Is My Attic Insulation Is Cellulose Or Fiberglass

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.

Is my attic insulation is cellulose or fiberglass.

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. Pros and cons of loose fill fiberglass attic insulation. You can get to the same place with either material. Cellulose is more difficult to cheat than fiberglass.

Or 7 inches of cellulose. This problem has been successfully solved by installing fiberglass batt insulation over the top of loose fill or blown insulation. This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic. Cellulose has 38 better air infiltration than fiberglass.

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. When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding. The bottom line is that cellulose can burn but fiberglass will not support combustion. Recycled glass or sand that s melted and spun into fibers.

If you check with the cellulose insulation manufacturers association they ll assure you that cellulose is definitely your best choice for insulation. Cellulose forms a dense continuous mat of insulation in your attic.