R-21 Thermafiber Fire & Sound Mineral Wool Batts (16 Bags)

Owens Corning Thermafiber Fire and Sound Guard Plus delivers high R-21 thermal performance with exceptional fire and acoustic control. These semi-rigid mineral wool batts fit 2x6 walls and are unfaced for versatility in interior and exterior applications.

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Key Features:

• Thermal + Acoustic + Fire Protection: R-21 mineral wool resists fire and dampens sound in 2x6 walls
• Easy to Install: Semi-rigid batts cut cleanly with a serrated knife and friction-fit between studs
• Durable and Moisture Resistant: Non-combustible, non-corrosive, and non-deteriorating mineral wool
• Eco-Conscious: Contains up to 70% recycled content (per ICC-ES verification)
• Project Coverage: Each bag covers 45.04 sq ft; 16 bags total 720.64 sq ft

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Insulation Type	Mineral Wool Insulation
R-Value	R-21
Form	Batt
Faced or Unfaced	Unfaced
Product Thickness	5.5 in
Product Width	23 in
Product Length	47 in (3.91 ft)
Pieces per Bag	6
Bags per Pallet	16
Cover Area Per Bag	45.04 sq ft
Total Coverage (16 bags)	720.64 sq ft
Compatible Install Surface	Plywood
Insulation Location	2x6 Wall; Interior & Exterior Walls
Bag Size	3.91 ft x 23 in x 19 in
Product Weight	41.29 lb
Pallet Dimensions (W x D x H)	48 in x 48 in x 92 in
Pallet Weight	660 lb
Pack Size	4
Number of Pieces	16 bags total
Insulation Features	Fire Block Rated; Non-combustible; Moisture-resistant; Mold-resistant; Non-corrosive; Non-deteriorating
Recycled Content	Approximately 70% recycled content (ICC-ES verified)
Warranty	3 Year Limited Warranty

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Frequently Asked Questions (FAQ):

Q: Is this insulation faced or unfaced?
A: Unfaced mineral wool batts.

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Q: What stud cavity does it fit?
A: Sized for 2x6 wood stud walls; each batt is 5.5 in. thick x 23 in. wide x 47 in. long.

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Q: How many pieces per bag and total coverage?
A: 6 pieces per bag covering 45.04 sq ft; 16 bags provide 720.64 sq ft total.

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Q: Is it fire resistant?
A: Yes, mineral wool is non-combustible (ASTM E136) and provides fire resistance.

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Q: Can it be used in damp areas?
A: It is moisture-resistant and mold-resistant (tested per ASTM C1338), suitable for areas like basements when properly detailed.

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Quiet Strength for Elevated Walls

This mineral wool batt wraps your rooms in a hushed, confident calm while holding warmth like a cocoon. I love its dense, architectural texture—precision-cut batts that friction-fit for a tailored wall. Use it behind luxe paneling or plaster to create a serene envelope for bedrooms and media rooms. It’s the invisible layer that makes everyday living feel effortlessly refined.

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Upgrade your walls with R-21 Thermafiber performance—add these 16 bags to your project and create a quieter, safer, more comfortable home.

Warranty

Installation