But what if you already have fiberglass insulation? Do you need to remove it before adding the new material, or can it stay in place? Adding loose-fill ... (measured in R-value) based on your ...

Looking for the best attic insulation? That answer depends on your definition of “best.” The best performing way to insulate an attic doesn't always align with the most cost-effective way.

Getting the attic insulation balance right can save on energy bills and improve comfort year-round. The effectiveness of insulation is measured by its R ... fiberglass batts over loose-fill ...