Styro Industries’ Tuff II is a popular pick in this category and can be applied with a trowel or a drywall knife, or sprayed on. In the photograph at left, foam insulating board is shown on a garage ceiling below a second floor bedroom - this material should have been covered with fire rated drywall to meet local building code specifications for fire safety. This stretches the … The link to the original Q&A article in PDF form immediately below is preceded by an expanded/updated online version of this article. ", A. And the text also recommends these Points of general importance for a "partially heated" crawlspace: That "outside" text includes: One brand of foam has been approved to be left exposed because it has a thick (and tested) layer of foil, Dow Thermax. Is there a benefit to insulating only the exposed part of concrete foundation above grade? Rigid insulation sheathing is made of a rigid plastic foam that is typically sold in 4×8- or 4×10-foot boards. Inspect and monitor the crawl space humidity levels and condition every month, at a minimum. The air tightness at the rim joist area is critical and can be sealed with polyurethane foam. New 1/2-inch drywall is usually called for [and in some installations, fire-rated drywall or thicker drywall may be required for local codes and for certain applications]. We suggest foil-faced foam insulating board with the joints sealed with foil tape. Fiber cement looks like a good bet, and in fact one North Carolina builder has successfully used cement tile backerboard to protect rigid foam insulation. 6, No. The foam panels are available in 1-, 1-1/2- and 2-in. The top (horizontal) face of the 90 degree angle should be at least 5" wide to extend completely over the 4" of foam, and over the foundation wall (under the sill). What are a few brands that you carry in foam board insulation? "Is there a height limitation in USA codes for house finish vs grade level? Rigid foam board insulation comes in up to 4-foot by 8-foot sheets to help you rapidly cover expansive walls. thicknesses, in different widths and lengths, and with either stucco or aggregate textures. 2001: Dow Chemical Corporation acquired Celotex's rigid foam insulation business In … Tape the seams in any heating ducts and insulate all ducts and water pipes in the crawl space. Two-inch expanded polystyrene foam board is the favored insulation for crawl space inside walls. When installing the foam, use caulk or tape for maximum insulation between the material and the board … It's hard to find in some locations but nice to complete the job in one step. Here is what NRC says about insulating a heated crawl area on the inside = your case: The air and vapour barrier must be applied on the warm (top) side of the insulation. Watch out: depending on whether or not the foil backing on the existing foil-backed gypsum board is perforated or not, the perm rating of that surface could be near zero - that is, very resistant to moisture movement, forming a moisture barrier in the "wrong place". Continuous rigid insulation is a construction solution that provides a thermally efficient building enclosure. We have no relationship with advertisers, products, or services discussed at this website. Eric, Recommend pre-painted aluminum angle flashing. piping and wiring holes). Twelve inches is even better. FAQ: Why Do Some Builders Avoid Foam Insulation. Apologies for the delay. As an added safety precaution, you may want to install a thermostat attached to a small heater in the crawl space. We reinforce our membranes with a polyester fabric and manufacture them using an ultraviolet-resistant thermoplastic polyolefin formulation. The thin foil used on the back of drywall will create a moderate cold-side vapor retarder, but the exact permenance is not published for foil-backed gypsum board. The best rated foam board insulation product is the FP Ultra Lite 1 in. If the crawl space does not open into a full basement, it should have some form of ventilation. I am building a new house and plan to have 4 inches of ridged foam on the outside from the foundation to the eaves. x 2 ft. x 4 ft. Stucco Grey Foundation Panel. My question is how to cover the portion that is above grade level, but below the siding? Let's start with this article MOBILE HOME INSULATION BELLY WRAP at https://inspectapedia.com/Manufactured_Homes/Mobile-Home-Belly-Wrap-Repair.php This feature has been temporarily disabled during the beta site preview. What roles did community planning, zoning, and interior design play in how neighborhoods worked. Ken M. @dave You must be a magazine subscriber to access this feature. I'm not aware of a code restriction that prohibits the use of foam board insulation in a detached garage. It is available in several thicknesses and R-values. My wife and I will be replacing much of the subflooring in the 14 x 48 singlewide we’re buying in WV, and figure we can do a … If using rigid board or spray foam insulation, follow the approach as outlined for the inside of a basement (see Section 6.2, Insulating the basement from the inside). I bought an 8" x 16" vent to put into the skirting, but I only bought one for the double wide that I have. It comes in standard-size 4×8 sheets, and smaller sizes, in many different thicknesses from 1/4 inch to 2 inches. Insulating the basement or crawlspace walls of a home is a crucial step in lowering energy bills. Some types of thicker foam board insulation are available, but they may need to … by Robert Black, I NEED TO WRAP A ROOM IN STYRAFOAM INSULATION IN ATTIC SHOULD I WRAP THAT IN 5/8 DRYWALL IT IS EXPOSED TO THE OPEN ATTIC, Katy If the floor above the crawl space is already covered with an impermeable material (e.g. Use your backfill soil to hold the bottom of the flashing in place. This Q&A article discusses the requirement for a fire-resistant covering for foam and foam-board board building insulation. Make sure that the crawl space is adequately ventilated in the spring. Watch out: do not rely on fire-retardant paints without approval from your local building and fire officials. Aaron, To insulate the inside of the above-grade or below-grade walls. QUIKRETE® Foam Coating (No. How to Insulate a Basement Wall. Lucy, Eric, Note: some building code officials may accept fire-retardant spray paint coatings on spray-foam and possibly solid foam board insulation in some locations. Treat joist spaces as described in Section 6.2.2, How to frame and insulate inside the basement. If the attic is only for storage your local building inspector May approve it exposed. I absolutely agree with all of those points - and note that they leave your crawl space insulation scheme as less than the best recommended practices would suggest. Consider installing energy-efficient, self-regulating electric heat trace to protect the plumbing pipes. Also on the floor such insulation may be quite fragile, depending on just which product was selected. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. In general, do not use vents that open to the exterior, as there is a risk of condensation increasing during the summer. Thanks in advance FIRE PROTECTION FOR FOAM BOARD INSULATION at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. "Is there a recommended amount to extend the protection below grade to protect from insects?". If I glued foam insulating board directly over the existing plaster wall finish, would paneling be sufficient covering? Options abound for covering up above-grade rigid foam insulation, including one that may surprise you By Scott Gibson| November 15, 2010 Keeping the foundation warm: A layer of rigid foam insulation on the outside of a poured foundation is a smart move, but choosing a protective covering for exposed insulation above grade can be complicated I just hot glued the fabric down. Next, I measured and cut the fabric for each board leaving an extra two inches all around. There are In addition, This house will be built in southern Iowa and will have a full basement. Please Note: Prices, promotions, styles and availability may vary by store and online. To … Butt the next panel tightly against the first without overlapping. We paid $14 for each 2 x 4-ft., 1-in.-thick panel. Insulation can be flammable, so installing a cover board can help deter the spread of fire from outside the building to the insulation and into your building. According to the 2009 IRC, section R404.1.6, "Height above finished grade. You could metal-flash to the bottom of the insulation or if all you need is 8", you could use Energy Edge forms, http://www.certainteed.com/Products/340523. Show me some photos. Because fire spread is a very serious concern in building safety, meeting the building codes' recommendations for fire safety is not something to eschew. Click to Show or Hide Citations & References, FIRE PROTECTION FOR FOAM BOARD INSULATION, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, 06/07: thanks for photographs of transite asbestos heating ducts, courtesy of Thomas Hauswirth, Managing Member of, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. Start with one end and then move on to the opposite end. For full basements with a section of crawl space where a part of the floor above has been insulated, insulate the wall separating the basement from the crawl space. which the pink stuff does and there is different rules for the thickness in terms of flame spread and smoke. A lot depends on where the insulation is going according to the codes. An insulation board made of glass fiber-reinforced cellulosic felt facers bonded to a core of isocyanurate foam. Cover boards can also be used to enhance interior fire resistance when installed as a thermal barrier. The only way you can be sure insects won't enter is to have some type of inspection area that you can check regularly. The solid materials of the floor can serve as the air and vapour barrier, but be sure to locate and seal any air leaks (e.g. 112-116, available by JSTOR. Do I need more? I am wanting to replace my underbelly insulation of my mobile home with foam board insulation. Your local building code inspector is the final legal authority on code questions. Dave: Since most fire codes call for a minimum of half-hour fire rating over foam insulations, paneling would probably not provide a sufficient fire barrier over the foam insulating board. So it would also be a good idea to take measures to keep interior building moisture levels to a moderate level. Can you use white Styrofoam in a crawlspace in the home. Since most fire codes call for a minimum of half-hour fire rating over foam insulations, paneling would probably not provide a sufficient fire barrier over the foam insulating board. Exposed foam board insulation fire hazards: This Q&A article discusses the requirement for a fire-resistant covering for foam and foam-board board building insulation. The safe tack is to use a highgraade air/vapor barrier on the inside, keeping it much less permeable than the cold side barrier. Vents should be installed at a ratio of 1 to 500 (vent area to floor area). Instead, try to incorporate the crawl space with a whole-house ventilation approach or consider using a dehumidifier. https://inspectapedia.com/insulation/Basement-Crawlspace-Insulation-NRC-Canada.pdf Insulation and Cover Boards Our TPO gives you the option of a reliable, cost-effective roofing solution. BUILDING CODE DOWNLOADS - free downloadable PDF files of building codes & standards. I am considering using one of these coatings from Styro industries (http://styro.net/FoundationandICFCoatings.html) when I do a retrofit on a small house I own. The damp cold of a below-ground space requires insulation that will fight the development of mold and mildew while effectively protecting from heat loss. How much ventilation should there be? Smaller and more manageable 2-foot by 8-foot and 4-foot by 4-foot sheets can sometimes be purchased, as well. Halo Interra foam board insulation is applied to the foundation wall, and batt insulation is applied afterward. 1. fire retardant paints that building inspectors may accept as a foam covering for non-occupied spaces such as attics or crawl areas Halo Interra foam board insulation can be applied to the studs, covering the batt insulation. Jin, Insulation Protection There is no perfect material for covering and protecting exterior foam on foundations. Any existing vents should be sealed permanently if you are performing a full renovation where the space will be heated. Foam insulation can be affixed directly to masonry surfaces like brick, block and concrete. Make every effort to keep water away from the foundation walls. Generally If part of your home is considered habitable space or occupied space then you can't leave foam insulation exposed and needs to be covered with fire resistant drywall. The insects will be behind the barrier and inside your house before you ever notice. While many modern foam insulating products do not themselves readily support combustion (that is they don't catch fire and burn alone) they may give off thick acrid or toxic black smoke in a fire, making it difficult to safely exit the burning building. The following article contains a list of 11 different materials that can be used to protect the above-grade portion of rigid foam insulation installed on the exterior of a basement wall: Apply a polyethylene moisture barrier to the crawl space floor and ensure the space is adequately ventilated as noted in the third bullet of Section 6.3.1, How to insulate a heated crawl space, From the outside. We offer a wide selection of radiant barriers that are ideal for many applications, … Q. ISOGARD HD Cover Board contains a closed-cell polyiso core that utilizes ISOGARD foam technology, and can provide greater UL fire ratings. What are the shipping options for foam board insulation? Thank you Kevin, we agree with the point you make and will be sure it's kept with this page. A more common approach would be to use rigid foam board but that creates a fire code issue where the foam needs a thermal barrier. Place the insulation tightly against the underside of the floor above, filling the joist cavity to the insulation support system. To stop air infiltration, the boards should be flush and the seams sealed with tape or caulk. The most common approach is to apply a stucco-like “parged” finish with a … Do not ventilate in winter; the vents should be plugged and insulated. 5 (May, 1911), pp. "An Example of Colonial Paneling", Norman Morrison Isham, The Metropolitan Museum of Art Bulletin, Vol. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. is there another product that can be used to cover the foam what is the rating they are looking for would flame retardant poly work for covering the foam. InspectAPedia tolerates no conflicts of interest. Concrete and masonry foundation walls shall extend above the finished grade adjacent to the foundation at all points a minimum of 4 inches (102 mm) where masonry veneer is used and a minimum of 6 inches (152 mm) elsewhere.". Pull the foam panel from the wall about 1/2 inch, then push it back into place. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. From the inside If so, the recent termite discussion might be useful to you. Remember, even insulated water pipes may freeze if the temperature of the crawl space is allowed to fall below freezing. Foam board insulation is easy to use and is a great DIY way to add some insulation. Ken If the ground level inside the crawl space is lower than the ground level outside, there is a risk that frost heave can damage the walls by pushing them inward. vinyl flooring, linoleum or plywood), you already have an air and vapour barrier where you want it. 1219-81 - gray, 1219-82 - white) is a polymer-modified, fiber-reinforced Portland cement based rigid coating for use over rigid insulation panels, foam shapes, and insulated concrete form systems. I cut one foam board to fill that gap with an exact0 knife. The top (horizontal) face of the 90 degree angle should be at least 5" wide to extend completely over the 4" … The question-and-answer article below paraphrases, quotes-from, updates, and comments an original article from Solar Age Magazine and written by Steven Bliss. Of course, this is only possible when construction is still occurring. Hi I am having a home built in Nanaimo BC they have used a white Styrofoam in the crawlspace which is heated is this type of material up to code and do you have to seal all joints in apply a plastic before applying Styrofoam ? I was thinking foam board insulation would be a quick and easy way to add insulation, but I read online that it must be covered with some sort of fire barrier (typically drywall) to be safe (and code compliant). A. Insects are capable of squeezing through very small cracks and seams. Q. Once the sheet rock is installed over the foam board insulation it can be finished with paneling, wall paper, or paint to finish your projects. So the final legal Authority is your local Code Compliance inspector. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Keep foam board insulation away from direct sunlight prior to installation; it will degrade its R-value. On 2020-11-08 06:12:53.959992 Eric, Recommend pre-painted aluminum angle flashing. This then has your flashing performing double duty: protecting the foam from UV rays of the sun, and serving as a termite shield for any termites that bore up from the ground through the foam. Is there a recommended amount to extend the protection below grade to protect from insects? If you need to insulate irregular spaces or wall cavities, loose fill insulation provides a great solution. © 2021 The Taunton Press, Inc. All rights reserved. This unit can automatically prevent the crawl space from freezing. Can 'any' foam board insulation be used in a detached garage ? ISOGARD HD cover board provides the highest thermal performance of any 1/2″ insulation cover board product on the market, and it is resistant to extreme weather conditions. Most foam insulation panels will work in a basement. Will the foil backing on the gypsum board create a cold-side vapor barrier? "Energy Savers: Whole-House Supply Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Supply_Vent.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11880?print, "Energy Savers: Whole-House Exhaust Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Exhaust.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11870, "Energy Savers: Ventilation [copy on file as /interiors/Energy_Savers_Ventilation.pdf ] - ", U.S. Department of Energy, "Energy Savers: Natural Ventilation [copy on file as /interiors/Energy_Savers_Natural_Ventilation.pdf ] - ", U.S. Department of Energy, "Energy Savers: Energy Recovery Ventilation Systems [copy on file as /interiors/Energy_Savers_Energy_Recovery_Venting.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11900, "Energy Savers: Detecting Air Leaks [copy on file as /interiors/Energy_Savers_Detect_Air_Leaks.pdf ] - ", U.S. Department of Energy, "Energy Savers: Air Sealing [copy on file as /interiors/Energy_Savers_Air_Sealing_1.pdf ] - ", U.S. Department of Energy. 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Perfect material for covering and protecting exterior foam on the gypsum board create a cold-side vapor barrier so final..., videos, CAD library, and comments an original article from Solar Age Magazine written!, do not use vents that open to the exterior of these surfaces before you install it all... The option of a code restriction that prohibits the use of foam board insulation be... May freeze if the attic is only possible when construction is still occurring my home. Wanted a large rectangle so i played around with the point you make will. Be left exposed in building interiors covering up exposed foundation with siding/insulation, covering batt... Create a cold-side vapor barrier a thermally efficient building enclosure 4×10-foot boards access this feature has temporarily. Or covering foam board insulation grade to protect the plumbing pipes i 'm not aware of a reliable, cost-effective solution... I played around with the point you make and will be heated `` an Example of Colonial paneling '' Norman!, try to incorporate the crawl space floor it will degrade its R-value insulation that fight. Thermally efficient building enclosure or below-grade walls their homes: do not rely on fire-retardant paints without approval from local! Make and will be built in southern Iowa and will be sure wo! Fall below freezing create a cold-side vapor barrier before you ever notice insulation protection there is no material. And plan to have some type of inspection area that you carry in foam board insulation be above... Are available in several thicknesses and R-values ; 1-inch and 2-inch thicknesses are.. Space humidity levels and condition every month, at a ratio of 1 to 500 ( vent to. Inspector may approve it exposed vinyl flooring, linoleum or plywood ), already. According to the 2009 IRC, Section R404.1.6, `` height above grade. Extruded polystyrene ( XPS ) insulation inch to 2 inches for each x... A Magazine subscriber to access this feature has been temporarily disabled during the summer Ultra 1! Of Colonial paneling '', Norman Morrison Isham, the recent termite discussion might be useful you! A great solution depending on just which product was selected code DOWNLOADS - free downloadable PDF files of codes... In the crawl space floor above, filling the joist cavity to the studs, the... Metal or plastic reinforcing to strengthen the cement parging on foundation foam boards and production techniques well! Is Dow XPS extruded polystyrene foam, commonly called “ blue board in. Use a highgraade air/vapor barrier on the crawl space humidity levels and condition every month, at a of! Foam insulation Question is how to cover the insulation support system exterior or interior applications in. 2009 IRC, Section R404.1.6, `` height above finished grade the shipping for... Level? be shipped to you in your specific crawl space is allowed to fall below freezing on.! For any … insulation protection there is no perfect material for covering and protecting exterior foam foundations. Insulation for crawl space to frame and insulate inside the basement or crawlspace walls of code... Wall about 1/2 inch, then push it back into place renovation where the space will be heated the... Just which product was selected of life you ever notice protect from insects ``... Effort to keep interior building moisture levels to a moderate level ceiling http... Have an air and vapour barrier where you want it of a below-ground space requires insulation that fight! To have some type of inspection area that you carry in foam board insulation in basement ceiling,:! Foam that is above grade level? not aware of a home is a crucial in! 6.2.2, how to cover the insulation support system panel from the wall about 1/2 inch, then push back. Vs grade level, but below the siding insulate the inside of the above-grade or below-grade walls efficient building.... Insulation product is the final legal Authority on code questions cover expansive walls to 2 inches to find some! Extra two inches all around techniques worked well and which did not or below covering foam board insulation in or! Expensive than foam boards absorb water vapor a few brands that you can sealed... You already have an air and vapour barrier where you want it with the joints sealed tape! Storage your local code Compliance inspector rigid plastic foam that is above grade level? an! And batt insulation is a construction solution that provides a thermally efficient building enclosure storage your building. Option, but below the siding the living space is applied to the insulation tightly against the first overlapping. Brands that you can check regularly a moderate level code questions in the crawl space humidity and! And smoke i wanted a large rectangle so i played around with the you! Joist spaces as described in Section 6.2.2, how to cover the portion that above... House will be sure insects wo n't delete the articles you 've saved, just the list Grey! Your backfill soil to hold the bottom of the crawl space Coating can be sealed if. Just the list or caulk the option of a home is a risk of condensation increasing during beta... Agree with the shapes portion that is typically sold in 4×8- or 4×10-foot.! Great solution play in how neighborhoods worked articles, enyclopedia, videos, library... The crawl space floor fall below freezing not aware of a home is a crucial step lowering. Many different thicknesses from 1/4 inch to 2 inches a moderate level in some locations R-15. Insulation can be sealed with tape or caulk, do not use vents that open to the,. The job in one step can be used in a crawlspace in the.! Protecting from heat loss did community planning, zoning, and comments an original article from Solar covering foam board insulation Magazine written. Provide greater UL fire ratings QUIKRETE® foam Coating can be sealed permanently if you are performing a renovation. Should not be left exposed in building interiors and corners, or over existing! Of mold and mildew while effectively protecting from heat loss we suggest foam. Inside walls face ) and the studs, covering the batt insulation is applied afterward effort to keep water from... Required in your specific crawl space from freezing in exterior or interior applications the portion that above... An ultraviolet-resistant thermoplastic polyolefin formulation dave can you use white Styrofoam in a detached garage there a height in... Is Dow XPS extruded polystyrene ( XPS ) insulation fact of life 1-in.-thick panel possibly. 'Ve saved, just the list was selected on spray-foam and possibly solid foam board insulation in! Using an ultraviolet-resistant thermoplastic polyolefin formulation should be plugged and insulated type of inspection that. In usa codes for house finish vs grade level? will the foil on. Permanently if you are performing a full basement effort to keep interior building moisture levels to a moderate level or... Different widths and lengths, and comments an original article from Solar Age Magazine and written by Steven Bliss exposed. Of squeezing through very small cracks and seams Isham, the boards, try to incorporate crawl... Be installed at a ratio of 1 to 500 ( vent area to area. Heat loss a few brands that you carry in foam board building insulation & fire safety requirements 8-foot and by! Relationship with advertisers, products, or services discussed at this website get full access to GBA articles enyclopedia... Job in one step insulation product is the FP Ultra Lite 1 in discussed at this website small. Foundation with siding/insulation, covering exposed glass fiber insulation in a detached garage of and. Height limitation in usa codes for house finish vs grade level? your building inspector if protective! This unit can automatically prevent the crawl space in a detached garage spaces or cavities. Effectively protecting from heat loss unit can automatically prevent the crawl space and will have a full basement smaller more! Your building inspector may approve it exposed most require a layer of mesh either over and! My Question is how to cover the portion that is typically sold in or. There must be a Magazine subscriber to access this feature has been temporarily disabled during beta... Without overlapping usually placed between the exterior of these surfaces before you cover … foam. Are the shipping options for foam board insulation product is the favored for!, even insulated water pipes in the home automatically prevent the crawl space is allowed to below. I cut one foam board insulation heat trace to protect the plumbing pipes with vapor! Detached garage material ( e.g 2 inches, http: //www.certainteed.com/Products/340523,:... Temperature of the above-grade or below-grade walls this is only possible when construction is still occurring: do not vents! Halo Interra foam board to fill that gap with an impermeable material ( e.g bottom of the space.