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Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in.

Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in.

4.7· 170 ratings

Best price now

$81.71at Cowls Building SupplyObserved at 3:54 PM

38% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in.

Owens Corning R-15 kraft-faced fiberglass batts are 3.5 in. thick, 15 in. wide and 7.75 ft. long, sized for 2x4 wall cavities and standard stud spacing. The kraft facing acts as a vapor retarder, so the batts suit exterior walls in most climates without a separate membrane. Each pack covers about 832 sq ft, and the best new price is $81.71 at Cowls Building Supply as of November 4, 2026, with 4 stores listing it new.

Best for2x4 exterior wall cavitiesDIY basement and garage wall insulationSound dampening between roomsBuyers wanting a built-in vapor retarder
Pros
  • R-15 in a 3.5 in. batt fits standard 2x4 framing
  • Kraft facing serves as the vapor retarder
  • Fiberglass absorbs some sound as well as heat
  • Non-combustible insulation core
  • Widely stocked and easy to cut with a utility knife
Cons
  • Flammable kraft facing needs covering with drywall or paneling
  • Fiberglass requires gloves, goggles and a mask to install
  • Faced batts must be stapled with flanges to the studs, not compressed
  • Not for 2x6 walls if you want higher R-value

Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in. prices at every store

  • Cowls Building SupplyNew

    In stock

    $81.71Observed at 3:54 PM
    Visit store
  • Arnold LumberNew

    In stock

    $95.04Observed at 3:54 PM
    Visit store
  • ZoroNew

    In stock

    $130.99Observed at 3:54 PM
    Visit store
  • eBayNew

    In stockSold by factory-hardware-store

    $164.99Observed at 3:54 PM
    Visit store

Also available at

  • Ace HardwareCheck price at Ace Hardware
  • Central ValleyCheck price at Central Valley
  • Insulation4USCheck price at Insulation4US
  • Supply OntimeCheck price at Supply Ontime

Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in. price history

Lowest price we've seen: $70.50 on Nov 4 at Supply Ontime. Tracked across 8 stores since Nov 4.

What reviewers say

With 4.7 out of 5 from 170 ratings, owners report the batts cut cleanly and staple in without sagging. Complaints center on itch and dust during installation and on facing that tears if handled roughly.

Pros
  • Cuts cleanly to fit stud bays
  • Holds its shape in the cavity
  • Facing staples down without tearing
  • Consistent thickness across the pack
Cons
  • Itchy fibers and dust during install
  • Facing can tear at the flanges
  • Bags are heavy to move around

Specifications

Form
Batts
Product Type
Fiberglass Batts
Insulation Type
Thermal, Acoustic
Insulated Plasterboard
No
Moisture Resistance
Moisture control
Fire Rating Class
Non-combustible (insulation itself), Flammable (facing)
Coverage Area
831.84 sq ft
R-Value Per Inch
4.2
Thickness
3.5 in
Batt Size
7.75 ft. x 15 in.
Length
7.75 ft
Width
15 in
R-Value
R-15
Thermal Resistance
R-15
Sound Absorption
Absorbs noise
Max Service Temp
250° F
Material Type
Fiberglass
Facing
Kraft Faced
Material Composition
Fiberglass
Density
High-density (R-15)
Vapor Retarder
Yes
Application
Moisture control, Thermal insulation, Walls
Recommended Usage
Residential
Suitable Surfaces
Plywood, Concrete, Floors, Walls

Questions and answers

Is R-15 enough for a 2x4 wall?
R-15 is about the most you can fit in a 3.5 in. cavity, so it is the standard choice for 2x4 exterior walls. Colder climates usually call for 2x6 framing and higher R-values.
Do I need a separate vapor barrier with kraft-faced batts?
No, in most cases. The kraft facing is the vapor retarder; face it toward the heated side of the wall and cover it with drywall. Check local code for your climate zone.
How much does one pack cover?
About 832 sq ft, which is roughly 86 batts at 7.75 ft by 15 in. Measure your wall area and add 10 percent for cuts and waste.
Can I use these in a ceiling or floor?
Yes, they fit standard joist bays, but the facing must stay covered by an approved finish. For attics, unfaced batts are often simpler.
When is the price lowest?
Insulation prices move with seasonal demand and are often lowest in fall and winter. The current best is $81.71 at Cowls Building Supply as of November 4, 2026; compare per-square-foot cost across the 4 stores.
Where is the Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in. cheapest?
At Cowls Building Supply, for $81.71, 38% under what the other stores charge, as of our latest check.
What do buyers say about the Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in.?
Rated 4.7 out of 5 from 170 ratings.
Where can I buy the Owens Corning R-15 Kraft Faced Fiberglass Insulation Batt 15 in. x 93 in.?
8 stores we checked sell it, including Cowls Building Supply, Arnold Lumber, Zoro, eBay, Ace Hardware.

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