Mineral stone wool insulation batts are slightly better insulators than the off-the-shelf fiberglass batts sold at most lumberyards and home centers. Mineral wool batts for 2×4 walls have an R ...

Asbestos is a strong, natural mineral fiber that ... into fibers with air pressure. Rock wool is installed as loose insulation or as woven insulation batts. If your loose-fill insulation fits ...