Adding Blown-in Fiberglass Insulation

Increasing the R-value of your attic insulation

Less dusty than cellulose, blown-in fiberglass increases R-value and installs quickly.

Watch Fine Homebuilding contributing editor Mike Guertin increase the R-valueMeasure of resistance to heat flow; the higher the R-value, the lower the heat loss. The inverse of U-factor. in an attic from R-15 to R-40 with blown-in fiberglass insulation. Mike uses Owens Corning's AttiCat system to add approximately 9 in. of insulation between the attic ceiling joists. This short video includes tips on everything from safety gear to achieving an even distribution of fiberglass throughout the space.

To learn how Mike further sealed his attic, read Attic Insulation Upgrade.

Video by: Charles Bickford and John Ross

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May 5, 2015 6:10 PM ET

I'll take your money instead
by Kye Ford

Loose fill blown in fiberglass is a waste of time/money in most northern heating climates. It looses R value as temperatures drop. It is not dense enough to impede air flow. So instead of wasting your money blowing fiberglass in your attic, send your money to me I will spend it on something much more fun like a new sportscar. You can live vicariously though me and I'll even send you pics.

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