Internet #100320301

Model # 21UM

Store SKU #409692

0748232100050

FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Rigid Foam Board Insulation Sheathing

  • Saves energy and resists moisuture with limited lifetime warranty
  • Reduce gaps and eliminate drafts with film faced uniform surface
  • Closed cell XPS foam panel can be layered for more cost savings
$ 54 00
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Saves energy and resists moisuture with limited lifetime warranty
  • Reduce gaps and eliminate drafts with film faced uniform surface
  • 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 and 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% recycled content.
  • Dimensions: 1/4 in. x 4 ft. x 50 ft.
  • Application: backer board for under new or replacement siding
  • Closed cell lightweight foam board
  • Thermal performance of R1



  • Click here to learn more about Eco Options and Energy Efficiency
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Product Overview

  • Saves energy and resists moisuture with limited lifetime warranty
  • Reduce gaps and eliminate drafts with film faced uniform surface
  • Closed cell XPS foam panel can be layered for more cost savings
Model #: 21UM
Sku #: 409692
Internet #: 100320301

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 and 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% recycled content.

  • Dimensions: 1/4 in. x 4 ft. x 50 ft.
  • Application: backer board for under new or replacement siding
  • Closed cell lightweight foam board
  • Thermal performance of R1



  • Click here to learn more about Eco Options and Energy Efficiency
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Info & Guides

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

Key Features

Product Overview
Key Features
  • Saves energy and resists moisuture with limited lifetime warranty
  • Reduce gaps and eliminate drafts with film faced uniform surface
  • 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 and 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% recycled content.
  • Dimensions: 1/4 in. x 4 ft. x 50 ft.
  • Application: backer board for under new or replacement siding
  • Closed cell lightweight foam board
  • Thermal performance of R1



  • Click here to learn more about Eco Options and Energy Efficiency
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Product Overview

  • Saves energy and resists moisuture with limited lifetime warranty
  • Reduce gaps and eliminate drafts with film faced uniform surface
  • Closed cell XPS foam panel can be layered for more cost savings
Model #: 21UM
Sku #: 409692
Internet #: 100320301

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 and 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% recycled content.

  • Dimensions: 1/4 in. x 4 ft. x 50 ft.
  • Application: backer board for under new or replacement siding
  • Closed cell lightweight foam board
  • Thermal performance of R1



  • Click here to learn more about Eco Options and Energy Efficiency
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Info & Guides

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

Compare Similar

Compare Similar Products
Brand Project Panels Owens Corning Owens Corning Owens Corning
Name FOAMULAR 1 in. x 2 ft. x 2 ft. R-5 Small Projects Rigid Pink Foam Board Insulation Sheathing FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Rigid Foam Board Insulation Sheathing FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Underlayment Rigid Foam Board Insulation Sheathing FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Underlayment Rigid Foam Board Insulation Sheathing
Price
$5.98
$48.41
$48.41
$48.41
Ratings (148) (57) (57) (57)
Sheathing Type XPS XPS XPS XPS
Insulation Location Garage Re-Siding Re-Siding Re-Siding
Product Width (in.) 24 in 48 in 48 in 48 in
Product Length (ft.) 2 ft 50 ft 50 ft 50 ft
Faced or Unfaced Unfaced Unfaced Unfaced Unfaced
Product Thickness (in.) 1 in .25 in .25 in .25 in
View Product View Product View Product View Product

Specifications

Dimensions

Coverage Area (sq. ft.)
200
Product Length (ft.)
50 ft
Product Thickness (in.)
.25 in
Product Width (in.)
48 in

Details

Compatible Install Surface
Concrete,Plywood,Wood
Faced or Unfaced
Unfaced
Insulation Features
Moisture Retardant
Insulation Location
Re-Siding
Insulation R-Value
R1
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Number of Pieces
1
Product Weight (lb.)
13.2lb
Sheathing Size
50 ft. x .25 in. x 48 in.
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Lifetime Limited

Specifications

Dimensions

Coverage Area (sq. ft.)
200
Product Length (ft.)
50 ft
Product Thickness (in.)
.25 in
Product Width (in.)
48 in

Details

Compatible Install Surface
Concrete,Plywood,Wood
Faced or Unfaced
Unfaced
Insulation Features
Moisture Retardant
Insulation Location
Re-Siding
Insulation R-Value
R1
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Number of Pieces
1
Product Weight (lb.)
13.2lb
Sheathing Size
50 ft. x .25 in. x 48 in.
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Lifetime Limited

Questions & Answers

WHAT DO YOU USE TO ATTACH IT TO THE HOUSE...WHAT TYPE OF NAIL?..THANKS PHIL

WHAT DO YOU USE TO ATTACH IT TO THE HOUSE...WHAT TYPE OF NAIL?..THANKS PHIL
Asked by: PHIL
We used a hammer stapler. Put Tyvek special paper under it first. My husband said was super easy.
Answered by: Barbs
Date published: 2018-11-01

Can it be used on the interior side of an unfinished basement to slow the warmer interior air from reaching cold air

Can it be used on the interior side of an unfinished basement to slow the warmer interior air from reaching cold air Behind the insulation? I do not want a vapor barrier as I believe that will trap air and condensation causing mold.
Asked by: Basement
Yes, use the pink side without the writing on it facing out. But I believe there is the same type of insulation in white that would look much nicer.
Answered by: goldenonetoo
Date published: 2019-03-13

Can this be used as underlayment for flooring?

Asked by: Michelle
Hello Michelle, yes Foamular may be used under flooring but Foamular is not structural and will not prevent punctures from furniture legs/feet, so a subfloor such as OSB is required. Thank you for your inquiry!
Answered by: OwensCorning
Date published: 2018-10-25

How many pieces do I actually get for the $40

Asked by: Jay
Jay, I just told you what I estimated you'd get..this comes in a bundle each sheet is 2'wide x 4' L So, if you can figure above 50' total..I'd guess there would be 25 sheets per bundle
Answered by: AuntPaulette
Date published: 2019-05-07
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Customer Reviews

Owens Corning FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Rigid Foam Board Insulation Sheathing is rated 4.6 out of 5 by 57.
Rated 4 out of 5 by from Use this product for floor protection for all our projects.... Use this product for floor protection for all our projects. The only draw back is that over a period of 2-3 days it has a tendency to buckle and would not lie down flat.
Date published: 2019-07-24
Rated 4 out of 5 by from This is very easy to use, easy to cut, and strait from end to end. This is very easy to use, easy to cut, and strait from end to end.
Date published: 2019-10-08
Rated 5 out of 5 by from Product has a uniform consistency worked great Product has a uniform consistency worked great
Date published: 2019-08-08
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-09-25
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-09-18
Rated 4 out of 5 by from 4 Star Review Rating provided by a verified purchaser
Date published: 2019-09-18
Rated 2 out of 5 by from 2 Star Review Rating provided by a verified purchaser
Date published: 2019-08-14
Rated 4 out of 5 by from Worked great... Worked great
Date published: 2019-08-28
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