 2019 by lewis insulation filed under attic insulation. Cellulose forms a dense continuous mat of insulation in your attic. When using cellulose blown in dry insulation it requires a machine to achieve its purpose and a training session from wherever you rent the blower from. So what are the advantages and disadvantages of each of these.

Attic insulation keeps the desirable temperature in and the undesirable temperature out. Air moving through a vented attic deposits dirt and dust into fiberglass batts. Fiberglass insulation blown in attic r2 2 r4 3. Thus creating a more energy efficient home.

The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Cellulose wins last update. Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. When comparing blown in insulation both fiberglass and cellulose are nearly identical in price both costing around 0 70 to 0 80 per square foot for 6 inches of insulation.

You can get to the same place with either material. This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic. Cellulose is green cellulose is made of 80 post consumer recycled newsprint. 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.

The attic is one of the most essential areas of the home to ensure proper insulation in. Dirty fiberglass batts have a significantly reduced r value. Because it is denser than fiberglass cellulose is much more resistant to wind washing. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic.

Don t let money fly out of your roof. This is called wind washing. 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. Attic insulation contrast compare.

Cellulose is more difficult to cheat than fiberglass. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation. Cellulose insulates better than fiberglass especially in very cold weather. Or 7 inches of cellulose.

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.