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Model #B240

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R-19 Kraft Faced Fiberglass Insulation Roll 15 in. x 39.16 ft.

  • Easy to cut, split and install
  • Greenguard GOLD certified & SCS Certified to be formaldehyde free
  • Offers exceptional thermal and sound control performance
  • See More Details

Frequently Bought Together


Product Overview

R-19 Kraft-faced fiber glass insulation is formaldehyde free insulation protected on one side with moisture resistant kraft facing. R-19 Kraft-faced rolls are perfect for insulating exterior 15 in., 2 in. x 4 in. walls where moisture control is required. 1-roll covers 48.96 sq. ft.
  • For use in 2 in. x 6 in. wood-framed walls, floors and crawl spaces
  • Rolls are designed for long, unobstructed spaces with 16 in. on-center stud spacing
  • Facing provides built-in vapor retarder for moisture control
  • Improves energy efficiency and provides sound control
  • JM is a partner of the seal and insulate with ENERGY STAR program

  • Test Item

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

Info & Guides

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Coverage Area (sq. ft.)
Product Length (ft.)
39.2 ft
Product Thickness (in.)
6.5 in
Product Width (in.)


Bag Size
2.17 ft. x 15.5 in. x 19 in.
Batt/Roll Size
39.2 ft. x 6.5 in. x 16 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,Vapor Retardant
Insulation Location
2x6 Wall,Basement,Crawlspace,Floor
Insulation R-Value
Insulation Type
Fiberglass Insulation
Number of Bags
Pieces Per Bag
Pieces per Pallet
Product Weight (lb.)
Roll or Batt

Warranty / Certifications

Warranty Information

Questions & Answers


Could this be wrapped along the side of an inflatable Coleman hot tub (77” diameter) to hold heat...

Asked by Ddubba October 16, 2020

Thank you for the interest in the JM Kraft Faced Fiberglass Rolls. Unfortunately, this type of insulation should not be left exposed to elements such as water. The kraft facing is also combustible, another reason why it can not be left exposed. You might want to check with the manufacturer of the hot tub for an insulation solution, as our product is not the best fit for this application.

How much do I need for a 14x28 room

Asked by Norma June 19, 2020

About 672 sq feet. Take out windows and doors.

I understood the instructions to install kraft faced against the subloor in my vented crawl space...

Asked by sharrie February 4, 2020

We recommend installing the vapor barrier insulation in a crawl space with the vapor barrier against the ground to prevent moisture from the ground getting into the crawlspace. However, putting another vapor barrier on top of the insulation will create moisture problems with insulation being sandwiched between two vapor barriers.

My walls are 10 feet with 2 x 6 studs. Would a roll work better than batts?

Asked by chopper November 10, 2019

yes ,much easier ,and use staple gun ,so easy

Bought 9 rolls, 4 of them are gorgeous snow white, the other 5 are black?? Is that normal? Or did they get wet & moldy?

Asked by Blou March 2, 2019

Hello Blou, Thank you for your interest in Johns Manville's fiberglass building insulation. Johns Manville manufactures fiberglass batts that are either white or brown in color. There is a binder or glue that holds the fibers together which is either white (acrylic) or brown (bio based). Although the products have a different appearance, they both perform the same at a given thickness and density. Best regards, Doug Fast

How many roles needed for 1050 SHARE FT 25X42

Asked by Johnny January 9, 2017

The square footage of each roll is (15"*470")/144 = 2500 sqft/roll. You have 1050 sqft of space to cover. 2500/1050 = ~3 rolls.

basement ceiling application

Asked by Sonny September 30, 2015

Paper side down

when installing between floor joists in a mobil home, should the paper face go down toward the ground or up facing the subfloor?

Asked by samp August 29, 2015

The paper always faces the interior of the home no mater if it is installed in the floor, wall or attic.

Customer Reviews

  • 4.7
    out of 119 reviews
  • 98% recommend this product
Filter by:
Showing 1-10 of 119 reviews
Fit well into my 2x6 wall bays. Fluffed up...
Fit well into my 2x6 wall bays. Fluffed up well in the cavity. I stapled them into the edges of the studs to allow the sheet rockers an easier time to get a flat wall. I found there could be a code concern with which staple option you choose. Couldn’t find anything in NJ. Inspector passed it stapled inside. The friction fit was good enough I didn’t even really need staples.
by Paul
Standard Insulation
I used this, with a mix of another brand, to insulate our garage walls. the faced roll does make handling easier. The face could use a little wider staple section so that it's easier to secure on the wall. Overall, the insulation does what we need, but I would use the other brand since it's cheaper and seems to be a little easier to secure with staples.
by BPuttkammer
by Insulation
Batt vs Roll - Either way it is a WIN!
Bought this to insulate the inside of the Shed/Outbuilding Roof. Opening the roll allowed me to press fit what I need to into the void & then cut to length. I wore Goggles over my glasses an a long sleeve shirt with 2 nitrite gloves for safety. Cutting was done with a serrated bread knife in a sawing fashion. Cutting was easy & fast. There are 2 strips of stapling strips that run along each side & fold out as you need while stapling. A Nice Feature. Doesn't cover as much as a pre cut batt bag of insulation however gives you a better fitting by cutting to length what you need. I have to go back for more... Buy it, worth every penny!
by HomeDepotCustomer
1 person found this helpful
Great Solution To Poorly Insulated Old Home
I selected this item as part of my participation in the Home Depot Seeds program since I am currently in the market for home insulation for a home that is less than 10% insulated on the walls only due to kitchen and bath remodeling prior to purchasing the home. I am fortunate to have prior experience installing insulation in my parent's home when we were rebuilding from the foundation up after a tornado destroyed the house. Back then, they went with what is commonly referred to as "Pink Panther Insulation" and it worked pretty well. They never had mold issues in the basement and the insulation maintained its R-value over the course of 25 years of occupancy based on utility costs for heating and cooling. I decided that it would be beneficial to try the now popular Johns Manville brand insulation to give me a comparison on the installation difficulty and performance gain in terms of sound dampening and thermal transfer resistance. Since the only version of the insulation available through the seeds program was the 15" width, I knew that I wouldn't be able to install this in my attic since the rafters are 21" width, so instead I installed this insulation between the rafters in my basement. This had the benefit of restricting air flow coming between the foundation and first floor walls, increasing the thermal transfer resistance of the old wooden HVAC supply ductwork and dampening the sound transmitted through the first floor wooden slat boards which have some air gaps (important since dogs' crates are in basement where I was installing the insulation). Installing the single roll of 32 feet of insulation by myself took less than 4 hours despite my having to move storage bins around the basement to access the rafters during installation. My recommendation to the typical homeowner looking to DIY their insulation installation is to work as a team of two. The reason for this is that it will make it easier to pass the insulation around and inbetween obstructions like rafter cross supports, electrical conduit, gas and water pipelines and HVAC ducts and vents. Working as a team of two, the average home owner with no prior insulation experience should be able to finish a 30' x 50' floor rafter section in a single day. Make sure you have a reliable construction-grade hand stapler or construction-grade hand tacker to secure the insulation to wooden beams and studs. Also recommended is to have a utility knife with a fresh blade, a 25' tape measure, a straight piece of metal to act as a cutting guide and an appropriate size step ladder.
by SteveW
1 person found this helpful
Very nice product to work with
I purchased this insulation for few reasons: besides excellent thermal-insulating properties it also offers some sound insulation and is formaldehyde free. As I have learned, formaldehyde is commonly used as a binder for glass fiber and very high amount of formaldehyde gasses is hazardous to human health. Internet provides plenty of sometimes contradictory information on this subject. In normal life we are surrounded by formaldehyde in almost all aspects of our life: products in our homes (furniture, carpeting, clothing …) My philosophy is: the less chemicals like this, the better for human health. This Kraft insulation not only is formaldehyde free, but also does not have pink coloring added. Pink dye in other insulation products adds next to formaldehyde its own out-gassing characteristics. We used this insulation for 2x6 rebuilt kitchen exterior wall. On the back side of paper wrapper is shown guidance how to properly install the wall insulation. Working with this insulation was good, insulation is easy to cut to size or to split the thickness due to insulating of electrical wiring. It can be proudly used for green buildings.
by MECzech
2 people found this helpful
R-19 Kraft Faced Roll Insulation
Dimensions 6 1/2 Inches Thick 15.9inches wide x 39 ft 2 inches. length per roll. Great for 2 x 6 walls/floors/crawl spaces. Thermal and Soundproofing. Promotes healthy environment as it is Formaldehyde free. Using this roll insulation allows you to choose the length of your batts rather than end of a few inches short of filling the space. Kraft facing provides a vapor retarder. I found this product to be easy to cut with scissors or box knife.
by capnbobby
2 people found this helpful
by Paul
Installed roughly 1,300sqft of insulation in my tight crawl space...
Installed roughly 1,300sqft of insulation in my tight crawl space attic. Product worked great and was relatively easy to install, cut, etc.
Quality product, easy to install....
Quality product, easy to install.
by RWS
Showing 1-10 of 119 reviews