Owens Corning Thermafiber Fire & Sound Guard Plus mineral wool insulation delivers exceptional thermal performance, sound control, and fire resistance for residential and light commercial projects. Designed for interior and exterior walls, ceilings, basement walls, and crawl spaces, it remains non-combustible, moisture-resistant, non-corrosive, non-deteriorating, and mold-resistant.

If you require delivery to ID, MT, OR or WA, please select that delivery zone as pricing and delivery to those states may vary.

Key Features & Design

• Versatile applications: interior and exterior walls, ceilings, floors, basement walls, and crawl spaces
• Thermal efficiency: energy-saving insulation designed to reduce heat transfer
• Sound control: exceptional absorption for quieter rooms and spaces
• Fire resistance: fire-safe mineral wool insulation that helps improve safety
• Durability: moisture-resistant, non-corrosive, non-deteriorating, and mold-resistant performance
• Easy installation: measure & cut with a serrated knife for custom fitting around electrical boxes, pipes, duct-work, wiring, or between non-standard studs and joists; then squeeze & insert, release & expand for a snug, gap-free fit
• Product applications: Ceilings; Floors; Interior Acoustics > Ceilings; Interior Acoustics > Floors; Interior Acoustics > Interior Walls; Walls

Available Sizes

• 5.5" x 15" x 47" — 29.37 Sq Ft per bag; 6 Batts per bag
• 5.5" x 16" x 48" — 32 Sq Ft per bag; 6 Batts per bag; Wood
• 5.5" x 23" x 47" — 45.04 Sq Ft per bag; 6 Batts per bag; Steel
• 5.5" x 24" x 48" — 48 Sq Ft per bag; 6 Batts per bag; Steel