R-21 Unfaced Fiberglass Batt Wall Insulation

Formaledehyde-free fiberglass batts designed for 2x6 wood-framed walls deliver R-21 thermal performance with sound control. Pre-cut 15-in x 105-in batts cover 76.56 sq ft per package and install easily by pressing between studs.

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Key Features:

• R-21 Thermal Performance: Boosts energy efficiency in 2x6 wood-framed walls
• Unfaced Design: No vapor barrier—ideal for adding to existing insulation
• Pre-Cut Convenience: 15-in x 105-in batts fit 8-ft walls with 16-in OC studs
• Durable and Safe: Will not rot or mildew; noncorrosive to pipes and wiring; formaldehyde-free
• Indoor Air Quality Certifications: GREENGUARD Gold and SCS Recycled Content certified; ENERGY STAR partner

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Specifications Table:

Specification	Details
Coverage Area (Sq. Feet)	76.56
Length (Inches)	105
Width (Inches)	15
Thickness (Inches)	5.5
Faced/Unfaced	Unfaced
Fits 2 x 4 Walls	No
Fits 2 x 6 Walls	Yes
For Use in Basements	Yes
For Use in Walls	Yes
For Use in Attics	No
For Use in Ceilings	No
For Use in Crawlspaces	No
For Use in Doors	No
For Use in Duct	No
For Use in Electrical	No
For Use in Floors	No
For Use in Garage Doors	No
For Use in Masonry	No
For Use in Plumbing	No
For Use in Vents	No
For Use in Windows	No
Formaldehyde Free	Yes
Framing Type	Wood studs
Insulation Type	Fiberglass
Maximum R-Value	21
R-Value per Inch	3.8182
Sound Barrier	Yes
Stud Spacing (Inches)	16
Vapor Retardant	No
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
Warranty	1-year limited
Package Weight (lbs.)	32.73
Bag Dimensions (L x W x D)	20 x 20 x 50
UNSPSC	11162400
Package Type	Multi-pack
Package Count	7
Multi-Pack Quantity	4
Total Package Quantity	28

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Frequently Asked Questions (FAQ):

Q: Can these batts be used in 2x4 walls?
A: No. They are 5.5-in thick and designed for 2x6 wall cavities.

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Q: Do I need a vapor barrier with unfaced batts?
A: Unfaced batts do not include a vapor barrier; use a separate vapor retarder if required by local code.

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Q: How much area does one package cover?
A: 76.56 square feet.

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Q: Are these batts suitable for basements?
A: Yes, they are approved for use in basements and walls, not attics or ceilings.

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Q: What are the dimensions of each batt?
A: 15 inches wide by 105 inches long, 5.5 inches thick.

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Quiet comfort with crisp, clean lines

These unfaced white batts slip seamlessly into 2x6 wall cavities, creating a hushed envelope that elevates everyday living. The pristine, uniform texture feels tailored—perfect for projects where performance meets minimalism. Pair with warm wood tones and matte black hardware to let the architecture sing while the insulation works quietly behind the scenes. It’s a subtle luxury: energy-smart comfort and refined acoustics, all in one.

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Upgrade your walls to R-21 performance—add Johns Manville batts today for quieter, more energy-efficient living.