SKU: 64676239078

Johns Manville R-30 Unfaced Fiberglass Batt Attic Insulation, 58.66-sq ft Coverage (16-in W x 48-in L)

Sale price$67.16 Regular price$74.62
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Description

Johns Manville R-30 Unfaced Fiberglass Batt Attic Insulation, 58.66-sq ft Coverage (16-in W x 48-in L)R 30 Unfaced Fiberglass Batt Attic Insulation Formaldehyde free fiberglass batts designed for attics deliver R 30 thermal performance with sound control. Precut to fit 16 in on center wood stud cavities, each bag covers 58. 66 sq ft for efficient energy upgrades. Key Features: High R Value Performance: R 30 thermal insulation helps reduce energy costs and improve comfort Unfaced Design: No vapor barrierideal for adding over existing insulation layers

R-30 Unfaced Fiberglass Batt Attic Insulation

Formaldehyde-free fiberglass batts designed for attics deliver R-30 thermal performance with sound control. Precut to fit 16-in on-center wood stud cavities, each bag covers 58.66 sq ft for efficient energy upgrades.


Key Features:

  • High R-Value Performance: R-30 thermal insulation helps reduce energy costs and improve comfort
  • Unfaced Design: No vapor barrier—ideal for adding over existing insulation layers
  • Precut for Easy Fit: 16-in x 48-in batts press in place between joists for quick installation
  • Durable, Safe Material: Fiberglass won’t rot or corrode; formaldehyde-free and GREENGUARD Gold Certified
  • Sound Control: Helps dampen noise in attics and living spaces

Specifications Table:

Specification Details
Coverage Area (Sq. Feet) 58.66
Length (Inches) 48
Width (Inches) 16
Thickness (Inches) 10.25
Faced/Unfaced Unfaced
For Use in Attics Yes
For Use in Basements Yes
For Use in Ceilings Yes
For Use in Floors Yes
For Use in Crawlspaces No
For Use in Walls 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
Formaldehyde Free Yes
Framing Type Wood studs
Insulation Type Fiberglass
Maximum R-Value 30
R-Value per Inch 2.9268
Sound Barrier Yes
Stud Spacing (Inches) 16
Vapor Retardant No
ENERGY STAR Certified Yes
GREENGUARD Gold Certified Yes
Warranty 1-year limited
Package Weight (lbs.) 22.8
Bag Dimensions (L x W x D) 16.5 x 20 x 50
Package Type Multi-pack
Package Count 11
Multi-Pack Quantity 4
Total Package Quantity 44
UNSPSC 11162400

Frequently Asked Questions (FAQ):

Q: How much area does one bag cover?
A: One bag covers 58.66 square feet with 11 precut pieces sized 16 in x 48 in.


Q: Can I install this over existing insulation?
A: Yes. As an unfaced batt without a vapor barrier, it can be layered over existing insulation where appropriate.


Q: What framing does it fit?
A: Designed for 16-in on-center wood stud or joist spacing in attics and ceilings.


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


Q: Where can it be used?
A: For use in attics, ceilings, basements, and floors; not intended for walls or crawlspaces.


A quiet, cozy attic upgrade with effortless precision

These pristine, unfaced batts slip neatly between joists, instantly dialing up comfort while softening household noise. The generous 10.25-in loft and R-30 rating create a plush thermal blanket that feels tailor-made for 16-inch spacing. Layer them to build a serene envelope above bedrooms, then finish with clean access panels for a refined look. It’s a simple, luxe step toward a calmer, more efficient home.


Upgrade your attic with R-30 comfort—add Johns Manville batts to boost efficiency and quiet today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64676239078

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4.9 ★★★★★
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Verified Purchase
Jordan
San Leandro, US
★★★★★ 5
Great product
Size: 58 inch, Color: Black
This cover is excellent quality and fits my grill perfectly. The material feels durable, and it’s fully waterproof, which protects the non‑stainless steel parts from rain and moisture. Overall, it gives me great peace of mind knowing my grill is well protected.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
F
Verified Purchase
Firecapt45
Pawtucket, US
★★★★★ 5
Very nice and priced right
Size: 48 inch, Color: Heavy Duty-Black
Although this cover is slightly larger than my grill, it's heavy duty and should last a long time in the weather. Installing was a breeze, and the velcro straps help secure it in place better than my last one. This truly is a nice cover and appears to be able to withstand anything thrown at it. Nice product, 2 thumbs up!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
F
Verified Purchase
F. Barber
Carnegie, US
★★★★★ 4
Too much material so that it gets stuck under wheels
Size: 58 inch, Color: Heavy Duty-Black
Very large grill cover, lightweight, but it covers my grill and since it is over-sized very easy to take off and put back on. My problem with it is it's got too much material so that if I have to move my grill away from the house to use, the material gets stuck under the wheels. I may have to re-hem it or send it back. Those with stationary grills won't have this problem.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
D
Verified Purchase
Dalton Taylor
Battle Creek, US
★★★★★ 5
Good value
Color: A-white, Size: X-Large
Great shirt for the price! Lightweight, comfortable, and the fit is true to size. Non wrinkle material, Great for golf/athletic shirts or blanks for dtf or embroidery.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
M
Verified Purchase
Mr Dezo
Bozeman, US
★★★★★ 5
Clean & classy look, but make sure you buy a size bigger because it runs small.
Color: A-black, Size: 4X-Large
As for sizing, make sure you buy a size up because it runs kinda small, (you’ll thank me!). Quality is good, but the best feature-it has a dress collar polo with some color around the neck and buttons, which gives it a clean and classy look, (which I’m a fan of), the comfort of the polo is about average. I absolutely recommend!
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Reviewed in the United States on April 28, 2026

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