Question: what is the difference between blown in insulation and rolled insulation?
Answer: Blown Fiberglass Insulation. Blown fiberglass insulation is loose fiberglass that you spray using a special type of blower. ... Blown fiberglass insulation scores an R-value of 3.2 to 3.8, making it slightly less likely than rolled fiberglass to prevent the flow of heat into and out of your house.