Owens Corning R-21 Thermafiber Fire and Sound Guard Plus, 5.5 in x 16 in x 48 in (24 Packs)R 21 Thermafiber Fire & Sound Guard Plus Mineral Wool Batts (5. 5 x 16 x 48, 24 Packs) Owens Corning Thermafiber Fire & Sound Guard Plus mineral wool batts deliver R 21 thermal performance with exceptional sound control and fire resistance for residential and light commercial builds. Sized for 16 in on center framing, these 5. 5 in thick batts fit snugly in wall cavities for fast, precise installation. Key Features: Thermal + Acoustic Performance: R

R-21 Thermafiber Fire & Sound Guard Plus Mineral Wool Batts (5.5 x 16 x 48, 24 Packs)

Owens Corning Thermafiber Fire & Sound Guard Plus mineral wool batts deliver R-21 thermal performance with exceptional sound control and fire resistance for residential and light commercial builds. Sized for 16 in on-center framing, these 5.5 in thick batts fit snugly in wall cavities for fast, precise installation.

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Key Features:

• Thermal + Acoustic Performance: R-21 insulation with excellent sound absorption for quieter interiors.
• Noncombustible Mineral Wool: Resists fire, moisture, and mold; non-corrosive and non-deteriorating.
• Easy Fit Installation: Flexible batts cut cleanly with a serrated knife and expand for a snug fit.
• Versatile Applications: Ideal for interior/exterior walls, ceilings, basements, and crawl spaces.
• Code-Compliant: Class A interior finish; ASTM C665 Type 1 compliant.

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Insulation Type	Mineral wool batt
R-Value	R-21
Dimensions	5.5 in x 16 in x 48 in
Pack Count	24 packs
Batts per Bag	6
Coverage per Bag (5.5 x 16 x 48)	32 sq ft
Applications	Interior and exterior walls, ceilings, basement walls, crawl spaces
Key Properties	Noncombustible, moisture-resistant, non-corrosive, non-deteriorating, mold-resistant
Standards & Compliance	NFPA 101 Class A-rated interior finish; ASTM C665 Mineral Fiber Thermal Insulation for Buildings, Type 1 compliant
Installation	Measure and cut with serrated knife; squeeze and insert; release to expand for snug fit

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Frequently Asked Questions (FAQ):

Q: What framing is this size intended for?
A: The 5.5 in x 16 in x 48 in batts are designed for 2x6 walls with 16 in on-center studs.

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Q: How many batts per bag and coverage?
A: Each bag contains 6 batts; coverage for the 16 in x 48 in size is approximately 32 sq ft per bag.

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Q: Is it safe near heat sources?
A: Yes, the mineral wool is noncombustible and provides fire resistance; always follow local codes and manufacturer clearances.

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Q: Can I cut the batts to fit around obstacles?
A: Yes. Measure and cut with a serrated knife, squeeze to insert, then release to expand for a snug fit.

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Q: Where can it be used?
A: Use in interior and exterior walls, ceilings, basement walls, and crawl spaces.

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Quiet Strength for Expressive Walls

This mineral wool elevates the envelope with a calm, confident presence—delivering warmth and hush in one refined gesture. I love the dense, tailored profile that slips neatly into a 2x6 cavity, creating a serene backdrop for layered textures and bold art. Pair it with plaster-finish walls and pale oak to let acoustics breathe luxuriously. It’s a discreet essential that anchors a home in comfort and quiet glamour.

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Create a quieter, safer, more energy‑efficient space—add Thermafiber Fire & Sound Guard Plus to your cart today.