Model # 37L

Internet #100320340

Store SKU #104863

Store SO SKU #192627

Owens Corning FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing
0748232100111

Owens Corning

FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing

  • Film faced for damage resistance, easy to handle, cut and install
  • Compressive strength of 15 psi, R-value of 4
  • 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: 3/4 in. x 4 ft. x 8 ft.
  • Application: Exterior Above Grade Walls, Underneath vinyl siding / claddings
  • Closed cell rigid foam board, 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

31 Questions46 Answers

Customer Questions & Answers

FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing
FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing

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4 answers

I am considering this product to insulate a garage closet. For fire purposes, would it need to necessariy be covered? Can it be painted?

This question is from FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing
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panama city fl
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January 30, 2014
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Asked by
Ocala
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Home Improvement Profile: Professional
November 1, 2014
Answer: 
I has to be covered with 1/2 drywall to meet building code. This product is very toxic if it burns in side your home "It will kill you" if the fumes are inhaled
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Asked by
FW, TX
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Home Improvement Profile: Professional
February 18, 2014
Answer: 
It would need to be fire protected and most paints will dissolve it. Maybe some water base paints will not but I would test a patch first because even water base paints have a fast evaporating solvent in them that may affect the board. But it still needs to be fire protected.
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Asked by
Wauwatosa, WI, USA
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January 31, 2014
Answer: 
It can be easily damaged so you could paint it, but if you bump it, it will dent and the paint will get damaged. Chemically it is like Styrofoam, it will burn. Personal I would cover it with drywall.
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January 31, 2014
Answer: 
With few exceptions, most building codes will require any foam plastic insulation to be covered by a 15 minute thermal barrier. You can check with the code office to see if that specific situation would be allowed but almost always it will need to be covered.
As far as painting, Foamular can be painted with water based or latex based paint. Paint will stick to Foamular, but painting is not an Read More
With few exceptions, most building codes will require any foam plastic insulation to be covered by a 15 minute thermal barrier. You can check with the code office to see if that specific situation would be allowed but almost always it will need to be covered.
As far as painting, Foamular can be painted with water based or latex based paint. Paint will stick to Foamular, but painting is not an appropriate protection against UV rays or fire-rated covering. In most uses Foamular must be covered, so painting is unnecessary. Read Less
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3 answers

is this rated at 25 pounds per square inch?

This question is from FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing
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3/4
April 2, 2013
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Asked by
FW, TX
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February 18, 2014
Answer: 
I don't know what you want to know and don't know about compression but has almost none tensile or shear strength. Place a piece between two separated four by fours and step in the middle and see if you are satisfied about the strength.
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Asked by
Columbus, OH, USA
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April 4, 2013
Answer: 
Owens Corning states in its technical specifications that it has a minimum of 15 psi. Does not state a max. Hope this helps.
User submitted photo
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April 3, 2013
Answer: 
This product is 15PSI (pounds per square inch). This information can be found on the data sheet for the product located on the Owens Corning Website. Or, The Home Depot in your area, can provide this information to you,
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3 answers

Price? Not in stores? Special Order?

This question is from FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing
Asked by
JeffW
Washington DC
February 8, 2013
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Asked by
FW, TX
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February 18, 2014
Answer: 
In store best. If too many sheets you can easily return extra and no shipping charge either way.
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Asked by
Columbus, OH, USA
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April 4, 2013
Answer: 
It is in many local stores, price varies on location. Usually around $15 a sheet.
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February 12, 2013
Answer: 
Hi JeffW
Thank you for asking. This item is a Home Depot store exclusive, and is not available online. To determine availability you will need to localize the item online by using a zip code. For any other questions, please call us at HomeDepot.com Customer Service 800-430-3376.
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2 answers

Can this be painted to usee as a prop in a theater play

This question is from FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Insulating Sheathing
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July 28, 2016
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Asked by
Toledo, Ohio
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August 26, 2016
Answer: 
Foamular is great for crafts and theater props! It can be painted with water based or latex based paint.
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Asked by
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August 4, 2016
Answer: 
Our Foamular products are compatible with water based or latex based paint.
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Customer Reviews

Rated 4.6 out of 5 by 9 reviewers.
Rated 5.0 out of 5.0 by Did the job! Easy to cut and install. Priced well. Performed as expected. August 23, 2016
Rated 5.0 out of 5.0 by Easy DIY option I have a strange situation here in my addition where there is a closet up next to the exterior wall, of which previously only had paneling directly on the studs with the 3" fiberglass, this was causing a huge amount of heat loss. If you have a similar situation, this will be great for right against the studs, and then wallboard on top of that. (It's recommended online you also use a plastic vapor barrier.) This is working great as extra protection over the 3" fiberglass. This works out to a combined R17, higher is always better, but this cuts down on the cold drafts significantly - more than enough for similar situations. (Tip: Not sure if this is the 'right' way to do this, but on the seems if you have any leaks, as you probably will unless you're an expert at cutting the stuff - use foil HVAC tapes to cover the seems.) January 28, 2014
Rated 5.0 out of 5.0 by does its job purchased 6 sheets to insulate an 8x10 utility shed converted into a cat barn. it has allowed me to turn the thermostat down on the oil heater from previous years. i would say that the barn is now 15-20 degrees warmer than what it's been in the past. i forgot that cats have toenails and enjoy kneading them on each other, me and walls. they've shredded some sheets after 3 months but not severely enough to affect the R value. January 14, 2014
Rated 5.0 out of 5.0 by Vapor barrier(poly) on the inside wall. If you install a vapor barrier (poly or similar material) make sure it is on the cold side and not on the inside. It can be very destructive to your wall construction, causing rapid rot and mold/mildew. This product breaths and is not a vapor barrier. Check with you local city inspector if you aren't sure. February 18, 2014
Rated 4.0 out of 5.0 by Easy to install, lightweight, dual purpose We've not completed the basement yet, but the Foamular went up pretty easy. There was some problems with adhesive not holding but that wasn't this product's issue. some sheets did have a bit of warp to them so it was hard to keep them flat against the wall. We finally used some spare 2x4's to hold the sheets in place overnight until the glue set. October 29, 2013
Rated 3.0 out of 5.0 by Some wrong sizes were in the order The product performs as intended. The quality of the wood pieces allow me to construct a square frame that will enclose the foamular support structure for my canvases. December 11, 2013
Rated 5.0 out of 5.0 by Easy to work with and great insulation I've used this product to insulate the back of my garage door, as well as other applications where full batt inslulation isn't required. It's easy to cut (score and break), lightweight, and easier to work with than fiberglass (no mess). I'd recommend it to anyone. November 14, 2009
Rated 4.0 out of 5.0 by Not perfectly flat, hard to glue in place without bracing Easy to cut, easy install with the right glue, and tape, as long as you brace the board, since it does not lay flat. Just a pain to adhere to vertical services. January 22, 2013
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