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Owens Corning

Model 86BG

Internet #100320343

Store SKU #465124

Store SO SKU #192627

FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing

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Product Overview

FOAMULAR Extruded Polystyrene (XPS) Rigid Foam Insulation offers a comprehensive line of products in a wide choice of sizes, thicknesses and edges with a Lifetime Limited Warranty for the life of the home or building. The products are easy to handle, score, cut and install & no special tools are needed. Products can be used on wood, steel framing or concrete walls. FOAMULAR XPS resists moisture and retains R-value even after exposure to standing water and wet soil. Only XPS foam to be GREENGUARD Gold Certified and the first XPS foam certified by Scientific Certification Systems (SCS) to contain a minimum of 20 percent recycled content.

  • Dimensions: 1 in. x 2 ft. x 8 ft.
  • Application: Exterior Foundation Walls, Underslab, Foundations and Crawlspaces
  • Designed to resist moisture and helps to block mildew
  • Has a higher R-value than wood fiber, plywood or 1/2 in. gypsum board products
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

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Customer Questions & Answers

16 Questions27 Answers

Customer Questions & Answers

FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing

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4 answers

what is the density (#/Qu ft) and is it paintable

This question is from FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
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NJ
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January 18, 2016
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Answers (4)

Asked by
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Home Improvement Profile: Professional
August 16, 2016
Answer: 
Per Owens Corning the FOAMULAR 250 weighs 1.55 lbs per cubic foot; i.e. Density.
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Asked by
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June 14, 2016
Answer: 
Pounds per square foot is pressure, not density, Owens-Corning. He's asking what the density is: Density is weight per volume, pounds per foot. Here's a description of density, Owens Corning, to help you understand: https://en.wikipedia.org/wiki/Density
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January 28, 2016
Answer: 
The Foamular 250 board has 25 pounds per square inch in strength. Yes, it can be painted with the proper paint type.
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Asked by
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January 19, 2016
Answer: 
When people ask about the density of Foamular products, they are often referring to its compressive strength. The Foamular 250 board has 25 pounds per square inch in strength. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will be happy to Read More
When people ask about the density of Foamular products, they are often referring to its compressive strength. The Foamular 250 board has 25 pounds per square inch in strength. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will be happy to assist you as well. Thank you for your inquiry! Read Less
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2 answers

Doe this insulation help with noise reduction?

This question is from FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
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Elizabeth, NJ
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February 2, 2016
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February 8, 2016
Answer: 
This product does not help with noise reduction.
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February 3, 2016
Answer: 
Foamular Insulating Sheathing is not tested for having any acoustic benefits. You may want to consider using a fiberglass insulation or one of our QuietZone products for your application. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will Read More
Foamular Insulating Sheathing is not tested for having any acoustic benefits. You may want to consider using a fiberglass insulation or one of our QuietZone products for your application. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will be happy to assist you as well. Thank you for your inquiry! Read Less
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2 answers

can I use this on the ceiling of my garage ?? To warm up the bedrooms above the garage.

This question is from FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
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Ny,ny
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October 19, 2015
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Asked by
Massachusetts
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Home Improvement Profile: DIYer
November 15, 2015
Answer: 
Dear PJ: Yes, Foamular XPS foam board is a good solution for your garage ceiling. Here are a few tips:
(1) Depending on how cold it is where you live, the best approach would be to start by fastening 2" thick pieces of Foamular to the subfloor, between the joists. Seal all of the edges and joints carefully to block air leaks, with the 'Windows and Doors' version of Great Stuff foam -- which remains Read More
Dear PJ: Yes, Foamular XPS foam board is a good solution for your garage ceiling. Here are a few tips:
(1) Depending on how cold it is where you live, the best approach would be to start by fastening 2" thick pieces of Foamular to the subfloor, between the joists. Seal all of the edges and joints carefully to block air leaks, with the 'Windows and Doors' version of Great Stuff foam -- which remains flexible as things expand, contract and shift.
(2) Then apply 1" sheets of Foamular over the bottom of the floor joists, to completely cover the wood (which is a good conductor of heat / cold). Again, seal all of the joints and edges carefully to block air leaks, with a generous layer of DAP 230.
(3) If you need to save money, just apply 2" thick sheets of Foamular to the bottom of your floor joists, and seal the edges and joints carefully to block air leaks, with a generous layer of DAP 230.
(4) As the Owens Corning rep noted, foam board is flammable and MUST be covered by a thermal barrier in your garage. Simply install 1/2" drywall over the foam board.
We recently completed a deep remodel in Massachusetts and used Foamular to upgrade the insulation inside and outside. A couple of photos are attached.
I hope this is helpful.
Mark Read Less
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Asked by
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October 20, 2015
Answer: 
Owens Corning Foamular is considered combustible, and is required by code to be covered by a 15 minute thermal barrier such as drywall or gypsum. Unfortunately is cannot remain exposed. I hope this information was helpful. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT Read More
Owens Corning Foamular is considered combustible, and is required by code to be covered by a 15 minute thermal barrier such as drywall or gypsum. Unfortunately is cannot remain exposed. I hope this information was helpful. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will be happy to assist you as well. Thank you for your inquiry! Read Less
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2 answers

If used horizontally under plywood as a floor insulator, does this need to be secured with nails/screws or not?

This question is from FOAMULAR 250 1 in. x 2 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
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New Jersey
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October 14, 2015
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Asked by
Massachusetts
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October 18, 2015
Answer: 
Dear James: No, you do not need to fasten Foamular foam board to your concrete pad or subfloor. A few tips:
(1) Sealing air leaks is almost as important a R value. Be sure to install the foam board so that the panels fit snugly against the walls and each other. Seal all of the seams and joints carefully with Great Stuff 'Windows and Doors' or DAP 230 -- which remain flexible after they cure, to prevent Read More
Dear James: No, you do not need to fasten Foamular foam board to your concrete pad or subfloor. A few tips:
(1) Sealing air leaks is almost as important a R value. Be sure to install the foam board so that the panels fit snugly against the walls and each other. Seal all of the seams and joints carefully with Great Stuff 'Windows and Doors' or DAP 230 -- which remain flexible after they cure, to prevent cracks as things expand and contract.
(2) If this is a basement installation and there is any hint of a water problem, install DriCore panels first -- followed by foam board and plywood. DriCore has a rubber layer on the bottom and spaces for water to move toward a drain. See: DRIcore Model # CDGNUS750024024 Internet # 202268752 Store SKU # 361018 Seal all of the joints and edges carefully with DAP 230.
I hope this is helpful.
Mark Read Less
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Asked by
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October 15, 2015
Answer: 
There are multiple ways to correctly insulate a floor using Owens Corning Foamular. As long as you are installing the Foamular on a stable surface such as a concrete floor or other similar proper subfloor, one possibility could be to install the Foamular as a floating floor with a Minimum of a 3/4" subfloor on top. It is up to you to determine the best method for your application. If you have any further Read More
There are multiple ways to correctly insulate a floor using Owens Corning Foamular. As long as you are installing the Foamular on a stable surface such as a concrete floor or other similar proper subfloor, one possibility could be to install the Foamular as a floating floor with a Minimum of a 3/4" subfloor on top. It is up to you to determine the best method for your application. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will be happy to assist you as well. Thank you for your inquiry! Read Less
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Customer Reviews

Rated 4.7 out of 5 by 6 reviewers.
Rated 5.0 out of 5.0 by Easy to use - works like a charm I recently used this to insulate the interior of my basement. It went up easily. In fact, it went up so quickly that insulating the basement was the most satisfying part of the entire basement finishing project. When needed I trimmed with a utility knife before using adhesive to stick these to the cinder block walls. I did not think of my basement as cold before this work, but I noticed a difference immediately - it is now the coziest room in the house. I would use this stuff again in a heartbeat. I spent a great deal of time reviewing the various insulation options before choosing foamular XPS. So glad I made this choice. The combination of ease of use, effective insulation, and ability to use below grade made this exactly what I needed. February 21, 2016
Rated 5.0 out of 5.0 by Very Satisfied Very Easy to install. will definitely buy this product again. we noticed a difference immedately after installing this in our basement. January 5, 2014
Rated 4.0 out of 5.0 by Misinfomation I needed to fill in a misplaced window. I used this product to insulate the outside. Since the outside of the project was inside my garage I asked the employee that was helping me if this product was paintable. I was told it was and used a waterproof primer/paint spray. It was melting the board. It wasn't major but I would recomend some sort of over boarding or paneling if you want to paint for weatherproofing. In all I liked the product's ease of instillation, and was impressed at the insulationing effect for my kitchen. September 3, 2015
Rated 4.0 out of 5.0 by Dood Stuff Does the job. I installed it on the underground walls of the basement. This winter my laser temperature gun showed room temperature on the foam and 5 to 10 degrees lower on adjacent uninsulated wall. I used 2 inch foam board on above ground walls with similar results. May 19, 2015
Rated 5.0 out of 5.0 by Expensive but efficient I used this to muffle the sound of an inline fan on a false wall and it worked great. it's very easy to work with which is why i pay for it but on the expensive side for insulation. February 12, 2015
Rated 5.0 out of 5.0 by this product is awsome Do you want to save energy, this will do it. Its tough and the r value is very good compared to the other products and easy to install. Thanks home depo for another great item May 1, 2012
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