R-21 Kraft-Faced Fiberglass Wall Batt Insulation

Johns Manville R-21 kraft-faced fiberglass batts are designed for 2x6 wood-stud walls to help improve energy efficiency and reduce noise. The kraft facing provides a built-in vapor retarder for moisture control in concealed applications like exterior walls.

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Key Features:

• Sized for 2x6 Walls: 15.25-in wide batts fit 16-in on-center wood-stud framing and 8-ft wall cavities.
• Built-In Vapor Retarder: Kraft facing helps control moisture in concealed wall applications.
• Energy & Sound Control: Helps improve thermal performance and provides sound control.
• Easy Installation: Press-fit between studs and staple facing tabs to framing when needed.
• Formaldehyde-Free & Durable: Formaldehyde-free fiberglass that won’t rot or mildew and is noncorrosive to pipes and wiring.

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Specifications Table:

Specification	Details
Category	Batt Insulation
Insulation Type	Fiberglass
Faced/Unfaced	Kraft faced
Maximum R-Value	21
R-Value per Inch	3.8181
Width (Inches)	15.25
Length (Inches)	93
Thickness (Inches)	5.5
Coverage Area (Sq. Feet)	68.942
Stud Spacing (Inches)	16
Framing Type	Wood studs
Fits 2 x 6 Walls	Yes
Fits 2 x 4 Walls	No
Vapor Retardant	Yes
Sound Barrier	Yes
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	Yes
For Use in Attics	No
For Use in Ceilings	No
For Use in Floors	No
For Use in Garage Doors	No
For Use in Doors	No
For Use in Windows	No
Package Weight (lbs.)	29.47
Package Type	Multi-pack
Package Count	7
Total Package Quantity	35
Multi-Pack Quantity	5
Bag Dimensions (L x W x D)	20 x 20 x 50
UNSPSC	11162400

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Frequently Asked Questions (FAQ):

Q: What wall framing is this insulation designed for?
A: It’s designed for 2x6 wood-stud walls with 16-in on-center spacing.

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Q: Does it include a vapor barrier?
A: Yes—it's kraft-faced and includes a built-in vapor retarder for moisture control.

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Q: Where can I use these batts?
A: They are listed for use in walls, basements, and crawlspaces (not for attics or ceilings).

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Q: Is it formaldehyde-free?
A: Yes, it is specified as formaldehyde-free.

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Q: How much area does one package cover?
A: Coverage is 68.942 sq ft per package.

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Quiet luxury starts behind the walls.

Think of this as the invisible couture of a well-finished home—R-21 fiberglass batts that refine comfort with a hush and a steady, enveloping warmth. The kraft facing adds a purposeful layer of protection, quietly managing moisture where craftsmanship matters most. Use it to elevate a 2x6 wall assembly in living spaces and bedrooms for a calmer, more insulated feel. It’s a foundational detail that makes everyday life feel undeniably more luxurious.

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