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ROCKWOOL ComfortBatt R-13 is a stone wool batt sized for 2x4 walls on 16 in. centers: 3-1/2 in. thick, 15-1/4 in. wide, 47 in. long. It friction-fits into the stud bay and holds itself in place, so the cavity stays filled and the R-value stays even across the wall. Stone wool is non-combustible, water repellent and damps airborne sound, which makes it useful on interior partitions as well as exterior walls. Against fiberglass batts it costs more and is heavier, but it cuts cleanly, resists moisture and mold, and handles sound better.
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Owners and installers rate ComfortBatt highly for its firm friction fit, sound damping and moisture resistance. The common complaints are the higher cost than fiberglass and the weight and itch of handling it overhead.
ROCKWOOL ComfortBatt R-13 is a stone wool insulation batt. Each batt measures 3-1/2 in. thick by 15-1/4 in. wide by 47 in. long, sized for 2x4 framing on 16 in. centers. It comes compression packed, 12 pieces per pack, covering 59.7 sq. ft.
The batt friction-fits into the stud bay and holds itself in place. This keeps the cavity evenly filled and the R-value consistent across the wall. It cuts to size with a serrated insulation knife, so it can fit around boxes and pipe.
Stone wool is non-combustible and water repellent, and it resists mold and mildew. It also dampens airborne sound as well as insulating, so it works on interior partitions and exterior walls. It can be installed over wood framing in walls, ceilings, attics, floors, crawlspaces and basements.
