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

  • Saves energy and resists moisture with limited lifetime warranty
  • Easy install, pre-cut slotted edges to accommodate furring strips
  • Strong, lightweight pink foam panels don't require special tools
  • See More Details

Product Overview

Home with pink outline and Owens Corning logo

A Home is a Fortress

It keeps comfort and safety in - and the other stuff out. Help create the year-round protection every home deserves with proven solutions that work where and when you need them most.

close up of Owens Corning Foamular with water beads

Owens Corning FOAMULAR XPS

FOAMULAR is a rigid insulation board made of extruded polystyrene. XPS for short. Compared to EPS products, FOAMULAR XPS has 25% more insulating power and is 10 times more water resistant.

Cutaway image of a house with Foamular installed in different locations

Choose Above- and Below-Grade Protection

FOAMULAR provides continuous insulating power around the entire home from the foundation to the roofline and all kinds of spaces in between.

man installing fiberglas insulation  over Foamular

Insulating Basement Walls

FOAMULAR is the easy-to-install insulating solution for basement walls. Get added comfort with PINK Fiberglas insulation and finish with drywall board.

man installing Foamular in exterior foundation application

Insulating Foundation Walls

FOAMULAR is ideal for insulating exterior foundation walls. Extremely durable, it can withstand up to 15-25 psi and resists common acid soils and decay.

man installing siding over Foamular

Insulating Under Exterior Siding

FOAMULAR provides a higher R-value per inch than other materials commonly used for exterior wall sheathing.

man installing Foamular fanfold insulation

Also Available in Fanfold

FOAMULAR Fanfold is generally intended for use as a backer board for residing applications and comes in 50-foot sections for a faster install.

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Superior Moisture Resistance

Virtually impervious to moisture. FOAMULAR has up to 10X more resistance to water than EPS insulation.

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Durable, Yet Flexible

A wide range of compressive strengths –up to 100 psi – to handle heavy loads.

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Easy to Cut, Form and Fit

Easy to handle, score, cut and install; no special tools needed.

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Outstanding Insulating Properties

High, stable R-value (5 per inch of product thickness) - more than wood fiber, plywood or 1/2” gypsum board.

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Foamular is certified to meet indoor air quality standards under the stringent GREENGUARD Gold Certification Program.

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Lifetime Guarantee

The only XPS with a limited lifetime warranty that guarantees a minimum 90% of R-value for the life of the product.

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
  • 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.
  • When using FOAMULAR or any low perm insulation, always verify the moisture vapor flow and dew point characteristics of the wall system. Please check your local building codes for vapor retarder/barrier information.
  • 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, acrylic or latex based paints can be used with FOAMULAR products.
  • 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.
  • 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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Coverage Area (sq. ft.)
Product Length (ft.)
8 ft
Product Thickness (in.)
1.5 in
Product Width (in.)
24 in


Compatible Install Surface
Faced or Unfaced
Insulation Features
Formaldehyde Free
Insulation Location
Insulation R-Value
Insulation Type
Foam Board Insulation
Number of Pieces
Pack Size
Product Weight (lb.)
3.18 lb
Sheathing Size
8 ft. x 1.5 in. x 24 in.
Sheathing Type

Warranty / Certifications

Warranty Information
Limited Lifetime

Questions & Answers


Can this be used for the undersidee of a roof in a garage converted for living space?

Asked by Troy June 11, 2019

Dear Troy: Yes, although polyisocyanurate foam board will be more effective in this temperature range. See: DOW Super Tuff-R Model # 99060464, Internet #300528092, Store SKU #1002215973 Also carefully seal all of the joints and edges to block air leaks. DAP 230 or HVAC mastic work well on joints and small gaps. Use the 'Window and Door' version of Great Stuff spray foam for larger gaps. Then install 1/2" drywall over the foam board as your new ceiling surface. (This is also required; foam board is flammable and must be covered with an approved 'thermal shield' in any living space. The standard is 1/2" drywall.) If you live in an area with hot summers and/or cold winters, it would also be a good idea to start by filling the joist bays with rock wool before you install the foam board. Rock wool is much denser than fiberglass and delivers R-4.1 per inch of thickness. Versions are available to match 6" or 8" joists. For example see: Owens Corning Thermafiber Model # UB-40-P5D-15--47--121, Internet #303425926, Store SKU #1002951851. Hold the batts in the joist bays with Simpson insulation wire, which is available for 16" and 24" joist spacing. See: Simpson Model # IS16-R100, Internet #100375163, Store SKU #594333 Then install the foam board. I hope this is helpful. Mark

What kind of adhesive is required to install this on concrete wall? How this can be installed on ...

Asked by HomeDepotUser July 5, 2018

Hello HomeDepotUser, you will want to use an adhesive that is compatible with Extruded Polystyrene. Most brand named construction adhesives have an adhesive that is compatible with Extruded Polystyrene. Foamular products are combustible and needs to be covered by a 15 minute thermal barrier such as drywall.

What is the maximum operating temperature? I want to put this insulation around the outside of a ...

Asked by Abc November 1, 2017

Hi Abc, the maximum operating temperature of our Foamular products is 165 degrees Fahrenheit. Thank you for your inquiry!

How much does it cost

Asked by hi October 30, 2016

Hello, hi! Thank you for your recent inquiry with The Home Depot. As thisInsulation Sheathing is only carried in select Home Depot stores and not online, you will need to contact your local Home Depot Store for stock availability and pricing. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.

Can I glue foamboard to foamboard?

Asked by Joe September 10, 2016

Yes. You can glue layers of Foamular together. Please use a glue compatible with Polystyrene. Thank you!


Asked by MrSandman March 23, 2016

Unfortunately, I am unable to arrange for specific quantities to be available at any given location. Many items in the Owens Corning catalog are only available to order in minimum quantities. I would advise checking with other suppliers and contractors in your area to see if they have the amount you need. If you have any other questions about this, please feel free to call 1-800-GET-PINK to speak with one of our agents. You may also contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and someone will be happy to assist you as well. Thank you for your inquiry!

What type/size masonry screws should be used to fasten this/furring to poured foundation cement walls?

Asked by Rob February 26, 2016

Hi Rob, the install instructions do not list a screw for concrete. The instruction list Owens Corning Joint Seal R foam joint tape. You can also use construction adhesive made compatible with polystyrene or foamed plastics. Check out the link below. http://www.homedepot.com/catalog/pdfImages/28/28d54476-493f-486f-b233-485218b05622.pdf

Where can I find this product?

Asked by rgonz December 27, 2015

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.

Can I use R7.5 in the garage, which is now a bedroom,of a bi-level home

Asked by Jocelyn November 17, 2015

Do you currently have any insulation above the paneling? If code recommends R-13, I'm just wondering how you will achieve that. Foamular is required by code to be covered by a 15 min thermal barrier, such as drywall, as you mentioned, however there may be a more economical and less labor intensive option in which you may receive better thermal results. Depending on what you currently have above the drop ceiling, if anything at all, it may be a better option to just remove the paneling and fill the cavities between the ceiling/floor joists with an Unfaced fiberglass insulation if feasible. Unfortunately it is difficult for me to give you best options without being able to physically see the room. If you are not familiar with this type of situation, I strongly recommend contacting a local contractor who can physically assess your situation in order to advise you on the best option for your scenario. I also suggest you follow local code requirements for your region. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they will be happy to assist you. Or you can call 1-800-HOME-DEPOT (1-800-466-3337) and a someone will be happy to assist you as well. Thank you for your inquiry!

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

Asked by Paul July 17, 2015

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.

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

Customer Reviews

  • 5
    out of 4 reviews
  • 100% recommend this product
Filter by:
Showing 1-4 of 4 reviews
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.
by DAKtimeWeachOtherProjects
8 people found this helpful
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!!
by Butch
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.
by Bpy
4 people found this helpful
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
by ted54e
34 people found this helpful
Showing 1-4 of 4 reviews