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Internet #306769089

Model #U1315

R-13 Unfaced Fiberglass Insulation Batt 24 in. x 96 in. (8-Bags)

  • R-13 offers efficient noise and thermal control
  • Keeps rooms cool in summer and warm in winter for low energy cost
  • Ideal for 2x4 wood-framed walls
  • See More Details

Product Overview

JM Unfaced Formaldehyde-free fiberglass insulation offers R-values ranging from R-11 to R-38, as well as effective thermal and noise control. it delivers comfort helping homes stay cooler in the summer and warmer in the winter to reduce energy costs. Our Unfaced fiberglass insulation is available in pre-cut batts for standard-sized wall cavities and in rolls that can be cut to fit any size cavity. Great for: new construction and remodels.
  • For use in 2 in. x 4 in. wood-framed walls
  • Batts are pre-cut for use in standard 8 ft. walls with 24 in. on-center stud spacing
  • Unfaced without a vapor retarder can be added to existing insulation
  • Improves energy efficiency and provides sound control
  • JM is a partner of the seal and insulate with ENERGY STAR program
  • SCS recycled content certification
  • GREENGUARD Gold certified for office indoor air quality and SCS certified for home indoor air quality

Info & Guides

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Coverage Area (sq. ft.)
Product Length (ft.)
8 ft
Product Thickness (in.)
10.25 in
Product Width (in.)
24 in


Bag Size
4.08 ft. x 20 in. x 20 in.
Batt/Roll Size
8 ft. x 10.25 in. x 24 in.
Compatible Install Surface
Cement,Concrete,Copper Pipes,Existing Drywall,Existing Insulation,Fiberglass,Metal,PVC/CPVC Pipes,Pex Pipes,Plywood,Tile Flooring,Wood
Coverage Area per Bag (sq. ft.)
Faced or Unfaced
Insulation Features
Formaldehyde Free,Friction Fit,Soundproofing Insulation
Insulation Location
2x4 Wall
Insulation R-Value
Insulation Type
Fiberglass Insulation
Number of Bags
Pieces Per Bag
Pieces per Pallet
Product Weight (lb.)
40.48 lb
Roll or Batt

Warranty / Certifications

Warranty Information

Questions & Answers


how many batts per bundle

Asked by john November 12, 2020

There are 11 pieces per bag. So in the 8 bag bundle you will get 88 pieces total.

how many square ft does 8 bags cover

Asked by greg October 6, 2020

8 bags covers 1307sq ft

Is this product intended for steel studs on 16" centers? Also, does it come in 10' lengths?

Asked by Rick January 12, 2020

It is intended for steel stud use, but we only offer it in lengths of 8 ft. The insulation can be butted up against itself if you need to cut pieces out to completely fill the space.

Will this U1314 product fit tight enough to use with 3-5/8 steel studs 16" on center ?

Asked by Dave January 11, 2020

Yes, the 16" wide fiberglass insulation was designed specifically for installation in Steel Stud systems.

why can't I get just one bag price

Asked by Danny December 15, 2019

I would contact Home Depot with that question, we are the manufacturer and we sell to distributors like Home Depot.

How many batts per bag on this product - R13 - 7.75 ft. x 3.5 in. x 23 in.

Asked by Joe November 21, 2019

Joe, there are 11 batts per bag. Thank you for considering our product.

why are some r-13 insulation able for use in basements and others are not and which ones can be u...

Asked by jackson September 27, 2019

The product you need for your project depends on your stud size and if it has a facer on it or not. If your basement studs are deeper than 4" you may need a higher R-value product. In most cases, you also need a vapor retarder for exterior walls which this product is unfaced (no vapor retarder).

Is this insulation white or brown in color? I know it is irrelevant to performance but I want to order white.

Asked by Adam February 26, 2019

Hello Adam, Thank you for your interest in Johns Manville's unfaced fiberglass insulation. The current product could be either brown or white. In the near future, the entire product line will white. Best regards, Doug Fast

Spec sheet says this is 10.25 inches thick. Is this a typo for an R13-2x4 wall insulation?

Asked by CWR February 10, 2019

Hello CWR, Thank you for your interest in Johns Manville's unfaced fiberglass insulation. The R-13 product is manufactured to a nominal thickness of 3.5" . A 10.25" thick product would be either the standard R-30 product or the high performance R-38c "cathedral ceiling" batt product. The R-value and thickness should be clearly marked on the package. What you are describing, R-13 at 10.25", would be incorrect. Best regards, Doug Fast

Customer Reviews

  • 4.7
    out of 3 reviews
  • 0% recommend this product
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Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Easy to install. Held together well, yet cut easily when...
Easy to install. Held together well, yet cut easily when needed. Banding really helps save space, as it expands quite a bit once it is cut
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
Showing 1-3 of 3 reviews