R-30 Unfaced Fiberglass Attic Batt Insulation

Boost attic efficiency with Johns Manville’s R-30 unfaced fiberglass batts. Precut to fit 24-in on-center framing, these formaldehyde-free batts add thermal performance and sound control with 86.62 sq ft of total coverage.

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Key Features:

• High R-Value Performance: R-30 batts help improve energy efficiency and comfort in attics and ceilings
• Unfaced Design: No vapor barrier—ideal for adding over existing insulation where appropriate
• Precut Convenience: 48-in lengths sized for 23.625-in cavities and 24-in on-center joists; press in place
• Healthy Home Certifications: Formaldehyde-free, GREENGUARD Gold Certified, and SCS recycled content
• Durable Fiberglass: Will not rot, mildew, or corrode pipes, wiring, or metal studs

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Specifications Table:

Specification	Details
Coverage Area	86.62 sq ft
Length	48 in
Width	23.625 in
Thickness	8.25 in
Faced/Unfaced	Unfaced
Fits 2 x 4 Walls	No
Fits 2 x 6 Walls	No
For Use in Attics	Yes
For Use in Basements	No
For Use in Ceilings	Yes
For Use in Crawlspaces	No
For Use in Doors	No
For Use in Duct	No
For Use in Electrical	No
For Use in Floors	Yes
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	No
For Use in Windows	No
Formaldehyde Free	Yes
Framing Type	Wood studs
Insulation Type	Fiberglass
Maximum R-Value	R-30
R-Value per Inch	2.9268
Stud Spacing	24 in on-center
Sound Barrier	Yes
Vapor Retardant	No
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
Warranty	1-year limited
Package Count	11 batts
Package Type	Multi-pack
Bag Dimensions (L x W x D)	20 x 20 x 50 in
Package Weight	47.3 lb
Multi-Pack Quantity	4
Total Package Quantity	44
UNSPSC	11162400

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Frequently Asked Questions (FAQ):

Q: How much area does this package cover?
A: 86.62 square feet total coverage.

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Q: What are the batt dimensions?
A: Each batt is 23.625 inches wide, 48 inches long, and approximately 8.25 inches thick.

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Q: Is a vapor retarder included?
A: No. These are unfaced batts and do not include a vapor retarder.

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Q: Where can I use it?
A: Designed for attics and ceilings; also suitable for floors with 24-in on-center framing. Not for walls, crawlspaces, or masonry.

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

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Quiet Comfort, Tailored for the Attic

R-30 batts deliver a whisper-quiet calm while wrapping your home in a cocoon of cozy efficiency. I love the clean, unfaced profile—streamlined and effortless to layer for cathedral ceilings. Pair with crisp white attic decking and organized storage to create a polished, functional retreat above the living space. This is the kind of invisible luxury that elevates daily living from the inside out.

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Upgrade your attic with R-30 performance today and start saving on energy while enhancing year-round comfort.