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R-38 EcoBatt Kraft Faced Fiberglass Insulation Batt 12 in. x 24 in. x 48 in.

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  • R-38 fiberglass insulation pre-cut for install in ceiling & attic
  • Provides temp. control and sound absorption in floors & ceilings
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Product Overview

Knauf R-38 EcoBatt Kraft faced fiberglass insulation with ECOSE Technology is a leading sustainable insulation. All of our batts are bonded with the revolutionary, industry-transforming, plant-based ECOSE Technology. They are validated by UL Environment as formaldehyde-free, and they contain no Red List chemicals. Made with a high degree of recycled glass, our insulation batts are pre-cut to install quickly and easily with low dust and low hassle. Our kraft facing is durable, resists tears, and is marked in 1 ft. increments to streamline installation. And like every Knauf Insulation batt, EcoBatt is resilient and recovers quickly out of the package for a snug fit. Install Knauf Insulation in your home and stay comfortable year-round. (Recommended use includes vaulted ceilings and attic spaces.)
  • R-38 insulation is best used for application in attics & cathedral ceilings
  • Each R-38 fiberglass insulation batt is 12 in. D x 24 in. W x 48 in. L
  • Each individual bag covers 64 sq. ft. of R-38 insulation
  • The R-38 R-value improves personal comfort in your home or office
  • R-38 insulation has high-quality materials made of resilient fibers for more energy efficiency and is Energy Star rated
  • Installation made fast and easy using pre-cut, softer to the touch insulation that has durable kraft facing marked in 1 ft. increments with stapling flange where cutting and splitting is simple with low dust
  • R-38 insulation compression packaging fits more product in every bag and is designed to last the life of the structure
  • Knauf fiberglass insulation provides superior thermal and sound control perfomance that improves comfort, privacy and productivity
  • Kraft vapor retarder helps prevent water vapor from condensing to liquid water within the cavity and has a vapor transmission (permeance) rating of 1.0 or less. Kraft facing will burn and should not be left exposed
  • Reduces heating and cooling bill by preventing outside air from entering and keeping controlled air inside
  • Fiberglass insulation minimizes insect intrusions by covering areas of entry
  • All Knauf fiberglass insulation is GREENGUARD Gold certified, free of red list chemicals and formaldehyde

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  • Click here to learn more about Eco Options and Energy Efficiency

Additional Resources

From the Manufacturer

Compare Similar Fiberglass Insulation

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R-38 EcoBatt Kraft Faced Fiberglass Insulation Batt 12 in. x 24 in. x 48 in.
R-30 EcoBatt Kraft Faced Fiberglass Insulation Batt 10 in. x 16 in. x 48 in.R-19 EcoBatt Kraft Faced Fiberglass Insulation Batt 6-1/4 in. x 23 in. x 94 in.
BrandKnauf InsulationKnauf InsulationKnauf Insulation
NameR-38 EcoBatt Kraft Faced Fiberglass Insulation Batt 12 in. x 24 in. x 48 in.R-30 EcoBatt Kraft Faced Fiberglass Insulation Batt 10 in. x 16 in. x 48 in.R-19 EcoBatt Kraft Faced Fiberglass Insulation Batt 6-1/4 in. x 23 in. x 94 in.
Insulation R-ValueR38R30R19
Insulation LocationAtticAttic2x6 Wall,Ceiling Insulation
Faced or UnfacedFacedFacedFaced
Product Thickness (in.)12 in10 in6.25 in
Insulation FeaturesFormaldehyde Free,Vapor RetardantFormaldehyde Free,Vapor RetardantFormaldehyde Free,Vapor Retardant
Pack Size111
Product Width (in.)24 in16 in23 in
Roll or BattBattBattBatt
View ProductView ProductView Product



Cover Area Per Bag (sq. ft.)64 ft²Coverage Area (sq. ft.)64 ft²
Product Length (ft.)4 ftProduct Thickness (in.)12 in
Product Width (in.)24 in


Bag Size4.16666667 ft. x 25 in. x 16 in.Batt/Roll Size4 ft. x 12 in. x 24 in.
Compatible Install SurfaceCement,Concrete,Copper Pipes,Existing Drywall,Existing Insulation,Fiberglass,Metal,PVC/CPVC Pipes,Pex Pipes,Plywood,Tile Flooring,WoodFaced or UnfacedFaced
Insulation FeaturesFormaldehyde Free,Vapor RetardantInsulation LocationAttic
Insulation R-ValueR38Insulation TypeBatt
Number of Pieces8Pack Size1
Product Weight (lb.)33 lbReturnable90-Day
Roll or BattBatt

Warranty / Certifications

Warranty Information1 Year

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Customer Reviews

  • 4.7
    out of 54 reviews
  • 97%recommend this product
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Showing 1-10 of 54 reviews
Great product...
Great product
Response from Tamy WoodwardApr 26, 2021
We appreciate your review and thank you for purchasing Knauf Insulation. KnaufInsulation
  • Verified Purchase
2 found this review helpful
So easy to install!
We are first time home owners, and one of our first big DIY projects was insulating the attic. The Knauf Insulation comes in 16”x48” batts, which made installation a breeze. We were able to insulate the whole attic in one afternoon. Our friends and family were so impressed!! We owe it all to this quality product! Highly recommend.
Response from Customer ServiceFeb 22, 2021
Congratulations on your first home! That is a great first project that can lower your energy costs and improve the comfort of the home. We are glad to hear that Knauf EcoBatt Insulation worked well in your attic and thank you so much for sharing. Excellent photo!
    • Recommended
    We order by the truckload
    I’m an insulation contractor with a few crews and we install anywhere from 25-40 truckloads of Knauf insulation per year. For years it has been our preferred brand for a few reasons. It is a very consistent material throughout which makes it cut more cleanly and install more smoothly. Other brands we have tried have actually had chunks of unprocessed glass in them. Others fall apart as you try to handle the pieces. It is a smoother fiber which makes it less unpleasant to handle. Other brands feel rougher. We also love that it is greenguard certified as well as the high recycled content. Overall this all translates into a better installation experience, which enhances the job outcome and makes a Grade 1 install more consistently achievable, and that’s what is best for our customers’ comfort and energy performance. We are proud to install this material.
    Response from Customer ServiceJan 15, 2021
    Thank you very much for your kind words and sharing this great photo of the installed insulation. It looks excellent! We are thrilled to hear that Knauf Insulation is your preferred brand for so many reasons. The best experience for our customers is our main goal. We look forward to providing you with top quality fiberglass insulation for years to come.
      • Recommended
      • Verified Purchase
      • Verified Purchase
      It was easy to install...
      It was easy to install
      Response from Tamy WoodwardApr 6, 2022
      We appreciate your review and thank you for your purchase of Knauf Insulation. KnaufInsulation
      • Verified Purchase
      by far the best product on the market!
      10 years ago our guys used to want to use Owen's because of the quality, now they will complain about Owens product whenever its in the building, the knauf product has came so far in quality that they dont want to use anything else!!
        • Recommended
        Product quality
        Knauf product quality is second to none in the fiberglass insulation industry.
          • Recommended
          Great Features
          excellent product installs great, but availability is not good.
            great batting and blown in insulation
            I have used all kinds of batt insulation and this is the best. The batting is better quality than most other types. It is packaged nicely and comes out of the package as it should. It has been a struggle not being able to get 9ft material or R49 batts though.
              • Recommended
              Showing 1-10 of 54 reviews