Meet Owens Corning Flame Spread 25 Fiberglas Insulation—a flexible, preformed blanket designed for walls, floors, and ceilings that demand solid thermal performance with a tidy finish. It’s built to deliver dependable insulation across all sizes while keeping flame spread in check.

Key Features & Design

• R-Value: R-38
• Facing: FSK (foil-scrim-kraft) or PSK (poly-scrim-kraft); both act as vapor retarders and provide a neat, finished appearance
• Flame Spread: Flame Spread 25
• Sizes per Pack: 12 in. x 16 in. x 48 in. (42.67 sq ft, 8 sheets per pack)
• Sizes per Pack: 12 in. x 24 in. x 48 in. (64 sq ft, 8 sheets per pack)
• Thickness Range: 3.5 to 12 inches; produced in R-values from 11 to 38
• Performance: Excellent thermal control; effective acoustical performance; long-term performance and will not settle nor slump within wall cavities; excellent recovery characteristics
• Handling: Compression packaging speeds job site handling and installation; less dust than other fiberglass insulation products
• Applications: Wall, floor and roof/ceiling assemblies where the insulation will be left exposed, or where a low flame spread vapor retarder facing is required; concealed applications of assemblies for noncombustible construction; wood and metal framed assembly cavities, or attached to surfaces with impaling pins

Designed for durability and dependable performance, this insulation is a smart choice for both new construction and retrofit projects. If you want a neat finish, strong thermal control, and a calm workspace (yes, less dust helps), this Owens Corning solution has you covered.