R-38 Unfaced Fiberglass Batt Insulation, 72-sq ft

High-performance Johns Manville R-38 unfaced fiberglass batts deliver thermal efficiency and sound control for attics, ceilings, and floors. Precut to 24-in x 48-in, these formaldehyde-free batts install easily between 24-in on-center wood studs to upgrade energy performance.

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Key Features:

• Energy-Saving R-38 Performance: Boosts thermal efficiency for attics, ceilings, and floors
• Unfaced Batts: No vapor barrier—ideal for layering over existing insulation
• Easy Fit Installation: Precut 24-in x 48-in batts press into 24-in OC wood framing
• Durable, Healthy Material: Formaldehyde-free fiberglass resists rot, mildew, and corrosion
• Indoor Air Quality Certifications: GREENGUARD Gold and SCS Recycled Content certified

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Specifications Table:

Specification	Details
Coverage Area (Sq. Feet)	72
Length (Inches)	48
Width (Inches)	24
Thickness (Inches)	12
Faced/Unfaced	Unfaced
For Use in Attics	Yes
For Use in Ceilings	Yes
For Use in Floors	Yes
For Use in Walls	No
Insulation Type	Fiberglass
Maximum R-Value	38
R-Value per Inch	3.1666
Stud Spacing (Inches)	24
Formaldehyde Free	Yes
Framing Type	Wood studs
Sound Barrier	Yes
Vapor Retardant	No
GREENGUARD Gold Certified	Yes
ENERGY STAR Certified	Yes
Package Weight (lbs.)	37
Bag Dimensions (L x W x D)	20 x 20 x 50
Package Type	Multi-pack
Package Count	9
Multi-Pack Quantity	4
Total Package Quantity	36
Warranty	1-year limited
UNSPSC	11162400

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Frequently Asked Questions (FAQ):

Q: How much area does one package cover?
A: Each package covers 72 sq ft with nine precut batts sized 24 in x 48 in.

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Q: Where can I install these batts?
A: They are designed for attics, ceilings, and floors with 24-in on-center wood studs; not for walls or masonry.

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Q: Do these batts include a vapor barrier?
A: No. They are unfaced and can be added over existing insulation where a separate vapor retarder is not required.

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Q: What is the thickness of each batt?
A: Each batt is 12 inches thick to achieve R-38 performance.

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Q: Are there any certifications?
A: Yes—GREENGUARD Gold for indoor air quality and SCS Recycled Content certification; formaldehyde-free.

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Quiet, Cozy Attics with Effortless Elegance

This plush, snow-white batt transforms drafty attics into serene, temperature-balanced sanctuaries. The generous 12-inch profile reads as clean architectural texture while delivering robust R-38 performance. Layer it neatly between framing for a refined, tailored look that softens acoustics throughout the home. It’s a smart, polished upgrade that feels undeniably luxurious.

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Upgrade your attic with R-38 Johns Manville batts today for immediate comfort and energy savings.