Cellulose Or Fiberglass Attic Insulation

Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall.

Cellulose or fiberglass attic insulation.

You can get to the same place with either material. Cellulose insulates better than fiberglass especially in very cold weather. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need. Or 7 inches of cellulose.

This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic. Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic. So what are the advantages and disadvantages of each of these. Cellulose forms a dense continuous mat of insulation in your attic.

Loose fill fiberglass seems to dominate attic insulation in new construction homes and has an r value of approximately 2 5 per inch. If you check with the cellulose insulation manufacturers association they ll assure you that cellulose is definitely your best choice for insulation. Attic insulation contrast compare. When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding.

Cellulose is more difficult to cheat than fiberglass. Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics. Pros and cons of loose fill fiberglass attic insulation. Recycled glass or sand that s melted and spun into fibers.

Thus creating a more energy efficient home. This allows the insulation to get into the small pockets and crevices that fiberglass wouldn t be able to. 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. 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.

Cellulose has 38 better air infiltration than fiberglass. Cellulose wins last update. Posted september 19 2019 by lewis insulation filed under attic insulation. Loose fill cellulose is relatively inexpensive yet still has an r value of about 3 5 per inch of thickness compared to fiberglass r value between r3 to r4 per inch.

Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass. The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. Don t let money fly out of your roof.