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R-13 EcoBatt Kraft Faced Fiberglass Insulation Batt 3-1/2 in. x 15 in. x 93 in.

  • R-13 fiberglass insulation pre-cut for 2x4 walls, floors & attics
  • Provides temp. control and sound absorption in floors and walls
  • Natural color, eco-friendly (formaldehyde-free), recycled content
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Product Overview

Knauf R-13 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 2x4 stud walls along with floor and attic use.)
  • R-13 insulation is best used for application in 2x4 walls
  • Each R-13 fiberglass insulation batt is 3.5 in. D x 15 in. W x 93 in. L
  • Each individual bag covers 116.25 sq. ft. of R-13 insulation
  • The R-13 R-value improves personal comfort in your home or office
  • R-13 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-13 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

Info & Guides

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Cover Area Per Bag (sq. ft.)
116.25 ft²
Coverage Area (sq. ft.)
116 ft²
Product Length (ft.)
7.75 ft
Product Thickness (in.)
3.5 in
Product Width (in.)
15 in


Bag Size
4.16666667 ft. x 17 in. x 16 in.
Batt/Roll Size
7.75 ft. x 3.5 in. x 15 in.
Compatible Install Surface
Cement,Concrete,Copper Pipes,Existing Drywall,Existing Insulation,Fiberglass,Metal,PVC/CPVC Pipes,Pex Pipes,Plywood,Tile Flooring,Wood
Faced or Unfaced
Insulation Features
Formaldehyde Free,Vapor Retardant
Insulation Location
2x4 Wall
Insulation R-Value
Insulation Type
Number of Pieces
Pack Size
Product Weight (lb.)
29.3 lb
Roll or Batt

Warranty / Certifications

Warranty Information
1 Year Limited Warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.6
    out of 129 reviews
  • 93%recommend this product
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Showing 1-10 of 129 reviews
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
      This doesn’t seem to itch you as bad as the pink or yellow stuff! Cuts easily with scissors or ra...
      This doesn’t seem to itch you as bad as the pink or yellow stuff! Cuts easily with scissors or razor knife, does not fall apart once it is cut. Expands to height stated on package or slightly higher. Over the past year I have used this product for insulating my garage, some areas in my basement, and attic. Very happy with this product. Great sound deading ability!
      • Recommended
      1 person found this helpful
      First, I am a DIY kind of person. I have had limited experience with insulation, so I read up a...
      First, I am a DIY kind of person. I have had limited experience with insulation, so I read up a bit before starting this project. I was told when we moved in the house by a home inspector that the attic space would be better if I changed the loose fill insulation that they crammed between the plywood flooring and the ceiling with batting. While I may get better results with a higher rated R value for this project, this is what was available to me. My attic space allows me to put two bats down between the floor and the plywood. I just make sure to take the vapor barrier off of the top layer to allow it to breathe. I am not seeing any current issues with moisture in the loose fill, so I do not expect any issues with this batting. It was a perfect fit for my needs as I am on 16" spacing. I am not cramming it in the floor as there was enough room to place one on top of the other without cramming it down. I have worn the necessary protection while installing, gloves, long sleeves, mask, etc... I can say there really has not been an issue of dust or insulation just sticking to me. I do think it is true that this is a dust free insulation based on my experience. I can tell that 8 ft pieces are perfect fit for a standard wall. While I am using it for the attic floor, it appears I may have enough left to go around the walls in the stairwell to the bonus room. Curious to see how improved that may make the fluctuation in the temperature of the hallway and bonus room. I liked the fact that this is ECO insulation as well. This is definitely well suited for standard walls, 8ft high on 16" spacing. Seems to be a good quality product.
      • Recommended
      I noticed first off is the dark brownish color. not the usual pink or tan. maybe that is the recy...
      I noticed first off is the dark brownish color. not the usual pink or tan. maybe that is the recycled content ? it does feel softer to the touch and i did notice somewhat less particles in the air. as to the performance it seems fuller than some i have used which i think would add to the insulation performance. im using it in a 22x16 garage with 2x4 walls. so i will defiantly be able to feel the difference it creates. Kraft facing is heavy along with staple flanges. perfect for full length 8' wall cavities and cuts easily with utility blade.
      Response from Tamy WoodwardDec 5, 2018
      Thank you for asking about the brown product. Our product is naturally brown in color due to no artificial colors or dyes added. We also manufacture using recycled glass that would normally go into landfill. KnaufInsulation
      • Recommended
      Easy to work with. And lots of fun
      Easy to work with. And lots of fun
      • Verified Purchase
      • Recommended
            Rating provided by a verified purchaser...
            Rating provided by a verified purchaser
            Response from Tamy WoodwardNov 1, 2021
            Thank you for your purchase of Knauf Insulation and we appreciate you taking the time to review our product. KnaufInsulation
              Showing 1-10 of 129 reviews