Cellulose Vs Fiberglass Attic

So it seems to me the real debate.

Cellulose vs fiberglass attic.

This is called wind washing. The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Cellulose retains more of its r value through a wider range of temperatures compared to fiberglass. 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.

Cellulose wins last update. Cellulose insulation blown in wall r 3 8 r3 9. More comfortable and energy efficient. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation.

Cellulose insulation blown in attic r 3 6 r3 7. Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall. Blown cellulose is typically the preferred choice of insulation for attics. So what are the advantages and disadvantages of each of these.

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 fiberglass and cellulose insulation can be installed to completely fill the space inside of wall floor or ceiling cavity. Or 7 inches of cellulose. Compared to fiberglass cellulose is a superb air blocker.

Blown in cellulose homeowner benefits. Air moving through a vented attic deposits dirt and dust into fiberglass batts. Cellulose has an r value of 3 5 3 7 per inch where fiberglass has around 2 1 2 7 r per inch. Higher r value per inch.

Since cellulose is blown in it fills all the gaps crevices nooks and crannies in your attic unlike batts that can leave gaps. Cellulose insulates better than fiberglass especially in very cold weather. Properly installed they will both remain in place for the life of the home. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic.