Internet #100320356

Model # 36L

Store SKU #409923

Store SO SKU #192627

0748232100036

Owens Corning

FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Square Edge Rigid Foam Board Insulation Sheathing

  • Saves energy and resists moisuture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Closed cell XPS foam panel can be layered for more cost savings
$ 14 90
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Frequently Bought Together

Frequently Bought Together

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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
  • Saves energy and resists moisuture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Closed cell XPS foam panel can be layered for more cost savings
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
  • Click here to learn more about Eco Options and Energy Efficiency

Product Overview

  • Saves energy and resists moisuture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Closed cell XPS foam panel can be layered for more cost savings
Model #: 36L
Sku #: 409923
Internet #: 100320356

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

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Key Features

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

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
Product Overview
Key Features

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
  • Saves energy and resists moisuture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Closed cell XPS foam panel can be layered for more cost savings
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
  • Click here to learn more about Eco Options and Energy Efficiency

Product Overview

  • Saves energy and resists moisuture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Closed cell XPS foam panel can be layered for more cost savings
Model #: 36L
Sku #: 409923
Internet #: 100320356

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

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

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

Compare Similar

Compare Similar Products
Brand R-Matte Owens Corning R-Tech Amvic
Name Rmax R-Matte Plus-3 1/2 in. x 4 ft. x 8 ft. R-3.2 Polyisocyanurate Rigid Foam Insulation Board FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Square Edge Rigid Foam Board Insulation Sheathing 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation Multipurpose High Density Insulation Kit R10 2-3/8 in. x 24 in. x 48 in. (5-Panels)
Price
$13.35
$14.90
$20.98
$50.99
Ratings (97) (109) (113) (46)
Sheathing Type ISO XPS EPS EPS
Insulation Location 2x4 Wall,2x6 Wall,Attic,Basement,Ceiling,Crawlspace,Exterior Sheathing,Garage,Re-Siding 2x4 Wall,2x6 Wall,Exterior Sheathing 2x4 Wall,2x6 Wall,Attic,Basement,Crawlspace,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab Basement,Exterior Wall Foundation,Floor,Garage,Under Slab
Product Width (in.) 48 in 48 in 48 in 48 in
Product Length (ft.) 8 ft 8 ft 8 ft 10 ft
Faced or Unfaced Faced Faced Faced Unfaced
Product Thickness (in.) .5 in .5 in 2 in 2.375 in
View Product View Product View Product View Product

Specifications

Dimensions

Coverage Area (sq. ft.)
32 ft²
Product Length (ft.)
8 ft
Product Thickness (in.)
.5 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free,Vapor Retardant
Insulation Location
2x4 Wall,2x6 Wall,Exterior Sheathing
Insulation R-Value
R3
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Product Weight (lb.)
2.7 lb
Sheathing Size
8 ft. x .5 in. x 48 in.
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Lifetime Limited

Specifications

Dimensions

Coverage Area (sq. ft.)
32 ft²
Product Length (ft.)
8 ft
Product Thickness (in.)
.5 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free,Vapor Retardant
Insulation Location
2x4 Wall,2x6 Wall,Exterior Sheathing
Insulation R-Value
R3
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Product Weight (lb.)
2.7 lb
Sheathing Size
8 ft. x .5 in. x 48 in.
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Lifetime Limited

Questions & Answers

Can this insulation be used to insulate a 8x12 storage shed?

Can this insulation be used to insulate a 8x12 storage shed?
Asked by: PlatoonSgt
Yes, you can use this insulation for such a purpose so long as you install it properly.
Answered by: CommunityAnswer
Date published: 2019-01-25

Can it be installed before insulation and drycwall on remidel home.

We are doing a remodel. Can we put this up between studs before we install the insulation and dry wall ?
Asked by: Okie
It is meant to be placed under siding on the outside of the plywood. It is just extra insulation. Not meant for in between studs.
Answered by: Paulette
Date published: 2018-01-06

can it be used under vinyl flooring?

Asked by: paul
I would think not. It is 2" thick and is somewhat compressible but it will permanently deform, not bounce back, so no I would not pout it under a floor that is itself, resilient. Rob
Answered by: Bob
Date published: 2018-09-18

Where can I find this?? I’ve been to 5 different states and have not had luck finding this!!

Asked by: Keri
Setup your location in homedepot.com and or call the store if they have it.
Answered by: Gilbertfg
Date published: 2018-08-16
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Customer Reviews

FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Square Edge Rigid Foam Board Insulation Sheathing is rated 4.7 out of 5 by 109.
Rated 5 out of 5 by from I used Foamular 1/2" x 4'x8' for a crafts project. I needed to put a 3D map of the world on a wa... I used Foamular 1/2" x 4'x8' for a crafts project. I needed to put a 3D map of the world on a wall, along with some other things on plaques. This product was perfect for both. I used a utility knife (sharp blade required) to cut all the straight edges, and used a hot cutting tool to cut out the map. I sealed all the cut pieces with a sealer, then painted them with water-based paints. The product is so light weight it will be easy to mount the components on a wall. So glad I found this product. It's not the purpose it was made for, but hopefully many crafters will appreciate the ideas. They can also find some tips on YouTube to help avoid some mistakes in craft projects.
Date published: 2019-08-06
Rated 4 out of 5 by from The thin plastic outer coating protects the board but you need to keep your cutter sharp or it sn... The thin plastic outer coating protects the board but you need to keep your cutter sharp or it snags and tears the film.
Date published: 2019-07-31
Rated 5 out of 5 by from Easy to work with and provided a great layer of... Easy to work with and provided a great layer of insulation so that my workshop AC unit is far more effective.
Date published: 2019-08-06
Rated 5 out of 5 by from So far, so good. I will get a real feel for the performance of this insulation come fall and wint... So far, so good. I will get a real feel for the performance of this insulation come fall and winter.
Date published: 2019-07-16
Rated 5 out of 5 by from Used this as packing material along with corrugated box for... Used this as packing material along with corrugated box for original paintings I make and ship.
Date published: 2019-06-13
Rated 5 out of 5 by from The product was just what I needed and the r... The product was just what I needed and the r factor was much more than expected.
Date published: 2019-06-11
Rated 3 out of 5 by from It is somewhat high price for foam board, and the... It is somewhat high price for foam board, and the quality is about average.
Date published: 2019-06-11
Rated 5 out of 5 by from Thick, Sturdy, easy to work with and apply... Thick, Sturdy, easy to work with and apply
Date published: 2019-07-03
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