JM (Johns Manville) R-21 Kraft-Faced Fiberglass Batt Insulation, 23 in x 93 in, 103.97 sq ftR 21 Kraft Faced Fiberglass Batt Insulation (23" x 93", 103. 97 sq ft) JM Kraft faced fiberglass batt insulation provides R 21 thermal performance with a built in kraft vapor retarder to help manage moisture in concealed wall applications. Pre cut batts fit 2x6 wood stud framing and can also help reduce sound transmission for a quieter, more comfortable home. Key Features: Built In Vapor Retarder: Kraft facing helps control moisture in concealed wall

R-21 Kraft-Faced Fiberglass Batt Insulation (23" x 93", 103.97 sq ft)

JM Kraft-faced fiberglass batt insulation provides R-21 thermal performance with a built-in kraft vapor retarder to help manage moisture in concealed wall applications. Pre-cut batts fit 2x6 wood-stud framing and can also help reduce sound transmission for a quieter, more comfortable home.

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Key Features:

• Built-In Vapor Retarder: Kraft facing helps control moisture in concealed wall applications.
• Designed for 2x6 Framing: Pre-cut batts sized for 24-in on-center wood-stud cavities and standard 8-ft walls.
• Energy & Comfort Upgrade: R-21 thermal performance helps improve HVAC efficiency and indoor comfort.
• Sound Control Benefit: Fiberglass batts help reduce sound transmission through walls.
• Easy Staple-Tab Installation: Press-fit between studs; staple flanges/tabs when additional securement is needed.

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Specifications Table:

Specification	Details
R-Value	R-21
Product Dimensions (W x L)	23 in x 93 in
Coverage Area	103.97 sq ft
Insulation Type	Fiberglass batt
Facing	Kraft faced
Thickness	5.5 in
R-Value per Inch	3.8181
Stud Spacing	24 in on-center
Fits Wall Size	2 x 6 walls
Framing Type	Wood studs
Sound Barrier	Yes
Vapor Retardant	Yes
Formaldehyde Free	Yes
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
For Use in Walls	Yes
For Use in Basements	Yes
For Use in Crawlspaces	Yes
For Use in Attics	No
For Use in Ceilings	No
For Use in Floors	No
For Use in Doors	No
For Use in Duct	No
For Use in Electrical	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
Fits 2 x 4 Walls	No
Will Not Rot/Mildew/Deteriorate; Noncorrosive	Yes
Package Weight	47.3 lb
Bag Dimensions (L x W x D)	23.5 x 20 x 49
Package Type	Multi-pack
Package Count	7
Total Package Quantity	28
Multi-Pack Quantity	4
Warranty	1-year limited
UNSPSC	11162400
CA Residents Prop 65 Warning(s)	No

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Frequently Asked Questions (FAQ):

Q: What wall framing does this insulation fit?
A: It’s sized for 2x6 wood-stud walls with 24-in on-center spacing.

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Q: Does it include a vapor barrier?
A: Yes—this is kraft-faced insulation, which functions as a vapor retarder for moisture control in appropriate applications.

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Q: Can I use it in basements or crawlspaces?
A: Yes; it is listed for use in basements and crawlspaces (and also for walls).

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Q: How do I install these batts?
A: Press the batt between studs; staple the kraft facing tabs to the framing if additional securement is needed.

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Q: Is it formaldehyde-free and indoor-air certified?
A: It is listed as formaldehyde-free and GREENGUARD Gold Certified.

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Quiet Luxury Starts Behind the Walls

There’s a subtle kind of glamour in a home that feels effortlessly calm—warm in winter, cool in summer, and beautifully hushed. These kraft-faced fiberglass batts bring that confidence with R-21 performance and a built-in vapor retarder that supports comfort in the places you don’t see but always feel. Use them to refine 2x6 exterior walls and basement spaces, then finish with textured plaster, wood paneling, or tailored millwork for a space that reads serene and intentional. It’s the kind of foundational upgrade that makes everyday living feel distinctly elevated.

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Upgrade your 2x6 walls with JM R-21 kraft-faced batts for lasting comfort, moisture control, and quieter rooms.