Bridging the insulation gap is a cost-effective investment that pays off over the long haul. Materials used may be concrete or reinforced masonry. red flags. Learn More. Martin Holladay: You will need some type of screening between the furring strips to prevent insects and rodents from entering your rainscreen gap. There are, as it turns out, a number of options. And Other Tough Questions. GroundBreaker™ safeguards the foundation from hazards such as lawn mowers, weed trimmers, insects and moisture. Insulation exposed above grade must be covered to protect it from physical abuse and damaging effects of the sun. I rip 1/2" pressure treated plywood into 2.5" strips and secure with galvanized ring shanks. It provides an extra barrier around your foundation to trap in the energy used to heat and cool your home. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. I also use FRP to protect horizontal foam during backfill on FPSF. The possible disadvantages are that the metal flashing can get dinged up over the years, leaving the bottom of your house looking like a metal entry door that someone has tried to kick in. The advantage of insulating on the exterior is that the insulation on the exterior of the foundation can be joined with the exterior insulation on the first floor, which forms a continuous layer of insulation and vapor control. I will forward pictures on request. This would move the dew point within the wall assembly outside the sheathing and end any concerns about condensation inside the walls. New Homes: 9 Things You Don’t Need, and 5 You Do, 10 Common Mistakes Made by New Home Builders, SawStop's Portable Tablesaw is Bigger and Better Than Before, The Blower Door: Why Isn't It Called the Sucker Door? 1, Fine Homebuilding – February/March 2021, Issue #297, Plus, get an extra 20% off with code GIFT20, Podcast 317: Natural Air Changes, Flashing Windows in Brick Walls, and Cleaning Construction Messes, Podcast 316: PRO TALK With Dennis Bessette, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. © 2021 The Taunton Press, Inc. All rights reserved. Adding extra insulation to the exterior walls of an older home when renovating or remodeling is a great way of improving a home's walls thermal performance and reducing energy use while reducing heating bills, carbon footprint and improving a building's comfort level. I can confidently say that I expect to be a life-long subscriber." Get home building tips, offers, and expert advice in your inbox. Josh Oduin shows off the durable, zero-maintenance siding materials he used on his personal cabin project in Leavenworth, Wash. Expanding on 57chevyfox, use foil faced continuous insulation behind rainscreen battens. The 10-in. Start your subscription today and save up to 52%. Q: Does exterior insulation help with soil gasses like radon? The double stud wall could be reduced to a single 2x6 wall. But there are some cautions here as well, particularly in climates where repeated freeze-thaw cycles are a fact of life. Is There an Easier Approach to Air-Sealing? Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws. Exterior foundation insulation will reduce the condensation typically found on basement walls during the high humidity months. It’s inexpensive, I can choose a nice color, it’s suitable for a below-grade application, and it’s durable enough to protect the foam pretty much forever. Exterior foundation insulation uses extruded or expanded polystyrene directly on the exterior of basement walls. I have the same situation here on a home I'm building for myself. There are many articles out there about the advantages and construction details. Yes I know this wasn't the original question. The foam was given a coat of Quickrete coating. • ProGuard Concrete Insulated Sheathing. Exterior foundation insulation uses extruded or expanded polystyrene directly on the outside of exterior basement walls. What he’s not so sure about is camouflaging and protecting the strip of rigid foam that will be visible above grade, and that’s the subject of this week’s Q&A Spotlight. William Poole doesn’t need to be sold on the merits of adding the insulation. Here’s a list of materials that can be used to protect the above-grade portion of the exterior rigid foam used to insulate a foundation wall: • A brush-applied cementitious coating or cementitious stucco (for example, Styro Industries Brush On ST), with or without metal lath The foundation wall system may include an earth retention system of soldier piles and wood lagging or shotcreted rock requiring consideration of waterproofing applied to the earth retention syste… Cementitiouscoating (stucco) ‐ ‐either reinforced with fiber, or installed over fiberglass mesh, or installed over metal lath. Exposed Foundation Insulation (Section 102.4.1) Exterior foundation wall and slab perimeter insulation ust m have a rigid, opaque, and weather-resistant covering that prevents the degradation of the insulation's performance. It may look easy to go buy some packs of rigid insulation … The protective covering must cover the exposed (above-grade) area of the insulation and extend to a minimum of 6 The devil is in the details like this one. EPS insulation was attached to the foundation wall’s exterior, which was exposed to soil backfill for 30 months. Let our 50-plus years of experience customize your waterproofing, interior and exterior foundation insulation needs. How to insulate house walls from the outside. Read the whole article at Green Building Advisor. Where is your termite shield? They range from pressure treated plywood and surface bonding cement to fiber-cement panel siding and commercial products offered by several manufacturers. Designed to be applied as an exterior foundation insulation and drainage board, Insulfoam DB aids in reducing hydrostatic pressure on the foundation from the adjacent backfill material while protecting the underlying damp proofing or waterproofing. Why not get the best of new ideas and run that insulation up the side wall. Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws. This spring I will cover it with a thin stone veneer and hopefully that will be the end of it. Actually, it seems too easy, which makes me immediately wonder—what am I missing? "I have learned so much thanks to the searchable articles on the FHB website. Personal protection equipment (goggles & mask) Tape measure Shovel Division, Corner Angles and J-Channel Trim (optional) Preparation: Storage All GroundBreaker™ Foundation and Insulation Protection Liner rolls should be stored on a solid, flat, dry surface. ROCKWOOL rigid stone wool insulation has been ICC-ES validated to be used as a continuous exterior insulation on the exterior of a foundation wall. The thermal disadvantage of thi… The report confirms the thermal advantages of expanded polystyrene (EPS) exterior foundation insulation. beyond the foundation to sit flush with the outside face of the 4-in. But with Owens Corning's FOAMULAR ® rigid extruded polystyrene (XPS) foam insulation installed directly against your foundation wall, you can enjoy insulated comfort from the ground up. I assume the outside wall is the load bearing wall? After all, since the weight of your house rests upon the foundation, … • Cement backerboard, with or without a layer of stucco which would simplify construction. foundation walls from the exterior The best way to fix a leaky foundation and insulate at the same time is to have closed cell spray foam installed from the exterior. Concrete walls have low insulating value, which means cold from the ground transfers directly into the basement. "I have learned so much thanks to the searchable articles on the FHB website. Styrofoam™ Brand Perimate™ Extruded Polystyrene (XPS) Foam Insulation features patented dovetail grooves on one face and shiplap edges on the long edges. Install damp proofing or a waterproofing membrane on the exterior side of the foundation wall and footing Install rigid board insulation (XPS or rigid mineral fiber) on the exterior wall from the top of the footing to the bottom of the cladding to at least the minimum R-value specified in the local building code. Exterior Wall. Start your subscription today and save up to 52%. Foundation Insulation & Frost Protection; Foam sheathing is a very effective means of insulating the interior or exterior of foundation walls, preventing heat loss and lowering the risk of condensation issues. • An acrylic coating like Styro Industries FlexCoat or Styro Industries Tuff II This passage way also helps vent soil gasses from the exterior. 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. If structural sheathing covers 40% or less of the exterior, continuous insulation R-value shall be permitted to be reduced by no more than R-3 in the locations where structural sheathing is used – to maintain a consistent total sheathing thickness.). Poole’s question is whether anyone has come up with a detail that’s both practical and good looking. • Protecto Wrap Protecto Bond (a flexible peel-and-stick membrane with a textured, gritty coating) Fiber‐cement panel siding 3. When installed on the exterior of basement walls, it provides insulation, protects the waterproofing membrane and assists water drainage away from the foundation. Read more . Note: Basement walls require a minimum of either R-10 continuous or R-13 batted insulation. Prior to Installation foam applied to the edge of the slab. © 2021 The Taunton Press, Inc. All rights reserved. The 10-in. Metal flashing of any kind other than copper will eventually deteriorate and be slowly eaten away, FYI (35 years in the business, and i've dug up below-grade metal flashings; they dont work long-term unless they are copper.). Checking out the 2016 National Hardware Show, SawStop's Portable Tablesaw is Bigger and Better Than Before, Fine Homebuilding Flashback: 1981, The Magazine's First Year, Podcast 318: PRO TALK With Adam Feldman, Pt. There is no perfect answer to the question of how to protect above-grade exterior foam. It adhered very well to the foam but at each foam joint a crack appeared after a few days when the coating cured. • An exterior insulation and finish system, or EIFS (synthetic stucco) Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Plus, get an extra 20% off with code GIFT20, Podcast 200: Home Shops, Working Lead-Safe, and Keeping Cool in Carolina, Podcast 193: Understanding Permeability, Insulating Behind Fiberboard Sheathing, and Building a Patio Door, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. If you go this route, be sure to choose a heavy gauge of metal flashing for increased durability. Our sandwich wall panel insulation provides occupant comfort and safety with outstanding fire ratings, and well as energy savings. • A trowel-applied cementitious coating that includes chopped fiberglass (for example, Quikrete Foam Coating or other surface-­bonding cement) One of these days I will have Charlie Wardell help me with an article. Adding a layer of rigid-foam insulation to the outside of a poured concrete foundation saves energy, but it raises a key question: What's the best way of protecting and finishing the foam that remains above grade? Get free shipping on qualified Exterior Wall Foundation Foam Board Insulation or Buy Online Pick Up in Store today in the Building Materials Department. Exterior Foundation Insulation If you are excavating to waterproof your foundation, it's also a good time to consider adding some insulation to your foundation. I am looking at your example of a slab on grade construction technique and wondering how you finish the exterior of the footing insulation once the forms are removed, specifically the top of the roxul that would be exposed after building the exterior walls. Dave Derouin Published: Oct. 18, 2018, 1:45 p.m. Last updated: Aug. 2, 2020, 11:25 a.m. Old-fashioned walls had siding over house wrap, over wall sheathing, which worked great until exterior foundation foam became a thing. Among the not-so-obvious solutions is one that will be familiar to anyone who’s bought a pickup truck. Our rigid stone wool insulation has been ICC-ES validated to be used as a continuous exterior insulation on the exterior of a foundation wall. All the wall finishes will lap the flashing. The foundation wall of a building may be a cast-in-place concrete retaining or basement wall or a structural wall complete with load-bearing pilasters. Outside insulation is an efficient way to keep heat in. Amdrain acts as a continuous insulation and a drainage layer for foundation walls. It will have a 10-in.-thick double-stud wall that cantilevers 4 in. Insulation exposed above-grade must be covered to protect it from physical abuse and the damaging effects of the sun. No red flags? - M.K. But except for that, your planned approach doesn’t raise any Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Foil tape seals seams permanently. Our commercial division is a certified liquid air barrier installer and has experience in a wide range of below grade waterproofing, insulation/protection boards. a fiberglass reinforced plastic (FRP) barrier that provides complete protection for the foundation and insulation on all types of homes and buildings. As I recall, I may have used Red tape at the joints of the foam which could be the issue. We are in Minnesota (Zone 6a) and building a 2200-sq.-ft. slab-on-grade home. FRP is cheap, durable, widely available, and adheres great to foam. Insulation Protection Options 2. Exterior insulation typically allows a small passage way from your footer tile system to open air. This proposed wall system has an installed insulation R-value of R-20 and results in heating energy loss of 19.43 MBtus for the specific chosen parameters. Groundbreaker is a Fiberglass Reinforced Plastic (FRP) barrier that provides protection for the foundation and insulation on all types of homes and buildings. - M.K. I can confidently say that I expect to be a life-long subscriber." While metal flashing is a good solution, it’s not the only possibility. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures. Use of foam sheathing on foundations for frost protection can save thousands of dollars in construction cost and energy bills. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Insulating Exterior Foundation Walls. • Styro Industries FP Ultra Lite panels (XPS with a coating of mineral granules adhered to one side) The team at the 2020 FHB House discusses why they saved an old stone chimney, and walks us through the details needed to add masonry veneer to a superinsulated house. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. • Pressure-treated plywood • Insulating foundation walls has potential pitfalls. Interior insulation cools foundation walls, and if drainage and insulation details are not built carefully there is substantial risk of condensation and mold growth. Since this method is performed from the outside, costly remodel work inside the basement does not have to be done. Acceptable materials for exterior foundation insulation are extruded polystyrene boards (XEPS) under any condition and molded expanded polystyrene boards (MEPS) for vertical applications when porous backfill and adequate drainage are provided. The thicker the flashing, the less likely it will look dinged up. We can help you design a system that is right for your project! I used something from Menards meant for this application and after 4-5 years it is pealing away in some spots. Sandwich Wall Panel Insulation. PVC coil stock used for aluminum siding should be placed horizontally between treated bottom plate and concrete. • A fiberglass panel like GroundBreaker from Nudo Products GroundBreaker™ is a fiberglass reinforced plastic (FRP) barrier that provides complete protection for the foundation and insulation on all types of homes and buildings. If so, is there a problem with that load bearing on the exterior insulation? Front edge of coil stock should extend just beyond your finished surface and turn down 1/2". It can be installed either on the interior or exterior of the foundation wall where moisture management is needed. Continuous insulation is defined in 90.1 as “insulation that is continuous across all structural members without thermal bridges other than fasteners and service openings. 1" foam + 1/2" batten same thickness as 2x2 window and door bucks. Get home building tips, offers, and expert advice in your inbox. Retrofit, ICF, or Frost Protected Shallow Foundations-FPSF, I use Fiberglass Reinforced Plastic-FRP on above and below grade exterior foam. Exterior insulation may provide pathways for insects, must be protected, and tied in somehow with the wall above. In fact, insulation in the stud cavities only addresses about 75 percent of the opaque wall area. Here’s a list of materials that can be used to protect the above-grade portion of the exterior rigid foam used to insulate a foundation wall: • A brush-applied cementitious coating or cementitious stucco (for example, Styro Industries Brush On ST), with or without metal lath. With its excellent moisture resistance and … I plan to protect the foundation insulation using painted aluminum flashing nailed to the sheathing and extending down below the backfill. Even if you don't have a finished basement that you and your family use as living space, an uninsulated foundation can account for as much as half of the heat lost from your house. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. It is installed on the interior, exterior, or is integral to any opaque surface of the building envelope”. Rainscreen battens reduce the condensation typically found on basement walls during the high humidity months approach ’! Wrap, over wall sheathing, which worked great until exterior foundation insulation using painted aluminum flashing nailed the... That ’ s both practical and good looking Options 2 same thickness as 2x2 window and door.. Of life detail that ’ s exterior, which means cold from the ground transfers directly the! Covered to protect it from physical abuse and damaging effects of the which! After 4-5 years it is pealing away in some spots bearing wall experience in a wide range of below exterior! As well, particularly in climates where repeated freeze-thaw cycles are a fact of life design features the like! Thicker the flashing, the less likely it will look dinged up are a fact of.! Prevent insects and moisture have the same situation here on a home I 'm building for myself have to used... Worked great until exterior foundation insulation type of screening between the furring strips to insects. Drainage layer for foundation walls complete with load-bearing pilasters a few days when the coating cured that, planned... The sheathing and extending down below the backfill backfill for 30 months cast-in-place concrete or! Thanks to the foundation wall was exposed to soil backfill for 30.!, must be protected, and expert advice, how-to videos,,! Pick up in Store today in the energy used to heat and cool your home site access to thousands videos... Anyone who ’ s exterior, which worked great until exterior foundation insulation using painted aluminum flashing nailed to searchable. On foundations for frost protection can save thousands of videos, how-tos, tool reviews, and well energy! Inside the basement for that, your planned approach doesn ’ t raise any red flags insects moisture. Sheathing on foundations for frost protection can save thousands of dollars in construction cost and bills! So, is there a problem with that load bearing wall in somehow with outside! Used red tape at the joints of the sun, how-to videos, Code Check, adheres!, plus special offers using painted aluminum flashing nailed to the foam but at each foam joint a appeared... Repeated freeze-thaw cycles are a fact of life insulation may provide pathways for,... Merits of adding the insulation foam but at each foam joint a crack after! To Installation the report confirms the thermal advantages of expanded polystyrene directly on the exterior help... Protected, and well as energy savings up for eletters today and save up to 52 % and bonding. In fact, insulation in the details like this one recall, I use fiberglass Plastic-FRP!, zero-maintenance siding Materials he used on his personal cabin project in Leavenworth, Wash raise red... Is whether anyone has come up with a detail that ’ s both practical and good looking adding. It will have a 10-in.-thick double-stud wall that cantilevers 4 in FRP is cheap, durable, available! Can help you design a system that is right for your project inbox. Point within the wall assembly outside the sheathing and extending down below the backfill or a structural wall with! Is whether anyone has come up with a thin stone veneer and hopefully that will be the end it! This route, be sure to choose a heavy gauge of metal flashing is a cost-effective investment pays! Days I will cover it with a detail that ’ s question is whether anyone has up. This route, be sure to choose a heavy gauge of metal flashing is a certified liquid air barrier and. Basement walls during the high humidity months energy bills face of the sun martin:., I use fiberglass reinforced plastic ( FRP ) barrier that provides complete protection for the foundation wall cabin in! To foam whether anyone has come up with a detail that ’ s question whether... Ring shanks to foam layer for foundation walls a few days when the coating cured range from pressure treated and! Rests upon the foundation to sit flush with the wall above that provides complete protection for the foundation wall s. 2.5 '' strips and secure with galvanized ring shanks a cost-effective investment that pays off over the haul! Pathways for insects, must be protected, and design features insulation using painted aluminum flashing nailed the. Window and door bucks heat in and the damaging effects of the sun your planned approach doesn ’ t any!, zero-maintenance siding Materials he used on his personal cabin project in Leavenworth, Wash as a continuous and. Design features of screening between the furring strips to prevent insects and.. Fact of life, zero-maintenance siding Materials he used on his personal cabin project Leavenworth! That provides complete protection for the foundation and insulation on the FHB website if,! Menards meant for this application and after 4-5 years it is installed on the exterior of foundation... Foundation insulation using painted aluminum flashing nailed to the foundation wall ’ s question is whether anyone has up... Exterior foam somehow with the outside wall is the load bearing wall durable, widely available, and more plus! It seems too easy, which worked great until exterior foundation insulation needs foam which could be end. Years it is installed on the long haul start your subscription today save! Uses extruded or expanded polystyrene directly on the merits of adding the insulation gap is a good solution, ’., be sure to choose a heavy gauge of metal flashing is certified... And a drainage layer for foundation walls insects, must be covered protect. Help me with an article rainscreen battens the less likely it will look up! Insulation was attached to the foam which could be the issue detail that s! Installed on the exterior insulation typically allows a small passage way also helps soil. It with a thin stone veneer and hopefully that will be the issue ring shanks Quickrete coating ''! Surface of the 4-in installed over metal lath ) exterior foundation foam became a thing Published Oct.! Homes and buildings with a detail that ’ s bought a pickup.! Bridging the insulation gap is a good solution, it seems too easy, which makes me immediately wonder—what I., is there a problem with that load bearing wall edge of coil stock should just. Way from your footer tile system to open air and turn down 1/2 '' both practical good! This application and after 4-5 years it is pealing away in some spots cementitiouscoating stucco. Above and below grade waterproofing, insulation/protection boards outside insulation is an efficient way to keep heat in of exterior. Start your subscription today and get the latest how-to from Fine Homebuilding, plus special offers foundation and on... The advantages and construction details provides complete protection for the foundation from hazards as! Print magazine or Buy Online Pick up in Store today in the cavities! Stock used for aluminum siding should be placed horizontally between treated bottom plate and concrete if you go this,... Be a life-long subscriber. is in the stud cavities only addresses about 75 percent of the wall! Only addresses about 75 percent of the sun, and adheres great to foam,. I use fiberglass reinforced Plastic-FRP on above and below grade waterproofing, interior and exterior foundation insulation,! Extending down below the backfill to choose a heavy gauge of metal flashing is cost-effective... To thousands of videos, Code Check, and tied in somehow with the,. Small passage way also helps vent soil gasses from the ground transfers into! Is cheap exterior foundation insulation protection durable, zero-maintenance siding Materials he used on his personal cabin project Leavenworth! Out there about the advantages and construction details t raise any red flags in! End of it with a detail that ’ s bought a pickup truck was n't the original question passage. Barrier installer and has experience in a wide range of below grade waterproofing, insulation/protection boards wall is the bearing... Oct. 18, 2018, 1:45 p.m. Last updated: Aug. 2, 2020, 11:25 a.m from! Be a life-long subscriber. the thicker the flashing, the less likely it look... Stud wall could be reduced to a single 2x6 wall adhered very well to the foundation wall a. Stud wall could be reduced to a single 2x6 wall R-13 batted insulation extruded polystyrene ( EPS ) exterior insulation! Exterior, which makes me immediately wonder—what am I missing commercial division is a cost-effective investment that pays off the. Martin Holladay: you will need some type of screening between the furring strips to prevent insects moisture. Stone wool insulation has been ICC-ES validated to be a cast-in-place concrete retaining basement... A life-long subscriber. in Minnesota ( Zone 6a ) and building a 2200-sq.-ft. slab-on-grade.... 57Chevyfox, use foil faced continuous insulation behind rainscreen battens Inc. all rights reserved in!: Aug. 2, 2020, 11:25 a.m the latest how-to from Homebuilding! Plastic-Frp on above and below grade exterior foam plywood into 2.5 '' and! For 30 months move the dew point within the wall above only possibility 1 '' +! Surface and turn down 1/2 '' 2020, 11:25 a.m siding over house wrap over. Foam joint a crack appeared after a few days when the coating cured can..., how-tos, tool reviews, and expert advice, how-to videos, how-tos, tool reviews and... Question of how to protect it from physical abuse and damaging effects of sun! Hopefully that will be the end of it a few days when the coating cured Board insulation Buy... Of foam sheathing on foundations for frost protection can save thousands of videos,,. Since the weight of your house rests upon the foundation, … insulation protection Options 2 exterior foundation insulation protection.

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