Internet #100320356

Model # 36L

Store SKU #409923

Store SO SKU #192627

0748232100036

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

  • Saves energy and resists moisture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Strong, lightweight pink foam panels don't require special tools
$ 14 90

Frequently Bought Together

Frequently Bought Together

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Product Overview

icon or arm with muscle

Strong And Durable

FOAMULAR® XPS is stronger and more flexible than EPS.

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Resistant To Mold & Moisture

FOAMULAR® XPS has up to 13x better water resistance than EPS.

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Easy To Cut, Form & Fit

FOAMULAR® XPS cuts cleaner and doesn't break apart or crumble like EPS.

man installing Foamular in a basement

Insulating Basement Walls

Without adequate insulation, it’s difficult to heat and air-condition a basement room effectively. Owens Corning® FOAMULAR® is the easy-to-install, efficient solution for insulating basement walls.

Man preparing to install Foamular in a crawlspace

Insulating Crawlspace Walls

Because heat m.igrates to cold through the bottom of the house, an uninsulated crawlspace means you’ll use more energy to heat your home during winter and to cool it in summer. Insulate your crawlspace with Owens Corning® FOAMULAR®.

Man installing Foamular in a garage ceiling

Insulating Garage Or Bonus Room

Use Owens Corning® FOAMULAR® to insulate your garage ceiling / bonus room floor to effectively condition the space.

Man installing Foamluar on an exterior wall surface

Insulating Exterior Facing Wall Cavity

Owens Corning® FOAMULAR® provides a higher R-value per inch than other materials commonly used for wall cavity insulation.

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Warranty

Warranted to retain at least 90% of its advertised R-value over the lifetime of the product - Industry leading warranty across all thicknesses and compressive strengths.

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R-Value

The R-value for insulation measures how well insulation materials can resist heat - the higher the R-value, the greater the insulation performance. FOAMULAR is best ­ at maintaining R-value where moisture is present.

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Third Party Certifications

FOAMULAR is certified for Recycled Content and Air Quality by esteemed third party organizations.

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Make More Possible

Owens Corning is a global leader in engineered materials for roofing, insulation and composites.

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World Class Sustainability

For us, sustainability is about meeting the needs of the present while leaving the world a better place for the future.

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OC Gives Back

We make a difference by empowering people and the communities in which we live and work.

  • Saves energy and resists moisture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Strong, lightweight pink foam panels don't require special tools
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 shop Loctite foamboard adhesive
  • FOAMULAR 150 and 250 are available in various thicknesses and R-values, the difference is the compressive strength. FOAMULAR 150 has a compressive strength of 15 psi and FOAMULAR 250 is 25 psi
  • FOAMULAR is not rated for STC (sound transmission) and does not have any soundproofing properties. Owens Corning fiberglass batts and rolls are great options for acoustic applications.
  • FOAMULAR is a vapor retarder, not a vapor barrier. Please check your local building codes for vapor barrier/retarder requirements.
  • If being used in an interior construction application, painting the FOAMULAR is not recommended as FOAMULAR cannot be left exposed and will need to be covered by a 15 minute thermal barrier such as drywall.
  • If being used for crafts, oil-based and latex paints can be used with FOAMULAR products.
  • If you’re looking to insulate your garage door, Owens Corning Garage Door Insulation Kit is an easy, fast and affordable way to keep your garage warm in winter and cool in the summer.
  • If you’re looking to ventilate your attic rafters, Owens Corning Raft-R-Mate is a XPS foam vent designed to assure unrestricted airflow from the soffit to the ridge vent.
  • FOAMULAR is available in two edge configurations:
  • Square Edge – designed to fit flush next to adjoining boards
  • Scored Square Edge - comes with 3 factory scores, so that you can take a 4’ sheet, break it in two and have two, 2’ wide sheets (middle score), or you can break it into three 16” wide pieces by snapping at the left and right score.
  • Click here to shop Loctite foamboard adhesive
  • Click here to learn more about Eco Options and Energy Efficiency

Product Overview

  • Saves energy and resists moisture with limited lifetime warranty
  • Blocks mildew, corrosion and rot; easy to cut and install
  • Strong, lightweight pink foam panels don't require special tools
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 shop Loctite foamboard adhesive
  • FOAMULAR 150 and 250 are available in various thicknesses and R-values, the difference is the compressive strength. FOAMULAR 150 has a compressive strength of 15 psi and FOAMULAR 250 is 25 psi
  • FOAMULAR is not rated for STC (sound transmission) and does not have any soundproofing properties. Owens Corning fiberglass batts and rolls are great options for acoustic applications.
  • FOAMULAR is a vapor retarder, not a vapor barrier. Please check your local building codes for vapor barrier/retarder requirements.
  • If being used in an interior construction application, painting the FOAMULAR is not recommended as FOAMULAR cannot be left exposed and will need to be covered by a 15 minute thermal barrier such as drywall.
  • If being used for crafts, oil-based and latex paints can be used with FOAMULAR products.
  • If you’re looking to insulate your garage door, Owens Corning Garage Door Insulation Kit is an easy, fast and affordable way to keep your garage warm in winter and cool in the summer.
  • If you’re looking to ventilate your attic rafters, Owens Corning Raft-R-Mate is a XPS foam vent designed to assure unrestricted airflow from the soffit to the ridge vent.
  • FOAMULAR is available in two edge configurations:
  • Square Edge – designed to fit flush next to adjoining boards
  • Scored Square Edge - comes with 3 factory scores, so that you can take a 4’ sheet, break it in two and have two, 2’ wide sheets (middle score), or you can break it into three 16” wide pieces by snapping at the left and right score.
  • Click here to shop Loctite foamboard adhesive
  • Click here to learn more about Eco Options and Energy Efficiency

Info & Guides

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Compare Similar

Compare Similar Products
Brand R-Matte Owens Corning Owens Corning Owens Corning
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 FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Scored Square Edge Rigid Foam Board Insulation Sheathing FOAMULAR 150 1-1/2 in. x 4 ft. x 8 ft. R-7.5 Scored Squared Edge Rigid Foam Board Insulation Sheathing
Price
$13.35
$15.97
$19.84
$22.31
Ratings (196) (143) (336) (197)
Sheathing Type ISO XPS XPS XPS
Insulation Location 2x4 Wall,2x6 Wall,Attic,Basement,Ceiling Insulation,Crawlspace,Exterior Sheathing,Garage,Re-Siding Exterior Sheathing Exterior Wall Exterior Wall Foundation
Product Width (in.) 48 in 48 in 48 in 48 in
Product Length (ft.) 8 ft 8 ft 8 ft 8 ft
Insulation R-Value R3.2 R3 R5 R7.5
Faced or Unfaced Faced Faced Unfaced Unfaced
Insulation Features Formaldehyde Free Formaldehyde Free Formaldehyde Free Formaldehyde Free
Product Thickness (in.) .5 in 0.5 in 1 in 1.5 in
Compatible Install Surface Cement,Existing Drywall,Wood Plywood,Wood
View Product View Product View Product View Product

Specifications

Dimensions

Coverage Area (Sq.Ft)
32
Product Length (ft.)
8 ft
Product Thickness (in.)
0.5 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free
Insulation Location
Exterior Sheathing
Insulation R-Value
R3
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Number of Pieces
1
Product Weight (lb.)
2.7 lb
Sheathing Size
8 ft. x 0.5 in. x 48 in.
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Limited Lifetime

Specifications

Dimensions

Coverage Area (Sq.Ft)
32
Product Length (ft.)
8 ft
Product Thickness (in.)
0.5 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free
Insulation Location
Exterior Sheathing
Insulation R-Value
R3
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Number of Pieces
1
Product Weight (lb.)
2.7 lb
Sheathing Size
8 ft. x 0.5 in. x 48 in.
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Limited Lifetime

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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