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Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced

Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced

Best price now

$28.96at S&L LumberChecked 3 h ago

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $28.96 at S&L Lumber (checked Nov 10, 2026).
  • Checked at 5 stores.

Our take on the Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced

This is a single roll of Johns Manville R-13 kraft-faced fiberglass insulation, 15 inches wide by 32 feet long, covering 40 square feet. The kraft facing acts as a built-in vapor retarder, which makes it the right pick for exterior 2x4 walls where moisture control matters, and it is formaldehyde-free. It is a standard batt-and-roll product, so it competes on the same R-13 footing as other kraft-faced rolls; the facing and the formaldehyde-free binder are its main talking points. Best suited to wood-framed 2x4 walls, though it also works in floors, ceilings, basements and crawl spaces.

Best forExterior 2x4 wood-framed walls needing a vapor retarderBasement wall and rim joist insulationDIY patch and remodel jobsSound dampening between rooms
Pros
  • Kraft facing doubles as a vapor retarder, saving a separate membrane step
  • Formaldehyde-free binder suits buyers sensitive to indoor air quality
  • Fiberglass is dimensionally stable and resists slumping in the cavity
  • Cuts to fit any cavity size with a utility knife
  • Works in walls, floors, ceilings, attics and crawl spaces
Cons
  • R-13 only suits 2x4 framing; 2x6 walls need a thicker product
  • Fiberglass requires gloves, long sleeves and a mask to install
  • Kraft facing is flammable and must be covered with drywall or another approved finish
  • 15-inch width leaves extra trimming on standard stud spacing
  • Rolls are bulky and awkward to handle alone overhead

Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced prices at every store

  • S&L LumberNew

    In stock

    $28.96Checked 3 h ago
    Visit S&L Lumber
  • The Home DepotNew

    In stock

    $28.97Checked 3 h ago
    Visit The Home Depot
  • Lowe's Home ImprovementNew

    In stock

    $28.97Checked 3 h ago
    Visit Lowe's Home Improvement
  • Supply OntimeNew

    In stockReturn policy

    $33.97Checked Nov 9
    Visit Supply Ontime
  • Ace HardwareNew

    In stock

    $41.99+ $30.00 shippingChecked 3 h ago
    Visit Ace Hardware

Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced price history

Lowest price we've seen: $28.96 on Nov 10 at S&L Lumber. Tracked across 4 stores since Nov 10.

From Supply Ontime

  • Kraft-faced fiberglass insulation roll, R-13, 15 in. wide x 32 ft. long, covering 40 sq. ft.
  • Facing provides a built-in vapor retarder for moisture control
  • Formaldehyde-free™ insulation
  • Improves energy efficiency and provides sound control
  • For use in 2 in. x 4 in. wood-framed walls, interior and exterior walls, floors, ceilings and basement walls
  • Also suited to attics, crawl spaces and above suspended ceilings
Materials
Bonded glass fibers; kraft facing
Fit
For 2 in. x 4 in. wood-framed walls; rolls designed for 16 in. on-center stud spacing
Guarantee
Warranty information: N/A
Returns
Free and easy returns, no restocking fee; 90 days to return new, unused and unopened items in original packaging; opened or used products, gift cards and store
Shipping
Same-day delivery across LA, Orange County and the Inland Empire, or a scheduled 2-hour window; delivery priced by order weight; truck bed, curbside or white gl
In the box
1 roll, 15 in. x 32 ft. (40 sq. ft.)

About the Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced

About This Product

JM Kraft-faced Formaldehyde-free™ fiberglass insulation comes in a range of R-values, is ideal for moisture control in exterior walls and provides excellent temperature and noise control. Our Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced is perfect for insulating exterior 15 in., 2 in. x 4 in. walls, where moisture control is required. One roll covers 40 square feet and can be cut to fit any size cavity. Kraft-faced rolls are great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces, and are available for wood or steel stud framing. JM insulation is made from bonded glass fibers that are dimensionally stable and will not slump within the wall cavity, settle or break down during normal applications.

Key Features

• For use in 2 in. x 4 in. wood-framed walls

• Facing provides built-in vapor retarder for moisture control

• Improves energy efficiency and provides sound control

• Formaldehyde-free™ insulation

• Great for residential homes and commercial buildings

• For use in interior and exterior walls, floors, ceilings and basement walls

• Also great in attics, crawl spaces and above suspended ceilings

• Rolls are designed for long, unobstructed spaces with 16 in. on-center stud spacing

• Absorbs sound for more peace and privacy

• Cost-effective solution for a more comfortable home

• Safe product – no health risk

• Reduce unwanted noise with insulation

• JM is a partner of the seal and insulate with ENERGY STAR program

Specifications

R-Value
R13Source
Material
FiberglassSource
Length
32 ftSource
Width
15 inSource

Questions and answers

What R-value do I need for a 2x4 wall?
R-13 is the standard match for a 2x4 cavity because it is 3-1/2 inches thick and fills the stud depth. Going higher means compressing the batt, which lowers its effective R-value.
Does the kraft facing need a separate vapor barrier?
No. The facing is the vapor retarder, so it replaces a separate poly sheet on exterior walls. Face it toward the heated side of the wall and seal the flanges to the studs.
Can this go in a ceiling or floor?
Yes. It works in floors, ceilings, basement walls, attics and crawl spaces. In ceilings and other areas, check local code on whether the facing must be covered.
How much does one roll cover?
One roll covers 40 square feet at 15 inches wide and 32 feet long. Measure your wall area and add about 10 percent for cuts and waste.
Is it safe for people sensitive to chemicals?
The insulation is formaldehyde-free, which is a plus for indoor air quality. The glass fibers still irritate skin and lungs, so wear gloves, eye protection and a mask while installing.
Can I cut it to fit narrow cavities?
Yes. Cut the fiberglass with a sharp utility knife against a straight edge, keeping the facing intact and leaving a flange to staple.
Where is the Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced cheapest?
At S&L Lumber, for $28.96, as of our latest check.
Where can I buy the Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced?
5 stores we checked sell it, including The Home Depot, S&L Lumber, Lowe's Home Improvement, Ace Hardware, Supply Ontime.

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Buying guides that pick the Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced

  • Best R-13 fiberglass insulation rolls for 2x4 walls

Stores we've priced the Roll R-13 15 in. W x 32 ft. L (40 sq. ft.) Fiberglass Insulation Kraft-Faced at

  • Ace Hardware deals and prices
  • Home Depot deals and prices
  • Lowe's deals and prices
Thickness
3-1/2 inSource
Coverage Area
40 sq-ftSource
Resists
TearsSource