That’s because insulating it to the proper R ... fiberglass batts. To maximize headroom, while properly insulating your attic and ventilating the roof, use a combination of dense batt insulation ...

Mineral stone wool insulation ... shelf fiberglass batts sold at most lumberyards and home centers. Mineral wool batts for ...

It can still be found in old homes and needs special insulation removal methods. Carefully roll or lift fiberglass batt insulation ... levels (measured in R-value) based on your climate zone.