0748232100371

Owens Corning

Model 24DD

Internet #100320335

Store SKU #528022

Store SO SKU #192627

FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing

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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: 2 in. x 2 ft. x 8 ft.
  • Application: Exterior Foundation Walls, Underslab, 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

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Customer Questions & Answers

31 Questions51 Answers

Customer Questions & Answers

FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing
FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing

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3 answers

Does product co ez GS at SFntain formaldehyde

This question is from FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing
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June 20, 2016
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Asked by
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June 22, 2016
Answer: 
The Foamular Insulation is formaldehyde free. The product is considered an article as it is a manufactured item and not just a fluid or particle. A 'Safe Use Instruction Sheet' is available at owenscorning.com that presents this information in detail. 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 Read More
The Foamular Insulation is formaldehyde free. The product is considered an article as it is a manufactured item and not just a fluid or particle. A 'Safe Use Instruction Sheet' is available at owenscorning.com that presents this information in detail. 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 someone will be happy to assist you as well. Thank you for your inquiry! Read Less
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Asked by
Massachusetts
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Home Improvement Profile: Professional
June 22, 2016
Answer: 
Dear Art: No, Foamular XPS foam board does not contain formaldehyde. Here is the statement from the Owens Corning website:

Question: Does FOAMULAR® contain formaldehyde?

Answer: Formaldehyde is not an ingredient in the formulation for producing FOAMULAR® products. FOAMULAR® is currently the only extruded polystyrene insulation product that is GREENGUARD® Indoor Air Quality Certified by the
Read More
Dear Art: No, Foamular XPS foam board does not contain formaldehyde. Here is the statement from the Owens Corning website:

Question: Does FOAMULAR® contain formaldehyde?

Answer: Formaldehyde is not an ingredient in the formulation for producing FOAMULAR® products. FOAMULAR® is currently the only extruded polystyrene insulation product that is GREENGUARD® Indoor Air Quality Certified by the GREENGUARD Environmental Institute under the GREENGUARD Standard for Low Emitting Products.

I hope this is helpful.

Mark
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June 21, 2016
Answer: 
No, the insulation does not contain formaldehyde.
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3 answers

IS this product fire retardant

This question is from FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing
Asked by
Timonium, MD
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January 26, 2016
IS this product fire retardant.. Could it be used to insulate a garage ceiling?
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February 5, 2016
Answer: 
No, the insulation is not flame retardant.
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Asked by
Massachusetts
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Home Improvement Profile: Professional
January 31, 2016
Answer: 
Dear Tom: As the Owens Corning rep noted, Foamular foam board is very flammable and must be covered by an approved thermal barrier in a garage. Foamular is very effective insulation, however, with R4 to R5 per inch depending on the temperature.
Another good option for garages is Roxul Rockboard, which provides R4 per inch and is non flammable. It is also available with foil or white poly facing, which Read More
Dear Tom: As the Owens Corning rep noted, Foamular foam board is very flammable and must be covered by an approved thermal barrier in a garage. Foamular is very effective insulation, however, with R4 to R5 per inch depending on the temperature.
Another good option for garages is Roxul Rockboard, which provides R4 per inch and is non flammable. It is also available with foil or white poly facing, which could be the finished surface for your garage ceiling You would need to add multiple layers to achieve ~R12 plus -- just like foam board. You can order Roxul Rockboard 60 from your Home Depot Customer Service or Pro Desk.
With either option, be sure to carefully air seal the joints and edges to block air leaks. The 'Windows and Doors' version of Great Stuff works well. It remains flexible after it cures to prevent cracks as things expand and contract.
I hope this is helpful.
Mark Read Less
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Asked by
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January 27, 2016
Answer: 
Foamular is not fire retardant. This product is considered combustible and would be pose a safety hazard if not installed properly. It must be covered by an approved thermal barrier, usually gypsum or drywall to limit its involvement in a fire should it originate inside a building. If you have any further questions, please feel free to contact a representative at your local Home Depot ProDesk and they Read More
Foamular is not fire retardant. This product is considered combustible and would be pose a safety hazard if not installed properly. It must be covered by an approved thermal barrier, usually gypsum or drywall to limit its involvement in a fire should it originate inside a building. 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! Read Less
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3 answers

Is there an approved list of foam adhesives that won't melt or burn the Foams?

This question is from FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing
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NJ
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November 6, 2014
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Asked by
Massachusetts
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Home Improvement Profile: DIYer
August 8, 2015
Answer: 
We installed foam board in a number of projects, and cans of Great Stuff were perfect to seal the edges and joints. Use the 'Windows' version in any area that may expand and contract, e.g. a roof -- the Windows version remains flexible.
If you want to glue pieces together, any latex based adhesive / sealant will work, e.g. DAP 230 or Loctite PowerGrab: Loctite Model # 1589155 Internet # 203009256 Store Read More
We installed foam board in a number of projects, and cans of Great Stuff were perfect to seal the edges and joints. Use the 'Windows' version in any area that may expand and contract, e.g. a roof -- the Windows version remains flexible.
If you want to glue pieces together, any latex based adhesive / sealant will work, e.g. DAP 230 or Loctite PowerGrab: Loctite Model # 1589155 Internet # 203009256 Store SKU # 281979
I hope this is helpful.
Mark Read Less
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December 2, 2014
Answer: 
Most brand name construction adhesives (DAP, Liquid Nails, Henry, Dow) have a specific type of adhesive that is compatible for use with FOAMULAR® extruded polystyrene insulation. They are labeled regarding their compatibility with polystyrene insulation, so first check the label on the adhesive you intend to use. Petroleum-based products are NOT normally compatible with Foamular. Be sure that the Read More
Most brand name construction adhesives (DAP, Liquid Nails, Henry, Dow) have a specific type of adhesive that is compatible for use with FOAMULAR® extruded polystyrene insulation. They are labeled regarding their compatibility with polystyrene insulation, so first check the label on the adhesive you intend to use. Petroleum-based products are NOT normally compatible with Foamular. Be sure that the adhesive you choose is compatible with all surfaces that you intend to use it on. Thank you for your inquiry. Read Less
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Asked by
Orange,Calfornia
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Home Improvement Profile: Professional
November 8, 2014
Answer: 
Hey Kimeros,
I've used Foamular for years at my store for assorted signage and projects, and I can tell you anything that is urethane or oil-based will cause damage on the board.
With that said, I'd found success is items like Power Grab by Loctite that works well for adhering it together.
Joseph
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2 answers

Would this product be safe to insulate the ceiling of a hot yoga studio that could reach temperatures between 100-105 degrees?

This question is from FOAMULAR 250 2 in. x 2 ft. x 8 ft. Tongue and Groove R-10 Insulation Sheathing
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July 11, 2016
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Asked by
Massachusetts
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July 14, 2016
Answer: 
Dear Yogi: Yes ,the maximum service temperature of Foamular is 165 degrees F according to the Owens Corning SPS data sheet. Foam board is very effective and provides R5 per inch -- with one major caveat: it is also flammable and emits toxic gas when it burns. It MUST be covered by an approved 'thermal barrier' in any occupied space, garage, basement, storage area, etc. The standard is 1/2" drywall. Read More
Dear Yogi: Yes ,the maximum service temperature of Foamular is 165 degrees F according to the Owens Corning SPS data sheet. Foam board is very effective and provides R5 per inch -- with one major caveat: it is also flammable and emits toxic gas when it burns. It MUST be covered by an approved 'thermal barrier' in any occupied space, garage, basement, storage area, etc. The standard is 1/2" drywall.

If flammability is a concern, Roxul ComfortBoard is a good alternative. It is made from rock wool and is fire resistant. ComfortBoard provides R4 per inch, and installs just like foam board. You would need to cover it to improve the appearance, e.g. with a dropped ceiling or drywall. See: Roxul Model # RXCB11224, Home Depot Internet # 206789748 Store SKU # 1001748089

Insulation effectiveness also depends on thickness. You may need to add multiple layers to insulate this ceiling.
Before you start, also seal every potential air leak through the ceiling -- this is almost as important as insulation. Recessed lights are a common culprit. You can cover and seal them with Tenmat covers. See: Tenmat Model # FF130E, Home Depot Internet # 204286308 Store SKU # 1000012747 Seal the edges with DAP 230 sealant. For large gaps, the 'Windows and Doors' version of Great Stuff spray foam is a good solution. (But cannot be used near any source of heat.)

I hope this is helpful.

Mark
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Asked by
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July 13, 2016
Answer: 
The Foamular Insulation has a maximum service temperature of 165 degree Fahrenheit. The warm temperatures in the studio would not be a detriment to the performance of the product. While it is not typically used for insulating a ceilings, it could still work provided the installer fastens the board in place effectively and covers it with a building code approved finish like drywall or gypsum. I suggest Read More
The Foamular Insulation has a maximum service temperature of 165 degree Fahrenheit. The warm temperatures in the studio would not be a detriment to the performance of the product. While it is not typically used for insulating a ceilings, it could still work provided the installer fastens the board in place effectively and covers it with a building code approved finish like drywall or gypsum. I suggest you determine your local code requirements pertaining to the recommended R-value and vapor barrier placement for insulation in 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 someone will be happy to assist you as well. Thank you for your inquiry! Read Less
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Customer Reviews

Rated 4.5 out of 5 by 11 reviewers.
Rated 5.0 out of 5.0 by Easy to install and works great - but not very straight This stuff rocks! Crazy easy to install and works really well. The only downside is they are not 100% true and don’t align tightly together all the time (tight at the top and bottom but gaps in the middle) “JointSealR” tape worked great for this but hard to find “buyinsulationproductstore” had it, pricy! but works great. The temperature in my basement is almost too warm now and it’s below freezing outside :) January 18, 2015
Rated 5.0 out of 5.0 by Easy Installation Ok let me start by saying I am a 45 year female, and my daughter (16) and I did this alone. My basement is extremely cold, and this year the weather in NY was extremely harsh, and my pipes kept freezing even with them being wrapped in foam insulation. My basement is complete, and has heat, but it still remains chilly. When the basement was completed the contractor, made closets for the piping and a room where the oil tank is, but he did not insulate any of the closets for the outer wall . The boards are easy to cut, I used a jig saw, which saved the cutting time tremendously. I used Loctite grab adhesive PL 375 heavy duty construction adhesive to hold the panels on the wall. Since the areas I was attempting to insulate are very small, I had to cut the boards in half (across by the width), to make it easy to maneuver. My daughter placed the adhesive on the back of the boards using a glue gun and I just pushed the boards on the wall. I did not need to use cement screws. The product is easy to install and extremely easy to work with, actually it is a one person job. There is little if any clean up, and no itching from the fiberglass once cut, and for those reasons, I gave it 5 stars As for the insulation, I am not sure how good it will work, but I still kept my rating. I also plan on purchasing the door draft guards to place on the bottom of the door, and I am hoping that will make the basement much more cozier than it is now. If I am able to update this review in the winter, I will say whether the chase closets seems to be a little warmer. July 1, 2014
Rated 5.0 out of 5.0 by Great with insulation We laid the foam beneath the wood under which we blew in insulation. Works great. Easy to use. March 3, 2013
Rated 1.0 out of 5.0 by Tongue and grove - very poor quality I purchased this insulation after using a 2"x2'x8' Dow tongue and grove insulation for 1/2 of my foundation. I needed additional insulation but the company I purchased the Dow insulation from was closed on Sunday. I needed to get the project done so I was happy Home Depot carried the same size insulation but quickly realized that the tongue and groove of the Owens Corning insulation were extremely difficult to joint together compared to the much large tongue and groove of the Dow product. It took me twice as long the put up the Owens Corning insulation because I spent a lot of time trying to get the boards to join...the tongue and groove were terrible and many of the panels just wouldn't align no matter how hard and how carefully I tried. So much for an R value of 10 when I couldnt get the panels to completely join together. I would not purchase this product again. Go with the Dow product that has a much bigger and better tongue and grove. (And it was the same price). July 12, 2015
Rated 5.0 out of 5.0 by Owens-Corning 2-inch rigid insulation. Great stuff I have used this product for insulating basement walls, crawlspace walls, and other related projects. The two-inch thick product has R.10 and I have doubled up to 4 inches in certain spots to get R.20 total. This product is ideal for places where you do not stud out the area such as workshops, crawlspaces, etc. Also, this is available in the 2 foot by 4 foot size! So, there is no need to cut the panels down from a four-foot width panel to get through problem accessways such as those for crawl spaces. Lastly, I eagerly recommend this product to bring attic access panel R-values up. Just cut to fit your access plywood panel and glue the insulation to it. A dream product that works, is easily cut and worked, and does the job!! A perfect score from me. January 10, 2010
Rated 5.0 out of 5.0 by Effective Insulation I purchased sheets of this in R10 and installed double thicknesses on the wall inside the unheated garage attic to provide insulation for my master bedroom wall. The comfort level in this room was immediatly improved. Drafts and the feeling of cold damp air from our Colorado winter immediately subsided. This product coupled with blown in celulose insulation provided the most pleasant winter I've had in many years. Also--at age 50 this year, I did it myself without any help from my hubby! Home Depot is my craft store! May 29, 2010
Rated 5.0 out of 5.0 by excellent insulator We used this insulation board around our ac window unit. Fits nicely and cuts easily. Makes a big difference keeping the heat and humidity outside. July 8, 2014
Rated 4.0 out of 5.0 by R 10 value I installed 18 of these boards over the weekend in my crawl space because each winter the bedrooms above , are much colder then the rest of the house by as much as 5 degrees . I hope this winter the insulation helps . I also sealed the outdoor vents and installed a dehumidifier . I installed the 2in x 8' x 2' boards with 9 cans of great stuff foam spray September 16, 2013
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