Meet Owens Corning Thermafiber Fire & Sound Guard Plus mineral wool insulation—designed to tame temperatures, dampen noise, and stand up to fire in residential and light commercial builds. If you’re tackling interior or exterior walls, ceilings, basement walls, or crawl spaces, this versatile insulation has your back (and your walls). Delivery pricing may vary by state (ID, MT, OR, WA), so choose the correct zone for accurate pricing.

Key Features & Design

• Material: Thermafiber mineral wool insulation that’s non-combustible for enhanced fire resistance.
• Energy-saving insulation to help manage indoor temperatures.
• Acoustic benefits: Exceptional sound and noise absorption for quieter spaces.
• Moisture-resistant, non-corrosive, non-deteriorating, and mold-resistant.
• Quick to cut with a serrated knife, easy to fit around obstacles, and designed to expand to fill gaps.
• Suitable for ceilings, floors, interior acoustics, interior walls, and exterior walls.

Sizes & Specifications

• 3.5" x 15" x 47" — 39.2 sq ft per bag; 8 batts per bag; Wood
• 3.5" x 16" x 48" — 42.67 sq ft per bag; 8 batts per bag; Steel
• 3.5" x 23" x 47" — 60.06 sq ft per bag; 8 batts per bag; Wood
• 3.5" x 24" x 48" — 64 sq ft per bag; 8 batts per bag; Steel

Installation Tips

• Measure & Cut: Fire & Sound Guard Plus insulation is easy to cut with a serrated knife for custom fitting around electrical boxes, pipes, duct-work, wiring, or between non-standard studs and joists.
• Squeeze & Insert: The material is flexible—simply squeeze the sides to compress and insert into the desired wall cavity.
• Release & Expand: Once in place, it naturally expands to fill the space, delivering a snug, custom fit.