WEIGHT OF CELLULOSE INSULATION BLOWN-IN OVER …

The weight ratio per square foot of 8-1/2" of cellulose is usually .97 pounds per square foot. This should not cause a problem. I would recommend adding an R-40 which would bring you to the maxiumum insulation and the point of diminishing returns on your investment. An R-40 would be 11.15" with a rate ratio of approximately 1.29 per square foot ................
................