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ROCKWOOL Comfortbatt R-13 is semi-rigid stone wool batt insulation sized 3.5 in. thick by 15-1/4 in. by 47 in. for 16 in. on-center wood stud walls. It is noncombustible per ASTM E136 and rates 0/0 flame spread and smoke development per ASTM E84, which sets it apart from fiberglass batts that need a separate fire-rated assembly. The friction-fit edges hold the batt in the cavity, and stone wool resists moisture and does not support mold growth the way organic materials can. It suits basement walls, interior partitions and sound-sensitive rooms; fiberglass batts cost less and mineral wool batts from other brands are the direct rivals on fire and sound performance.
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Owners and installers of ROCKWOOL Comfortbatt consistently praise the stiffness, the clean cuts and the quieter rooms it produces. Complaints center on the higher cost than fiberglass and the dust and itch during installation.
ROCKWOOL Comfortbatt R-13 is a stone wool insulation batt for 16 in. on-center wood stud walls. Each batt measures 3.5 in. x 15.25 in. x 47 in. It has the same 15.25 in. x 47 in. size as the R-15 wood stud batt.
The batt is made of semi-rigid stone wool with flexible edges. It is noncombustible per ASTM E136 and has a 0/0 flame spread and smoke developed rating per ASTM E84.
