Cellulose Vs Fiberglass Blown In Insulation Attic

You can find high r value insulation produced in both fiberglass and blown cellulose.

Cellulose vs fiberglass blown in insulation attic.

Or 7 inches of cellulose. When should you use blown in attic insulation for your home. 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 is easier to keep out of bird blocks and air conditioner condensate pans.

At 3 5 per inch of material the r value of blown in cellulose is 23 better per inch than fiberglass batts. With that said most homeowners agree that blown cellulose is slightly more efficient due to the face that it blocks more air than fiberglass. Installation costs for blown in insulation costs around 2 a square foot where installation costs for batts is around 1 a square foot. Cellulose produces much less static than fiberglass.

Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch. Another major weakness of fiberglass insulation which does nothing to stop air from passing through it. Both fibreglass and cellulose are the two most inexpensive insulation products that you could use. Fiberglass insulation contains billions of tiny glass fibers which contain trapped bubbles of air.

It is made of shredded paper plus a fire retardant chemical known as a borate. Fiberglass batts however are less expensive costing on average 0 30 to 0 40 a square foot for 6 inches of insulation. Making cellulose a better choice for homes in northern climates. Fibreglass is perhaps the most common product available in the market for insulation outpacing its close competitor cellulose by 50 1.

Cellulose insulation includes cellulose cells that have natural insulating power. You can get to the same place with either material. The higher the r value the higher the performance with heat the insulation has. Cellulose has an r value of r 3 2 to 3 8 per inch.

Another important benefit from dense packed cellulose is its ability to limit air movement which cuts down on heat loss through convection. The paper is broken down into cellular fibers that provide insulation. What this basically means is the ability the insulation has to resist heat flow. Cellulose resists blowing when installed fiberglass tends to blow around stick to the attic ceiling and drift.

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. According to research done at the oak ridge national lab fiberglass loses up to 50 of its r value in very cold conditions. Blown fiberglass on the other hand is made up of very fine strands of glass and these tiny fibers are a carcinogen that can easily be inhaled into your lungs.