Model # 52DD

Internet #202085962

Store SKU #307101

Store SO SKU #192627

Owens Corning FOAMULAR 250 2 in. x 48 in. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing
0748232100326

Owens Corning

FOAMULAR 250 2 in. x 48 in. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing

  • Closed cell rigid foam board, easy to handle, cut and install
  • Compressive strength of 25 psi, R-value of 10
  • Lifetime Limited Warranty for the life of the home
$29.00 /each

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Product Overview

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: 2 in. x 48 in. x 8 ft.
  • Application: exterior foundation walls, under slab, foundations and crawlspaces
  • 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
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

what is the r value of this product?

Asked by: Anonymous
R value is 12.2 for 2 inch thickness
Answered by: HankC
Date published: 2015-09-20

I have a partially finished basement in my townhome. The owner used 2x2 studs, so I can't use reg...

I have a partially finished basement in my townhome. The owner used 2x2 studs, so I can't use regular fiberglass insulation as it would be squeezed too tight. There is a plastic vapor barrier covering the exterior wall, so I don't need anything with an additional vapor barrier. Can this product be used in the wall cavity for insulation behind the drywall and next to the plastic vapor barrier on the exterior concrete wall?
Asked by: Ilovebirds
It could... but it is 2" thick, not 1.5". Check the thickness carefully at home and in store. A 1" thick foam (and add a radiant barrier, metal foil to get every little bit of insulation you can) may make assembly a lot easier. You could also stack a 1" and a 1/2" foam to fill the gap.
Answered by: RenoAndAddonAtOnce
Date published: 2017-02-07

Is this product heat resistant?

I will be applying heat up to 300°F. Will this product withstand this much heat?
Asked by: Anonymous
According to Owens-Corning, this product has a maximum service temperature rating of 165 F, so this would not be recommended. At least one study suggests that polystyrene degradation may begin as low as 200 C (392 F), but given the combustibility of this product, I wouldn't exceed the service temperature unless you know what you're doing--and if that were the case, you probably wouldn't be asking this question here.
Answered by: JeremyR
Date published: 2015-09-20

will work on concrete walls and how do you make it stick

Asked by: Anonymous
The product can be attached directly to concrete using an adhesive intended for foam applications, such as Loctite PL 300.
Answered by: JeremyR
Date published: 2016-10-19
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Customer Reviews

FOAMULAR 250 2 in. x 48 in. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing is rated 4.5 out of 5 by 13.
Rated 1 out of 5 by from Waste of Money This Fomular is the most expensive and difficult to work with product I have ever been fooled into using.. Use $11 styrofoam sheet instead. Ordinary styrofoam is much more flexible, cuts easily with a box cutter or hot knife, and installs much faster. The R value may be less but at least its workable and enables an air seal for far about 1/3 the cost.
Date published: 2017-01-01
Rated 5 out of 5 by from Placed it under concrete slab for insulated floors (with hot water), also in the garage... no mor... Placed it under concrete slab for insulated floors (with hot water), also in the garage... no more cold nights on the floor under the car! Easy to score on the pre-slit lines. Easy to cut with a battery powered circular saw. Some sheets bow a little, flatness is not perfect.
Date published: 2017-02-07
Rated 5 out of 5 by from Product is great (cutting should be outdoors due to dust- or maybe an electric cutting knife) Product is great (cutting should be outdoors due to dust- or maybe an electric cutting knife)
Date published: 2017-01-10
Rated 5 out of 5 by from Used to build a walkin cooler product was easy to... Used to build a walkin cooler product was easy to work with and performed great
Date published: 2017-04-11
Rated 5 out of 5 by from great product. great product.
Date published: 2017-01-03
Rated 5 out of 5 by from Excellent insulation solution for interior and exterior -- with some installation tips We are working on a deep remodel of a home along the shore in Massachusetts. Built as a summer cottage in 1950, most of the walls had no insulation. To bring the home up to current code (required with a major remodel) and save money on heating and cooling, we used Owens Corning Formular to insulate the inside and outside. Here are a few tips: > Inside: All of the walls were open to the studs. Due to the project schedule, spray foam and packed cellulose were not options. So we filled the stud bays with Formular board using the "cut and cobble" method. Large pieces are easy to form by scoring with a knife and breaking the sheet across a sharp edge; small pieces and shapes were cut with a serrated blade. We sealed the gaps and edges with Great Stuff foam. (An important step -- don't skip it!) To nearly fill the 2 x 4 stud bays, we used two layers: 2" and 1". A couple of photos are attached. Verdict: this takes more time than spray foam or packed cellulose, but is a great solution for remodels and do-it-yourself projects. > Exterior: To eliminate the risk of condensation on the sheathing in winter, and boost insulation efficiency, we wrapped the entire house with 2" of Formular 250 board. New house wrap went on first, then the foam board. We used corrosion resistant Spax "washer head" screws to attach the foam board. The joints, gaps and holes were sealed with Great Stuff foam. (As noted above, this is an important step!) 1" x 3" pressure treated firring strips were added last (for the siding and trim) and attached to the sheathing with long corrosion resistant Deckmate screws. A photo is attached. Verdict: Formular foam board is a great exterior insulation and air-barrier solution for remodels and new construction, including walls and roofs. This thickness also blocks water vapor, to prevent rot. Note: Windows and doors in a remodel will be installed against the sheathing, and need to be trimmed out with external "extension jambs" -- to compensate for the thickness of the foam board on the outside. This is easy and almost unnoticeable. We used Azek / Veranda PVC trim board, which never rots and never needs to be painted. (If your trim color is white!) All of the products noted above are available at Home Depot. The result: 2" of foam board outside and 3" inside, all sealed with Great Stuff to prevent air leaks. The layer on the outside also eliminated most of the "thermal bridging" between the framing and the outside air. (Wood is a surprisingly good conductor.) The total R value is roughly 25. We installed all of this during the winter, and immediately noticed a major impact on heating costs -- even though the roof has not been insulated yet! I hope all of this detail is helpful! Mark
Date published: 2014-06-13
Rated 5 out of 5 by from beautiful stuff good product I used the 1 1/2 thickness between studs in basement and directly against the brick basement wall as is used in corningwares more elaborate basement lockin system which was out of my price league.. beautiful stuff.. easy to work with. basement is tight as a drum and warm with raised wood floor as well. I intend to use the stuff as mentioned in youtube video of Cleveland's Dr. energy saver to help upper floors be cooler as well. it's so hot up there, but I think it will be easier to work with and the job will go quickly with awesome results and family will sleep more comfortably.
Date published: 2013-07-01
Rated 4 out of 5 by from Exactly what I needed to insulate a shipping container floor Perfect for insulating a floor. Added plywood on top. Rigid and quiet.
Date published: 2016-08-09
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