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Internet #100320293

Store SKU #212711

Store SO SKU #192627

Owens Corning FOAMULAR 1-1/2 in. x 2 ft. x 8 ft. R-7.5 InsulPink Furring Lap Insulation Sheathing
0748232100340

Owens Corning

FOAMULAR 1-1/2 in. x 2 ft. x 8 ft. R-7.5 InsulPink Furring Lap Insulation Sheathing

  • Pre-cut slotted edges to accommodate furring strips
  • Compressive strength of 15 psi, R-value of 7.5
  • Lifetime Limited Warranty for the life of the home

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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 & 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: 1-1/2 in. x 2 ft. x 8 ft.
  • Application: Interior Basement Walls
  • Closed cell rigid foam board, easy to handle, cut and install
  • 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

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Customer Questions & Answers

Where can I find this product?

My husband has been looking everywhere for this product. The website says it is "In Store Only" but it is not available within 100 miles from any zip code I enter - and I have entered codes out of state. Please let me know how this can be ordered for our basement project, or if another similar product has replaced this. Thank you in advance.
Asked by: rgonz
i contacted the representative at my local home depot pro desk. They did not have a clue as to what i was asking for. They finally had to call owens corning directly. i need 10 sheets for one wall in my basement. owens corning will only ship a quantity of 128 sheets or more. What good is it having a user friendly product if you cannot buy it.
Answered by: homeowner
Date published: 2016-12-20

Why has the dimension of the grove/shiplap on the foam board changed and how can it be strapped?

I've checked both Home Depot and lowes and found the same thing. That is, the depth of the grove / shiplap on the 1.5 inch foam board is greater than 3/4 inches in depth. This precludes the use of 1x3 strapping since the result is that the foam board now protrudes beyond the strapping and that make it difficult to apply the wall board. The salesman at Home Depot suggested using 5/4 lumber to fill the gap between the sheets of foam board. That works, although leaving about 1/4 inch of the wood above the surface of the foam board, but it's way more expensive than using strapping. What's going on?
Asked by: Paul
I noticed that as well. Actually, what I've noticed is that each foam board is different. No 2 seem to be alike except for that, as you point out, none of them work with a piece of 1x3. If your covering it with plywood (like in a basement workshop) you will be fine, but if your installing drywall over it, you may need to do some creative and extensive shimming. My local lumber yard sells something they cal "Super Boards" All it is, is a piece of 1x that is only dressed on 3 sides, with one side still rough. This results in a board that measures 7/8". That extra 1/8" might be just enough. The down side is they only come in 1x6 or wider, so you will have to rip them.
Answered by: kndu
Date published: 2016-12-22

Basement walls with a beveled bottom portion of the wall

In my basement, the bottom four inches or so are sloped inward, probably due to some masonry designed to prevent water entry at the wall seam. In addition, there is additional masonry (1/4 inch or less) on the bottom four feet of the wall, probably for the same reason. the result is a wall that is not flush from top to bottom. Would this product be able to be attached directly to the basement wall or would you suggest framing the walls and using another product as a moisture barrier/insulator? If so, what product would you suggest? Thank You!
Asked by: Scott
Dear Scott: Yep, sloped walls create a number of problems. A couple of suggestions: (1) Poly moisture barrier: Start with a thick poly moisture barrier, laid against the concrete wall and carefully sealed at the top, sides and seams with DAP 230 -- to block air and moisture leaks. (2) Foam board: Mount 1" foam board on the concrete wall, down to the level where the wall begins to slope inward. Seal all of the edges and joints carefully with DAP 230. Then add a second 1" layer of Foamular, which will probably reach down to the floor. If a gap remains, fill it with the 'Windows and Doors' version of Great Stuff, which remains flexible. (3) Build your 2x wood wall in front of the foam board, so that the studs do not touch the concrete. To boost insulation, fill the stud bays with Roxul rock wool, which provides R 4.2 per inch. (4) Also cover your floor with a poly vapor barrier and at least 1" of foam board -- and seal all of the joints and edges carefully with DAP 230 and Great Stuff. Lay 3/4" plywood on top as the nailing / glue surface for your flooring, with the panels perpendicular to the foam board seams. Seal the plywood carefully with DAP 230. (5) If there is any hint of a water problem in your basement however, start with DriCore panels -- and make sure there is a drain / sump pump to remove water leakage. Then install the foam board and plywood, if you have sufficient head room. (6) (4) Also read up on fire blocking, which is required at the top of basement walls, stairs, etc. Do a Google search for "How to firestop your basement" from Contractor Kurt. Roxul rock wool is a good solution (also available at Home Depot). You can stuff it into the gap at the top of the wall and into the end of floor joist bays. Rock wool is much denser than fiberglass, molds kind of like clay, and stays where you put it. I hope this is helpful, Mark
Answered by: BvilleBound
Date published: 2015-10-08

Could this be used on exterior of block walls with plywood and siding over it?

Asked by: Kevin
Dear Kevin: Yes. Foamular foam board is XPS -- which is water resistant, unlike polyiso foam board which absorbs water. So Foamular is ideal for external applications, e.g. walls and roofs. On the Foamular website you can find related application notes. (It is puzzling that the Owens Corning rep said it is designed for interior applications only, contrary to their website.) A few tips: (1) You don't need to sheath the wall with plywood over the Foamular. We recently did a deep remodel of a house in Massachusetts, for example, and wrapped the exterior with 2" Foamular panels. On top, we attached 1" x 3" strapping to mount the siding. A photo is attached. This is much cheaper and easier, and provides an generous air gap behind the siding that will allow it to dry. (2) Use a Ramset (available at Home Depot) to shoot nails through the 1x3 strapping into the concrete block. (Be sure to wear ear and eye protection!) This will also fasten the Foamular panels securely to the block wall. (3) Carefully seal the top and bottom of each panel to the block wall, to stop hot / cold air from circulating behind it and negating the value of your new insulation. Great Stuff foam and DAP 230 work well, depending on the size of the gap. Look for the 'Windows and Doors' version of Great Stuff in the blue can, which remains flexible as things expand and contract. (4) Depending on your climate, energy costs and the insulation on the inner side of the block wall, you may want to double-up with 4" of Foamular for R20 -- the current standard for walls. I hope this is helpful. Mark
Answered by: BvilleBound
Date published: 2015-09-20
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Customer Reviews

FOAMULAR 1-1/2 in. x 2 ft. x 8 ft. R-7.5 InsulPink Furring Lap Insulation Sheathing is rated 5.0 out of 5 by 4.
Rated 5 out of 5 by from Owens Corning Insul Pink Foamular I liked working with this product. It was easy to cut, there was no irritating dust and it fit easily in the bays between joists. The leftover waste was easily disposed of. The performance of the insulation achieved immediate results in moisture reduction and heat savings. I used it to insulate the space between the basement ceiling and the living space above in an older home with a very damp basement.l
Date published: 2009-09-30
Rated 5 out of 5 by from Easy to install, great product for money, no mess with traditional insulation Light weight, easy to cut, no mess as with traditional insulation nor small fibers to irritate skin. Using in basement to insulate outside walls in new kitchen build. Saw immediate difference in temperature of basement. We are doing all the work ourselves.
Date published: 2014-07-10
Rated 5 out of 5 by from Easy to work with and solid This stuff is very rigid (as the name would imply). I was stepping all over it and barely left a mark — good compressive strength. I used it between sleepers over cement and the difference was immediately noticeable. It was incredible easy to cut. I used a razor and circular saw, both with good results. A little pricey, but money well spent.
Date published: 2014-07-21
Rated 5 out of 5 by from Hunting Cabin built a hunting cabin and instead of closing the 8 foot ceiling I left it open like a cathedral ceiling and placed this insulation between the ceiling rafters, they were 2 feet apart and this worked out great, room looks much bigger, but it is still insulated. Bring on the snow!!
Date published: 2016-08-16
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