Johns Manville R-30 Unfaced Fiberglass Batt Insulation, 88-sq ft Coverage, 24 in x 48 in (U1344S)R 30 Unfaced Fiberglass Batt Insulation, 24 in x 48 in Improve thermal performance and sound control in attics and ceilings with Johns Manville R 30 unfaced fiberglass batts. Precut to 24 in x 48 in for 24 in on center framing, these formaldehyde free batts cover 88 sq ft per package and are GREENGUARD Gold certified. Key Features: High R Value Thermal Performance: R 30 fiberglass batts help boost energy efficiency and comfort Unfaced Design: No vapor

R-30 Unfaced Fiberglass Batt Insulation, 24 in x 48 in

Improve thermal performance and sound control in attics and ceilings with Johns Manville R-30 unfaced fiberglass batts. Precut to 24 in x 48 in for 24-in on-center framing, these formaldehyde-free batts cover 88 sq ft per package and are GREENGUARD Gold certified.

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Key Features:

• High R-Value Thermal Performance: R-30 fiberglass batts help boost energy efficiency and comfort
• Unfaced Design: No vapor retarder—ideal for adding over existing insulation where permitted
• Precut for Easy Install: 24 in x 48 in batts fit 24-in on-center wood studs; simply press in place
• Durable and Safe: Will not rot, mildew, or corrode pipes/wiring; formaldehyde-free and noncorrosive
• Certified Air Quality: GREENGUARD Gold and SCS recycled content certifications

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Specifications Table:

Specification	Details
R-Value	30
Insulation Type	Fiberglass
Faced/Unfaced	Unfaced
Dimensions (each batt)	24 in W x 48 in L x 10.25 in T
Coverage Area	88 sq ft per package
Stud Spacing	24 in on-center
Framing Type	Wood studs
For Use In	Attics, ceilings, basements, floors
Not For Use In	Walls, crawlspaces, doors, ducts, electrical, garage doors, masonry, plumbing, vents, windows
Formaldehyde Free	Yes
Sound Barrier	Yes
Vapor Retardant	No
Package Weight	34.1 lb
Bag Dimensions (L x W x D)	24.5 in x 20 in x 50 in
Package Type	Multi-pack
Package Count	11 pieces
Multi-Pack Quantity	4; Total package quantity 44 (as listed)
R-Value per Inch	2.9268
ENERGY STAR Certified	Yes (program partner)
GREENGUARD Gold Certified	Yes
Warranty	1-year limited
Thickness	10.25 in
Length	48 in
Width	24 in

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Frequently Asked Questions (FAQ):

Q: How much area does one package cover?
A: One package covers 88 square feet.

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Q: Where can I use these batts?
A: They are designed for wood-framed attics, ceilings, basements, and floors; not for walls or crawlspaces per listing.

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Q: Do these batts have a vapor barrier?
A: No, they are unfaced and contain no vapor retarder.

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Q: What are the dimensions and thickness?
A: Each batt is 24 in wide by 48 in long with a nominal thickness of 10.25 in.

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Q: Are there any certifications?
A: Yes—ENERGY STAR partner, GREENGUARD Gold Certified, and SCS Recycled Content certified.

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Silent Comfort, Tailored for the Attic

These alabaster batts bring a serene hush to the home, cocooning your upper floors in quiet luxury while elevating energy performance. I love the crisp, uniform edges—precut to slip neatly between joists for an impeccably tidy install. Layer them generously in the attic for a plush, cloudlike blanket that improves acoustics and keeps temperatures consistent. It’s an elegant essential for crafting a refined, comfortable sanctuary from the roof down.

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Upgrade your attic with R-30 performance today and start saving on energy bills season after season.