0748232100036

Owens Corning

Model 36L

Internet #100320356

Store SKU #409923

Store SO SKU #192627

FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing

  • Film faced for damage resistance, easy to handle, cut and install
  • Compressive strength of 15 psi, R-value of 3
  • Lifetime Limited Warranty for the life of the home

Frequently Bought Together

Product Overview

Choosing The Right Insulation

Faced Insulation

Faced

Face insulation uses kraft paper vapor barrier to control moisture transmission between 
walls and floors 

*Check your local building code for requirements
Unfaced Insulation

Unfaced

Unfaced insulation does not have a vapor barrier; used over existing insulation in the attic, or where moisture control is not needed

Rolls Insulation

Rolls

Continuous rolls are easy to transport and can be cut to length; great for large areas

Batts Insulation

Batts

Come in pre-cut lengths for faster installation and each package contains more square feet than rolls; ideal for framed cavities

Blow-In Insulation

Blow-In Insulation

Installed using blowing machines, best for adding additional insulation in attic

Regional R-Values

Regional R-Values Map

The Department of Energy recommends different insulation
levels based on regional climate zones to increase energy efficiency

Map key with insulation type based on region

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: 1/2 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

Info & Guides

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Specifications

Dimensions

Details

Warranty / Certifications

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Customer Questions & Answers

49 Questions61 Answers

Customer Questions & Answers

FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing
FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing

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2 answers

can shingles be installed over this?

This question is from FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing
Asked by
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August 23, 2016
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Asked by
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August 24, 2016
Answer: 
Foamular is not meant to act as a roof sheathing on which shingles can be installed. Foamular can be used in some roofing applications as an insulating material, but rarely on residential roofs. If you have specific design questions, please call 1-800-GET-PINK to speak with a product specialist. You may also contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Read More
Foamular is not meant to act as a roof sheathing on which shingles can be installed. Foamular can be used in some roofing applications as an insulating material, but rarely on residential roofs. If you have specific design questions, please call 1-800-GET-PINK to speak with a product specialist. You may also 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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August 23, 2016
Answer: 
This product is for placing underneath vinyl siding/claddings.
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2 answers

can this be applied over asbestos siding before applying vinyl siding.

This question is from FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing
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Essexville Mi
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June 22, 2016
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Asked by
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June 24, 2016
Answer: 
We cannot recommend you install Foamular in a way that will disturb asbestos containing material. You may want to contact a building code inspector to see what they advise. You can also check with the EPA at https://www.epa.gov/asbestos/protect-your-family for their recommendations. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they Read More
We cannot recommend you install Foamular in a way that will disturb asbestos containing material. You may want to contact a building code inspector to see what they advise. You can also check with the EPA at https://www.epa.gov/asbestos/protect-your-family for their recommendations. 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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June 23, 2016
Answer: 
The framed assembly or masonry surface onto which the Insulation is to be applied must be flat. FOAMULAR Insulation is a rigid product and
not intended for uneven surface.
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2 answers

can I put the foamular 1" thick between concrete block and sheetrock?

This question is from FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing
Asked by
Salina Kansas
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February 24, 2016
do I need a vapor barrier with it also.
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Asked by
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February 25, 2016
Answer: 
Installing Foamular on a concrete wall and covering with sheet rock is an acceptable application. Any construction adhesive compatible with extruded polystyrene will fix the foam board to the block. Covering with sheet rock would provide a suitable finish and act as a fire barrier to protect the board. You may want to consult local building codes for vapor barrier requirements. Those are very specific Read More
Installing Foamular on a concrete wall and covering with sheet rock is an acceptable application. Any construction adhesive compatible with extruded polystyrene will fix the foam board to the block. Covering with sheet rock would provide a suitable finish and act as a fire barrier to protect the board. You may want to consult local building codes for vapor barrier requirements. Those are very specific with regard to the region of the country and the area of the building in question. 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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February 24, 2016
Answer: 
Yes, you could put this between concrete and sheetrock.
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2 answers

attic use.

This question is from FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing
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October 18, 2015
Is this fire proof or flame retardant?
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Asked by
Salt Lake City, UT
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October 20, 2015
Answer: 
Not in the least. When installed, it must be covered with drywall or other flame-retardant material.
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Asked by
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October 20, 2015
Answer: 
Owens Corning Foamular does currently contain an HBCD flame retardant in our Foamular products, however it is Not considered fire proof. They are currently working on an alternative substitute that has not yet been confirmed. The current product is still considered combustible and is required by code to be covered by a 15 minute thermal barrier such as drywall or gypsum board.
If you have any further
Read More
Owens Corning Foamular does currently contain an HBCD flame retardant in our Foamular products, however it is Not considered fire proof. They are currently working on an alternative substitute that has not yet been confirmed. The current product is still considered combustible and is required by code to be covered by a 15 minute thermal barrier such as drywall or gypsum board.
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!
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Customer Reviews

Rated 4.6 out of 5 by 8 reviewers.
Rated 4.0 out of 5.0 by Good for art! My school uses them to do the big art fair and they can be used more than one year in a row. Very durable! March 18, 2016
Rated 5.0 out of 5.0 by Used for birthday party decorations I bought 3 of these sheets for my sons first birthday party! It was a jungle/safari themed and I sent them out to my friends bf to paint some animals. He did a mural/background typed n I used it as a backdrop for the chocolate fountain table. The other two were giraffes that I put on bushes since the party was on our backyard. This year doing a Mickey Mouse themed n I'm going to buy some of these sheets!! March 19, 2013
Rated 5.0 out of 5.0 by foam sheeting I love this stuff, it has a great color! I love pink, but seriously, this stuff is as soothing to place against a wall as it is too look at! It seals perfectly, last forever, and is so cleanto work with. We love using this for all our insulating work, and prefer it for the price to the other options. We have a notable difference in the heating and cooling benifits it makes, and our lives are richer because of the clean and effective insulating factor it has. August 23, 2010
Rated 5.0 out of 5.0 by Used for new application Used this to temporarily cover a hole in the ceiling while we wait for spring to do roof repairs. Board very light, easy to screw into studs, completely waterproof. Much easier to use than plywood or drywall and much sturdier than a plastic sheet! Also kept the room warm! March 11, 2014
Rated 5.0 out of 5.0 by can be used in so many ways Cover boards with your choice of damask fabric and hang on wall for a custom art piece. So cool . June 20, 2013
Rated 5.0 out of 5.0 by purchased to insulate inside wall used this product to insulate inside walls of remodel room. helped to cool off room and helped make it a little more quiet as well. June 20, 2013
Rated 4.0 out of 5.0 by great for a model railroad This insulation is great for a base for a model railroad. Make sure you pull the lamination sheet off first. That comes off easily. It is easy to work with and easy to cut. December 27, 2011
Rated 4.0 out of 5.0 by XCELLENT FOAMY RC AIRPLANE STUFF THIS STUFF IS GREAT FOR ANYBODY INTERESTED IN MAKING A FUN RC AIRCRAFT. LET YOUR IMAGINATION GO WILD. CHEAP AND EASY TO FIX. November 25, 2011
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