Rockwool Comfortbatt R-30 Attic Insulation vs ROCKWOOL Safe'n'Sound

Buy Comfortbatt R-30 if you are insulating an attic or exterior wall and need thermal R-value. Buy Safe'n'Sound if you are soundproofing interior partitions or want fire protection in a wood-stud wall. Comfortbatt is a thermal batt; Safe'n'Sound is an acoustic and fire batt with little thermal rating. Both are stone wool with the same 15.25-inch width and 47-inch length, so they fit the same stud bays. Reviewers of both praise the friction fit and how cleanly stone wool cuts; owners of Safe'n'Sound consistently report a real drop in sound transfer between rooms.

• Choose the Comfortbatt R-30 if you are insulating an attic floor, cathedral ceiling or exterior wall and the goal is thermal performance.
• Choose the Safe'n'Sound if you are soundproofing interior walls, ceilings or floors between rooms, or want a non-combustible fire barrier in a wood-stud partition.