Cellulose Vs Fiberglass Blown In Insulation Attic

Fiberglass insulation contains billions of tiny glass fibers which contain trapped bubbles of air.

Cellulose vs fiberglass blown in insulation attic.

Another important benefit from dense packed cellulose is its ability to limit air movement which cuts down on heat loss through convection. Cellulose resists blowing when installed fiberglass tends to blow around stick to the attic ceiling and drift. 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 get to the same place with either material.

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 insulation includes cellulose cells that have natural insulating power. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation. Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch.

It is made of shredded paper plus a fire retardant chemical known as a borate. Both fibreglass and cellulose are the two most inexpensive insulation products that you could use. You can find high r value insulation produced in both fiberglass and blown cellulose. What this basically means is the ability the insulation has to resist heat flow.

The higher the r value the higher the performance with heat the insulation has. Cellulose produces much less static than fiberglass. Loose fill or blown cellulose insulation is manufactured primarily from recycled newspapers a very benign product so it poses virtually no ongoing health risk. Cellulose has an r value of r 3 2 to 3 8 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. Or 7 inches of cellulose. At 3 5 per inch of material the r value of blown in cellulose is 23 better per inch than fiberglass batts. The higher the r value the more efficient it is.

When should you use blown in attic insulation for your home. Making cellulose a better choice for homes in northern climates. Another major weakness of fiberglass insulation which does nothing to stop air from passing through it. Cellulose is easier to keep out of bird blocks and air conditioner condensate pans.

Fibreglass is perhaps the most common product available in the market for insulation outpacing its close competitor cellulose by 50 1. The paper is broken down into cellular fibers that provide insulation. More consistent pricing from cellulose manufacturers than fiberglass.