Cellulose Vs Fiberglass Attic

Or 7 inches of cellulose.

Cellulose vs fiberglass attic.

Fiberglass vs cellulose the pros and cons by comparison posted on mar 23 2017 there are many different types of insulation to use in your home s walls attic and basement but the two most types of insulation are fiberglass and cellulose. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic. More comfortable and energy efficient. Cellulose retains more of its r value through a wider range of temperatures compared to fiberglass.

So it seems to me the real debate. Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall. Air moving through a vented attic deposits dirt and dust into fiberglass batts. Cellulose insulation blown in wall r 3 8 r3 9.

Cellulose has an r value of 3 5 3 7 per inch where fiberglass has around 2 1 2 7 r per inch. So what are the advantages and disadvantages of each of these. Higher r value per inch. 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 insulates better than fiberglass especially in very cold weather. Blown in cellulose homeowner benefits. You can get to the same place with either material. Cellulose insulation blown in attic r 3 6 r3 7.

Compared to fiberglass cellulose is a superb air blocker. Cellulose wins last update. Blown cellulose is typically the preferred choice of insulation for attics. Since cellulose is blown in it fills all the gaps crevices nooks and crannies in your attic unlike batts that can leave gaps.

Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation. This is called wind washing. The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass.