R-11 Unfaced Fiberglass Batt Insulation (23 in x 93 in)

Johns Manville R-11 unfaced fiberglass batts deliver reliable thermal performance and added sound control for 2x4 wood-stud wall cavities. Pre-cut to fit standard 8-ft walls with 24-in on-center framing, they press-fit easily and can be added over existing insulation since there’s no vapor barrier.

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Key Features:

• Designed for Standard 2x4 Cavities: Pre-cut batts fit 24-in on-center wood-stud walls and standard 8-ft wall heights.
• Unfaced for Flexible Use: No vapor retarder, making it easy to add to existing insulation where appropriate.
• Thermal + Sound Performance: Helps improve energy efficiency while reducing sound transmission through wall assemblies.
• Easy Press-Fit Installation: Simple to install between studs; trim as needed around obstructions.
• Durable, Noncorrosive Fiberglass: Will not rot, mildew, or deteriorate and is noncorrosive to pipes, wiring, and metal components.

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Specifications Table:

Specification	Details
Insulation Type	Fiberglass
Faced/Unfaced	Unfaced
Maximum R-Value	11
R-Value per Inch	3.1429
Width (Inches)	23
Length (Inches)	93
Thickness (Inches)	3.5
Coverage Area (Sq. Feet)	237.66
Package Count	16
Total Package Quantity	64
Package Type	Multi-pack
Multi-Pack Quantity	4
Package Weight (lbs.)	37.08
Bag Dimensions (L x W x D)	20 x 20 x 50
Framing Type	Wood studs
Stud Spacing (Inches)	24
Fits 2 x 4 Walls	Yes
Fits 2 x 6 Walls	No
Sound Barrier	Yes
Vapor Retardant	No
Formaldehyde Free	Yes
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
Warranty	1-year limited
For Use in Walls	Yes
For Use in Basements	Yes
For Use in Crawlspaces	No
For Use in Ceilings	No
For Use in Attics	No
For Use in Floors	No
For Use in Doors	No
For Use in Windows	No
For Use in Garage Doors	No
For Use in Duct	No
For Use in Electrical	No
For Use in Masonry	No
For Use in Plumbing	No
For Use in Vents	No
CA Residents: Prop 65 Warning(s)	No
UNSPSC	11162400

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Frequently Asked Questions (FAQ):

Q: What wall framing is this batt sized for?
A: It’s sized for 2x4 wood-stud walls with 24-inch on-center stud spacing.

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Q: Is this insulation faced or unfaced?
A: Unfaced—there is no vapor barrier.

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Q: Can I add this over existing insulation?
A: Yes. Because it’s unfaced, it can be added to existing insulation where appropriate for your assembly.

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Q: How much area does one package cover?
A: One package covers 237.66 sq ft.

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Q: Does it provide any sound control benefits?
A: Yes, it’s rated as a sound barrier and is designed to help reduce sound transmission.

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Quiet comfort, beautifully concealed.

Think of this as the invisible layer that makes a room feel finished—warmer, calmer, and subtly more refined. These unfaced fiberglass batts slip into the architecture with a clean, no-fuss fit, supporting both thermal comfort and sound control behind the walls. Use them to turn bedrooms, offices, or media rooms into spaces that feel hushed and composed. It’s the kind of behind-the-scenes essential that elevates everyday living into something quietly luxurious.

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Upgrade your walls with R-11 unfaced fiberglass batts for an easy-fit boost in comfort, efficiency, and sound control.