Meet the Owens Corning R-38 Unfaced Fiberglass Insulation Batts — a high-performance solution for heat and sound control that's easy to install for homeowners and builders alike. Made with natural ingredients and a formaldehyde-free formulation, it’s a safer, smarter choice for interior comfort and energy savings.

Key Features & Design

• R-Value: R-38 for strong thermal performance in roof/ceiling and interior/exterior walls.
• Unfaced insulation: flexible and versatile for vapor barrier decisions on-site.
• Framing compatibility: Sized for metal or wood framing; can be stapled or friction-fit.
• Easy installation: handle-friendly, trim with a utility knife, and straightforward to fit between cavities.
• Durable design: inorganic, non-corrosive to steel, aluminum, or copper; dimensionally stable and won’t decay or slump in the cavity.
• Environment & health: made with natural ingredients and a formaldehyde-free formulation—peace of mind for your home.
• Acoustic & comfort benefits: improves interior noise control while helping keep interiors cooler in summer and warmer in winter.
• Applications: suitable for roof/ceiling and interior/exterior wall applications; install in wood or metal framing cavities or between furring channels.

Available Sizes

• 10.25 in. x 15.5 in. x 48 in. — 41.33 sq ft per pack — 8 batts — K90 Wood
• 10.25 in. x 23.75 in. x 48 in. — 63.33 sq ft per pack — 8 batts — U99 Wood
• 12.5 in. x 16 in. x 48 in. — 42.67 sq ft per pack — 8 batts — W64 Wood
• 12.5 in. x 19.25 in. x 48 in. — 51.33 sq ft per pack — 8 batts — E63 Wood
• 12.5 in. x 24 in. x 48 in. — 64 sq ft per pack — 8 batts — W65A Wood