R-15 Kraft-Faced Fiberglass Wall Batt Insulation

Kraft-faced fiberglass batts from Johns Manville deliver R-15 thermal performance and sound control for 2x4 wood-stud walls. Precut to 23 in x 93 in, this formaldehyde-free insulation includes a kraft vapor retarder and covers 103.97 sq ft per package.

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Key Features:

• Moisture Control: Kraft-facing provides an integrated vapor retarder to help manage moisture in exterior walls and basements.
• Thermal + Acoustic Performance: R-15 value improves energy efficiency while reducing sound transmission.
• Precut Convenience: Sized for 8-ft walls with 24-in on-center studs; 23 in W x 93 in L batts.
• Durable, Noncorrosive: Will not rot or mildew and is noncorrosive to pipes, wiring, and metal studs.
• Health & Safety Certifications: Formaldehyde-free, GREENGUARD Gold certified; contributes to better indoor air quality.

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Specifications Table:

Specification	Details
Coverage Area	103.97 sq ft
Length	93 in
Width	23 in
Thickness	3.5 in
Faced/Unfaced	Kraft faced
Fits 2 x 4 Walls	Yes
Fits 2 x 6 Walls	No
For Use in Attics	No
For Use in Basements	Yes
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 Walls	Yes
For Use in Windows	No
Framing Type	Wood studs
Insulation Type	Fiberglass
Maximum R-Value	15
R-Value per Inch	4.2857
Sound Barrier	Yes
Stud Spacing	24 in
ENERGY STAR Certified	Yes (program partner)
GREENGUARD Gold Certified	Yes
Formaldehyde Free	Yes
Vapor Retardant	Yes
Package Type	Multi-pack
Package Count	7 pieces
Multi-Pack Quantity	4
Total Package Quantity	28
Package Weight	49.7 lb
Bag Dimensions (L x W x D)	23.5 x 20 x 49 in
Warranty	1-year limited
UNSPSC	11162400

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Frequently Asked Questions (FAQ):

Q: How many pieces are in the package and what area will it cover?
A: There are 7 precut batts per package, covering a total of 103.97 square feet.

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Q: What wall framing is this intended for?
A: It’s designed for 2x4 wood-stud walls with 24-in on-center stud spacing in standard 8-ft wall heights.

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Q: Can this be used in basements or ceilings?
A: It’s suitable for basements and walls; it’s not intended for attics or ceilings per manufacturer specs.

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Q: Is the product formaldehyde-free and certified for indoor air quality?
A: Yes. It is formaldehyde-free and GREENGUARD Gold certified.

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Q: Do I need additional vapor barrier?
A: No additional barrier is typically required, as the kraft facing serves as a vapor retarder; follow local code and climate best practices.

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Warmth, Quiet, and Clean Lines for Every Stud Bay

These kraft-faced batts slip into 2x4 cavities like they were tailor-made, creating a refined, quiet envelope around your rooms. The smooth kraft facing offers a tidy, professional look during build-out while the dense fibers deliver R-15 comfort. Pair with crisp drywall and painted millwork to let the serenity shine. It’s an essential layer for a home that feels luxuriously calm and energy-smart.

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Upgrade your 2x4 walls with JM R-15 batts today for easier installs, quieter rooms, and year-round efficiency.