Model # 68WD

Internet #100320355

Store SKU #409959

Store SO SKU #192627

Owens Corning FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
0748232100012

Owens Corning

FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing

  • Closed cell rigid foam board, easy to handle, cut and install
  • Compressive strength of 15 psi, R-value of 5
  • Lifetime Limited Warranty for the life of the home

Frequently Bought Together

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 4 ft. x 8 ft.
  • Application: Exterior Sheathing & Interior Basement Walls
  • 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

Info & Guides

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Customer Questions & Answers

31 Questions43 Answers

Customer Questions & Answers

FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing

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3 answers

Is this material flamable and if installed on basement wall, should it be covered with dry wall or can be kept open?

This question is from FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
Asked by
soni
Crystal lake, IL
May 15, 2013
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Answers (3)

Asked by
Omaha
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November 24, 2015
Answer: 
All residential building codes require that this product be covered with a thermal barrier, which the code prescribes as drywall at least 1/2" thick. You cannot leave it exposed and comply with the code.
The foam product is flammable and the purpose of the drywall is to keep it from burning and killing you with fumes.
The applicable section of the 2006 International Residential Code:
R314.4 Thermal Read More
All residential building codes require that this product be covered with a thermal barrier, which the code prescribes as drywall at least 1/2" thick. You cannot leave it exposed and comply with the code.
The foam product is flammable and the purpose of the drywall is to keep it from burning and killing you with fumes.
The applicable section of the 2006 International Residential Code:
R314.4 Thermal barrier. Unless otherwise allowed in Section
R314.5 or Section R314.6, foam plastic shall be separated from
the interior of a building by an approved thermal barrier of minimum
0.5 inch (12.7 mm) gypsum wallboard or an approved
finish material equivalent to a thermal barrier material that will
limit the average temperature rise of the unexposed surface to
no more than 250°F (139°C) after 15 minutes of fire exposure
complying with the ASTM E 119 standard time temperature
curve. The thermal barrier shall be installed in such a manner
that it will remain in place for 15 minutes based on NFPA 286
with the acceptance criteria of Section R315.4, FM 4880, UL
1040 or UL 1715.
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Asked by
Left Coast
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June 15, 2013
Answer: 
It's a plastic, so it would melt and burn. I would sure cover it.
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May 16, 2013
Answer: 
Yes. Foamular is flamable, and should not be left exposed. It should be covered with a 15-minute thermal barrier such as drywall, or OSB board.
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3 answers

does this insulation only sell individually or is there a pack?

This question is from FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
Asked by
morganw
Sidney, AR
March 12, 2013
I need to insulate a 10x20 cabin. I'm looking for the best option.
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Answers (3)

Asked by
Lynchburg, VA, USA
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March 25, 2014
Answer: 
You can buy in any quantity. It may depend on you home improvement center.
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Asked by
Left Coast
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June 15, 2013
Answer: 
If you are buying enough to insulate a cabin, then you probably want the thicker sheets, and to pro-deal a bulk purchase.
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March 13, 2013
Answer: 
Typically, foamular is sold per sheet, but would depend on the store. You can speak with The Home Depot in your area to find out if they sell Foamular in bundles or sheets.
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2 answers

Is this product toxic when using electric cutting tools?

This question is from FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
Asked by
Buffalo, Tx.
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March 14, 2016
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Answers (2)

Asked by
Massachusetts
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Home Improvement Profile: Professional
August 30, 2016
Answer: 
Dear Reeder: No, but a standard toothed circular saw blade will create lots of foam particles that stick to everything and create a real mess. Foam board is also very flammable, so all of these bits of foam are a fire risk. It is much easier and safer to cut foam board with an 'insulation knife'. You simple score one side deeply with the knife, then break the board over a sawhorse or table edge. Home Read More
Dear Reeder: No, but a standard toothed circular saw blade will create lots of foam particles that stick to everything and create a real mess. Foam board is also very flammable, so all of these bits of foam are a fire risk. It is much easier and safer to cut foam board with an 'insulation knife'. You simple score one side deeply with the knife, then break the board over a sawhorse or table edge. Home Depot sells insulation knives. See: Milwaukee Model 48-22-1921, Home Depot Internet #205935391 Store SKU #1001411650

I hope this is helpful.

Mark
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Asked by
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March 15, 2016
Answer: 
There is no harm in using electronic cutting tools with our Foamular Insulation. There are many acceptable methods for cutting the product including using a razor knife, hand sawing, or using a circular saw. It is always recommended to use protective eye wear and face mask to guard against small particles thrown during the cutting process. If you have any further questions, please feel free to contact a Read More
There is no harm in using electronic cutting tools with our Foamular Insulation. There are many acceptable methods for cutting the product including using a razor knife, hand sawing, or using a circular saw. It is always recommended to use protective eye wear and face mask to guard against small particles thrown during the cutting process. 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 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 product under a basement concrete slab?

This question is from FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Tongue and Groove Insulation Sheathing
Asked by
Rockford, Mn
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October 5, 2015
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Answers (2)

Asked by
Massachusetts
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Home Improvement Profile: DIYer
October 6, 2015
Answer: 
Dear Prattsky: As the Owens Corning rep noted, the retail "150" version of Foamular is typically not used under concrete slabs. XPS foam board is a very popular insulation solution under concrete, however, and it won't take an engineer to figure out which version would be best for your application.
There are four versions of Foamular XPS foam board, which are all available from your Home Depot's Read More
Dear Prattsky: As the Owens Corning rep noted, the retail "150" version of Foamular is typically not used under concrete slabs. XPS foam board is a very popular insulation solution under concrete, however, and it won't take an engineer to figure out which version would be best for your application.
There are four versions of Foamular XPS foam board, which are all available from your Home Depot's Customer Service / Pro desk: 150, 250, 400, 600 and 1000 -- with compressive strengths of 15, 25, 40, 60 and 100 PSI. Foamular 250 is typically used under residential slabs and Foamular 450 and 600 are common in commercial applications. For the details do a Web search for "Foamular Foundation Properties for Load Bearing Slab Applications" and "Rigid Foam Board Applications" on the Foamular dot com website.
The foam board should also be installed like a tray under your slab, with a vertical 'rim' around the edge that will isolate the slab floor from the concrete foundation wall. A diagram is attached showing a typical assembly. The contractor that places your concrete foundation walls and slab should be familiar with the installation requirements and details.
I hope this is helpful.
Mark Read Less
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Asked by
Read all my Q&A
October 6, 2015
Answer: 
Using Owens Corning Foamular 150 under slab is Not a recommended use for this product. It has a compression strength of 15 psi. An engineer has to determine the loads that your application will endure, and then based off that calculation you can determine which compression strength Foamular you would need. Typically it will be a Foamular 250 (25 psi)or higher, however again, an engineer has to determine. Read More
Using Owens Corning Foamular 150 under slab is Not a recommended use for this product. It has a compression strength of 15 psi. An engineer has to determine the loads that your application will endure, and then based off that calculation you can determine which compression strength Foamular you would need. Typically it will be a Foamular 250 (25 psi)or higher, however again, an engineer has to determine. 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 4.8 out of 5 by 5 reviewers.
Rated 4.0 out of 5.0 by Great product, but a little messy Easy to cut, easy to install, but a little messy when cutting. Some light vacuuming or sweeping will cover it. Great product overall. Very happy with it. June 11, 2014
Rated 5.0 out of 5.0 by Overall good product. I find that if you use a razor knife to cut this product use one that is long enough to cut all the way thru the 1" thickness. Being the first time I have used this product I cannot compare it to anything else. I will buy it again. March 25, 2014
Rated 5.0 out of 5.0 by Window Insulation We're renting a house with old single pane (draft chamber) windows. I got a couple sheets of this 1" insulation, and cut it to fit snugly inside the window frame. At night, the sheets go up behind the blinds for a noticable improvement in the room temps for very little $. An easy, inexpensive improvement, that we'll be able to move to the next house, hopefully our own. April 8, 2013
Rated 5.0 out of 5.0 by Versatile Product This product has uses beyond its intended use. It works great for model building besides insulation. Easy to work with, no little plastic beads flying around. Is easily formed and shaped. It is very versatile. January 28, 2014
Rated 5.0 out of 5.0 by Great stuff Used this under the floor of my peir and beam home to insulate the bathroom floors. Cut easily and I was able to tack it to the beams with ease. Compaired to last year a tthis time the floors are much cozier to walk on bare foot. November 22, 2009
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