Model # 21UM

Internet #100320301

Store SKU #409692

Owens Corning FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Rigid Foam Board Insulation Sheathing
0748232100050

Owens Corning

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
$ 47 38
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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



  • 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



  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Info & Guides

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Specifications

Dimensions

Product Length (ft.)
50 ft
Product Thickness (in.)
.25 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Unfaced
Insulation Location
Re-Siding
Insulation R-Value
R1
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Product Weight (lb.)
13.2lb
Sheathing Type
XPS

Warranty / Certifications

Warranty Information
Lifetime Limited

Specifications

Dimensions

Product Length (ft.)
50 ft
Product Thickness (in.)
.25 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Unfaced
Insulation Location
Re-Siding
Insulation R-Value
R1
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Product Weight (lb.)
13.2lb
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: 2018-02-14
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Customer Reviews

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 42.
Rated 3 out of 5 by from The product itself is fine. The price I believe is very high at almost $50 per each. Also, the na... The product itself is fine. The price I believe is very high at almost $50 per each. Also, the nature of the product doesn’t lend itself to being very durable so there was damage to it because of handling it until it finally makes it to the store shelf. But it serves the purpose well for what I’m intending to use it for, which is as an underlayment between a concrete floor and a OSB subfloor.
Date published: 2019-02-19
Rated 5 out of 5 by from went on very easy and im sure it willmake a difference in heating and cooling and add more of a s... went on very easy and im sure it willmake a difference in heating and cooling and add more of a sound barrier
Date published: 2019-02-12
Rated 5 out of 5 by from The Foamular Fanfold did what I wanted it to do.... The Foamular Fanfold did what I wanted it to do.
Date published: 2019-02-26
Rated 3 out of 5 by from 3 Star Review Rating provided by a verified purchaser
Date published: 2019-02-06
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-02-05
Rated 3 out of 5 by from 3 Star Review Rating provided by a verified purchaser
Date published: 2019-02-05
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-02-06
Rated 4 out of 5 by from Worked great; like it always does!... Worked great; like it always does!
Date published: 2019-01-22
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