Blown Cellulose Insulation Vs Blown Fiberglass Insulation Attic

The higher the r value the more efficient it is.

Blown cellulose insulation vs blown fiberglass insulation attic. According to research done at the oak ridge national lab fiberglass loses up to 50 of its r value in very cold conditions. Cellulose resists blowing when installed fiberglass tends to blow around stick to the attic ceiling and drift. How are they similar and how are they different from blown fiberglass vs. Or 7 inches of cellulose.

Cellulose produces much less static than fiberglass. Cellulose is easier to keep out of bird blocks and air conditioner condensate pans. 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. Installation costs for blown in insulation costs around 2 a square foot where installation costs for batts is around 1 a square foot.

You can get to the same place with either material. With that said most homeowners agree that blown cellulose is slightly more efficient due to the face that it blocks more air than fiberglass. You can find high r value insulation produced in both fiberglass and blown cellulose. So what are the advantages and disadvantages of each of these insulation materials.

At 3 5 per inch of material the r value of blown in cellulose is 23 better per inch than fiberglass batts. 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. More consistent pricing from cellulose manufacturers than fiberglass.