The Owens Corning R-21 Kraft Faced Fiberglass Insulation Batt is a flexible moisture-control solution designed for concealed applications between studs and joists. With a paper facing on one side, it acts as a vapor barrier and helps keep your home cooler in summer and warmer in winter—without turning energy savings into magic tricks.

Key Features & Design

• Sized for metal or wood framing. Can be stapled or friction-fit.
• Easy to handle and install. Trim and fabricate with a utility knife.
• Paper facing on one side provides a vapor barrier for moisture control in between studs and joists.
• Meets thermal specifications. R-Value: R-21
• Inorganic. Non-corrosive to steel, aluminum or copper.
• Dimensionally stable and will not decay or slump in the cavity. Improves interior noise control.
• Applications include roof/ceiling and interior/exterior wall installations and can be installed in wood or metal framing cavities or between furring channels.
• Easy to trim, cut, and fit for quick, clean installations. Pre-cut lengths available for faster projects.

Available Sizes

• 5.5 in. x 15 in. x 93 in. — 67.81 Sq Ft/Pack — 7 Batts Per Bag — IRN ME23 — Wood
• 5.5 in. x 15 in. x 105 in. — 87.5 Sq Ft/Pack — 8 Batts Per Bag — IRN BF65 — Wood
• 5.5 in. x 23 in. x 93 in. — 89.13 Sq Ft/Pack — 6 Batts Per Bag — IRN K55A — Wood
• 6 in. x 16 in. x 96 in. — 74.67 Sq Ft/Pack — 7 Batts Per Bag — IRN BF109 — Metal