Blown-in cellulose delivers a better R-value per inch than blown-in fiberglass. Cellulose settles in at R-3.2 to R-3.8 per inch, while blown-in fiberglass comes in at R-2.2 to R-2.7 per inch according to the Department of Energy’s Building America Solution Center. That means cellulose provides roughly 30 to 40 percent more thermal resistance per inch […]
