Pros and Cons of Loose-Fill Fiberglass Attic Insulation Loose-fill fiberglass seems to dominate attic insulation in new-construction homes and has an R-value of approximately 2.5 per inch.

Knowing what sort of insulation to use and where and how to install it for the best results can be tricky. We’re here to guide you through the process. Because warm air rises, the attic is the ...