Building Materials

R21 Unfaced Batt 5.5" x 15" - 68.71 Sq/Ft U89B

The Owens Corning R-21 Unfaced Fiberglass Insulation Batt is a preformed, flexible blanket insulation that is produced in R-values from 11 to 38. It is designed to fit between the studs and joists in your home and offers exceptional thermal and sound control performance. This insulation is formaldehyde free and can be used in walls, windows, and attics. It is also GREENGUARD certified.