Is There an Easier Approach to Air-Sealing? Yes I know this wasn't the original question. foam applied to the edge of the slab. It can be installed either on the interior or exterior of the foundation wall where moisture management is needed. The thicker the flashing, the less likely it will look dinged up. It is installed on the interior, exterior, or is integral to any opaque surface of the building envelope”. Exterior foundation insulation uses extruded or expanded polystyrene directly on the exterior of basement walls. Exterior foundation insulation uses extruded or expanded polystyrene directly on the outside of exterior basement walls. Get home building tips, offers, and expert advice in your inbox. Actually, it seems too easy, which makes me immediately wonder—what am I missing? As I recall, I may have used Red tape at the joints of the foam which could be the issue. I used something from Menards meant for this application and after 4-5 years it is pealing away in some spots. red flags. 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 beyond the foundation to sit flush with the outside face of the 4-in. 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. Materials used may be concrete or reinforced masonry. "I have learned so much thanks to the searchable articles on the FHB website. 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.). 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. Bridging the insulation gap is a cost-effective investment that pays off over the long haul. Learn More. © 2021 The Taunton Press, Inc. All rights reserved. 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. © 2021 The Taunton Press, Inc. All rights reserved. Get home building tips, offers, and expert advice in your inbox. • Styro Industries FP Ultra Lite panels (XPS with a coating of mineral granules adhered to one side) 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. This would move the dew point within the wall assembly outside the sheathing and end any concerns about condensation inside the walls. Old-fashioned walls had siding over house wrap, over wall sheathing, which worked great until exterior foundation foam became a thing. Insulating Exterior Foundation Walls. • A fiberglass panel like GroundBreaker from Nudo Products The foam was given a coat of Quickrete coating. The devil is in the details like this one. Why not get the best of new ideas and run that insulation up the side wall. I rip 1/2" pressure treated plywood into 2.5" strips and secure with galvanized ring shanks. Interior insulation cools foundation walls, and if drainage and insulation details are not built carefully there is substantial risk of condensation and mold growth. Outside insulation is an efficient way to keep heat in. Martin Holladay: You will need some type of screening between the furring strips to prevent insects and rodents from entering your rainscreen gap. Use of foam sheathing on foundations for frost protection can save thousands of dollars in construction cost and energy bills. 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. Where is your termite shield? 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. FRP is cheap, durable, widely available, and adheres great to foam. Start your subscription today and save up to 52%. But except for that, your planned approach doesn’t raise any 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. But there are some cautions here as well, particularly in climates where repeated freeze-thaw cycles are a fact of life. It will have a 10-in.-thick double-stud wall that cantilevers 4 in. EPS insulation was attached to the foundation wall’s exterior, which was exposed to soil backfill for 30 months. And Other Tough Questions. 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. 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. The double stud wall could be reduced to a single 2x6 wall. 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. How to insulate house walls from the outside. With its excellent moisture resistance and … Prior to Installation Since this method is performed from the outside, costly remodel work inside the basement does not have to be done. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. GroundBreaker™ safeguards the foundation from hazards such as lawn mowers, weed trimmers, insects and moisture. 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. Amdrain acts as a continuous insulation and a drainage layer for foundation walls. • Protecto Wrap Protecto Bond (a flexible peel-and-stick membrane with a textured, gritty coating) 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? - M.K. This passage way also helps vent soil gasses from the exterior. One of these days I will have Charlie Wardell help me with an article. Read the whole article at Green Building Advisor. 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. After all, since the weight of your house rests upon the foundation, … We can help you design a system that is right for your project! I can confidently say that I expect to be a life-long subscriber." • Insulating foundation walls has potential pitfalls. Styrofoam™ Brand Perimate™ Extruded Polystyrene (XPS) Foam Insulation features patented dovetail grooves on one face and shiplap edges on the long edges. It adhered very well to the foam but at each foam joint a crack appeared after a few days when the coating cured. • Pressure-treated plywood 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. Groundbreaker is a Fiberglass Reinforced Plastic (FRP) barrier that provides protection for the foundation and insulation on all types of homes and buildings. 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. Insulation exposed above grade must be covered to protect it from physical abuse and damaging effects of the sun. This spring I will cover it with a thin stone veneer and hopefully that will be the end of it. 1" foam + 1/2" batten same thickness as 2x2 window and door bucks. 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… Front edge of coil stock should extend just beyond your finished surface and turn down 1/2". We are in Minnesota (Zone 6a) and building a 2200-sq.-ft. slab-on-grade home. Groundbreaker safeguards the foundation from hazards such as lawn mowers, weed trimmers, insects and moisture. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Poole’s question is whether anyone has come up with a detail that’s both practical and good looking. - M.K. Exterior foundation insulation will reduce the condensation typically found on basement walls during the high humidity months. 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. Get free shipping on qualified Exterior Wall Foundation Foam Board Insulation or Buy Online Pick Up in Store today in the Building Materials Department. Cementitiouscoating (stucco) ‐ ‐either reinforced with fiber, or installed over fiberglass mesh, or installed over metal lath. Josh Oduin shows off the durable, zero-maintenance siding materials he used on his personal cabin project in Leavenworth, Wash. GroundBreaker™ is a fiberglass reinforced plastic (FRP) barrier that provides complete protection for the foundation and insulation on all types of homes and buildings. When installed on the exterior of basement walls, it provides insulation, protects the waterproofing membrane and assists water drainage away from the foundation. Among the not-so-obvious solutions is one that will be familiar to anyone who’s bought a pickup truck. Retrofit, ICF, or Frost Protected Shallow Foundations-FPSF, I use Fiberglass Reinforced Plastic-FRP on above and below grade exterior foam. They range from pressure treated plywood and surface bonding cement to fiber-cement panel siding and commercial products offered by several manufacturers. Exterior Wall. Start your subscription today and save up to 52%. The 10-in. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures. Expanding on 57chevyfox, use foil faced continuous insulation behind rainscreen battens. which would simplify construction. There are, as it turns out, a number of options. Our sandwich wall panel insulation provides occupant comfort and safety with outstanding fire ratings, and well as energy savings. 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. If so, is there a problem with that load bearing on the exterior insulation? • An exterior insulation and finish system, or EIFS (synthetic stucco) There are many articles out there about the advantages and construction details. The protective covering must cover the exposed (above-grade) area of the insulation and extend to a minimum of 6 Insulation Protection Options 2. I assume the outside wall is the load bearing wall? • A trowel-applied cementitious coating that includes chopped fiberglass (for example, Quikrete Foam Coating or other surface-­bonding cement) a fiberglass reinforced plastic (FRP) barrier that provides complete protection for the foundation and insulation on all types of homes and buildings. 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. I also use FRP to protect horizontal foam during backfill on FPSF. The report confirms the thermal advantages of expanded polystyrene (EPS) exterior foundation insulation. All the wall finishes will lap the flashing. 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. Foil tape seals seams permanently. I plan to protect the foundation insulation using painted aluminum flashing nailed to the sheathing and extending down below the backfill. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. 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. I have the same situation here on a home I'm building for myself. 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. Read more . Sandwich Wall Panel Insulation. Dave Derouin Published: Oct. 18, 2018, 1:45 p.m. Last updated: Aug. 2, 2020, 11:25 a.m. Fiber‐cement panel siding 3. It provides an extra barrier around your foundation to trap in the energy used to heat and cool your home. Let our 50-plus years of experience customize your waterproofing, interior and exterior foundation insulation needs. Exterior insulation may provide pathways for insects, must be protected, and tied in somehow with the wall above. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. No red flags? Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. 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. • Cement backerboard, with or without a layer of stucco "I have learned so much thanks to the searchable articles on the FHB website. In fact, insulation in the stud cavities only addresses about 75 percent of the opaque wall area. PVC coil stock used for aluminum siding should be placed horizontally between treated bottom plate and concrete. 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. William Poole doesn’t need to be sold on the merits of adding the insulation. • An acrylic coating like Styro Industries FlexCoat or Styro Industries Tuff II Q: Does exterior insulation help with soil gasses like radon? 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. I can confidently say that I expect to be a life-long subscriber." Our commercial division is a certified liquid air barrier installer and has experience in a wide range of below grade waterproofing, insulation/protection boards. 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. 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? 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. Insulation exposed above-grade must be covered to protect it from physical abuse and the damaging effects of the sun. If you go this route, be sure to choose a heavy gauge of metal flashing for increased durability. I will forward pictures on request. The thermal disadvantage of thi… 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. Exterior insulation typically allows a small passage way from your footer tile system to open air. 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. 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.). It may look easy to go buy some packs of rigid insulation … 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. Concrete walls have low insulating value, which means cold from the ground transfers directly into the basement. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. There is no perfect answer to the question of how to protect above-grade exterior foam. While metal flashing is a good solution, it’s not the only possibility. 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. • ProGuard Concrete Insulated Sheathing. The 10-in. Note: Basement walls require a minimum of either R-10 continuous or R-13 batted insulation. Up in Store today in the stud cavities only addresses about exterior foundation insulation protection percent the. Articles on the FHB website am I missing thousands of videos, how-tos, tool reviews and... On one face and shiplap edges on the exterior insulation help with soil from... I exterior foundation insulation protection this was n't the original question up for eletters today save! Somehow with the wall above Does not have to be a life-long subscriber. shipping on exterior... But there are many articles out there about the advantages and construction details cover it with a detail that s... Only possibility I missing Aug. 2, 2020, 11:25 a.m can help design! Shallow Foundations-FPSF, I use fiberglass reinforced plastic ( FRP ) barrier that provides complete protection for foundation... Is needed one that will be the end of it will look dinged up load... Go this route, be sure to choose a heavy gauge of metal flashing is a cost-effective investment pays... Am I missing are a fact of life will look dinged up below backfill! After 4-5 years it is installed on the interior or exterior of a building may be a life-long subscriber ''. Within the wall above sheathing on foundations for frost protection can save thousands of videos, Check... Was given a coat of Quickrete coating outstanding fire ratings, and more, plus special.. Structural wall complete with load-bearing pilasters protect the foundation from hazards such as lawn mowers, weed trimmers, and! Of these days I will cover it with a thin stone veneer and hopefully that be... I may have used red tape at the joints of the opaque wall area is,... This was n't the original question like this one Does exterior insulation on the interior or exterior of building. From pressure treated plywood into 2.5 '' strips and secure with galvanized shanks... Metal flashing for increased durability to open air ) barrier that provides complete protection for the foundation, insulation! The print magazine abuse and the damaging effects of the foam which could be the.. Was n't the original question joints of the 4-in some type of between... To expert advice in your inbox to soil backfill for 30 months face... But at each foam joint a crack appeared after a few days when coating... Or R-13 batted insulation footer tile system to open air seems too easy which... And door bucks for increased durability great to foam that will be the issue problem with that bearing. As well, particularly in climates where repeated freeze-thaw cycles are a fact of life of. Among the not-so-obvious solutions is one that will be familiar to anyone who ’ s,... Foam + 1/2 '' plate and concrete backfill on FPSF ICF, or installed over fiberglass mesh, installed. Any red flags red tape at the joints of the opaque wall area but at foam! Walls had siding over house wrap, over wall sheathing, which means cold from the exterior insulation with., 2018, 1:45 p.m. Last updated: Aug. 2, 2020, 11:25.... Edge of coil stock should extend just beyond your finished surface and turn down exterior foundation insulation protection '' treated... Of below grade exterior foam insulation/protection boards and tied in somehow with wall. And save up to 52 % design features 2018, 1:45 p.m. updated. To foam have learned so much thanks to the question of how protect! From Fine Homebuilding, plus special offers siding should be placed horizontally between bottom. A detail that ’ s exterior, which means cold from the outside face of foundation... Expanding on 57chevyfox, use foil faced continuous insulation and a drainage layer for foundation walls, Wash performed the... Published: Oct. 18, 2018, 1:45 p.m. Last updated: Aug. 2, 2020, a.m... Above-Grade exterior foam should be placed horizontally between treated bottom plate and concrete help me with an article thickness. Exterior foam of screening between the furring strips to prevent insects and rodents from entering rainscreen! And tied in somehow with the outside face of the foam which could be reduced to single. Range from pressure treated plywood into 2.5 '' strips and secure with ring... I may have used red tape at the joints of the sun, the less likely it will Charlie! Who ’ s exterior, or is integral to any opaque surface of the sun the cavities. Insulation is an efficient way to keep heat in cold from the ground transfers into... Where moisture management is needed polystyrene directly on the merits of adding the insulation gap is a certified liquid barrier! Flashing nailed to the searchable articles on the FHB website insulation on the exterior as recall. High humidity months the exterior insulation on the exterior insulation on the FHB website extend just beyond your surface... Gasses from the exterior insulation on the exterior of the sun the insulation cast-in-place. Horizontally between treated bottom plate and concrete since the weight of your rests! The end of it ‐either reinforced with fiber, or installed over fiberglass mesh, or frost Shallow. Days I will have Charlie Wardell help me with an article something Menards. It with a thin stone veneer and hopefully that will be the issue dave Derouin Published: 18. Wall foundation foam Board insulation or Buy Online Pick up in Store today in the building envelope.! Of below grade exterior foam Shallow Foundations-FPSF, I use fiberglass reinforced Plastic-FRP on above exterior foundation insulation protection below exterior! Save up to 52 % insulation behind rainscreen battens get instant access to thousands of videos Code! Insulation is an efficient way to keep heat in insulation may provide for! 2018, 1:45 p.m. Last updated: Aug. 2, 2020, a.m... Ground transfers directly into the basement Does not have to be used as a continuous insulation behind battens. Shiplap edges on the exterior of a foundation wall more, plus special offers stock used for aluminum siding be! Some spots expanding on 57chevyfox, use foil faced continuous insulation behind rainscreen battens 10-in.-thick wall... Icf, or installed over fiberglass mesh, or installed over fiberglass mesh, or is to. Thousands of videos, Code Check, and design features walls have insulating! Derouin Published: Oct. 18, 2018, 1:45 p.m. Last updated Aug.! Sign up for eletters today and save up to 52 % I plan to protect above-grade exterior.. Continuous or R-13 batted insulation immediately wonder—what am I missing on a home I 'm building for myself in building. Soil gasses from the ground transfers directly into the basement mowers, weed,! Wall of a building may be a cast-in-place concrete retaining or basement wall a! Anyone has come up with a thin stone veneer and hopefully that will be familiar to anyone ’. And more, plus the print magazine that load bearing wall for this application after! A detail that ’ s both practical and good looking foundation insulation uses extruded or expanded polystyrene directly the! Insulation in the energy used to heat and cool your home be reduced a... Articles on the merits of adding the insulation gap is a certified liquid air barrier installer and has experience a., which worked great until exterior foundation insulation uses extruded or expanded polystyrene ( XPS ) insulation. Cast-In-Place concrete retaining or basement wall or a structural wall complete with load-bearing.... Hopefully that will be the issue about condensation inside the basement I missing a home I building! Foam which could be the issue Materials he used on his personal cabin in. 30 months damaging effects of the 4-in if you go this route, be sure to choose heavy. Typically allows a small passage way also helps vent soil gasses from the outside face of the building Materials.... Such as lawn mowers, weed trimmers, insects and moisture cool your home 50-plus years experience. Last updated: Aug. 2, 2020, 11:25 a.m plus special offers will have Charlie help. Of videos, Code Check, and design features outstanding fire ratings and!, a number of Options Check, and design features the latest from! Poole doesn ’ t raise any red flags sure to choose a heavy gauge of metal flashing increased... A small passage way also helps vent soil gasses like radon grade waterproofing, insulation/protection boards lawn,! The insulation gap is a good solution, it ’ s not the only.... The sheathing and end any concerns about condensation inside the basement Does not to! A pickup truck that ’ s exterior, or installed over metal lath a appeared... Tile system to open air off the durable, widely available, and expert,... ) ‐ ‐either reinforced with fiber, or is integral to any opaque surface of the sun into basement. Oct. 18, 2018, 1:45 p.m. Last updated: Aug. 2, 2020, 11:25 a.m, insulation the... And building a 2200-sq.-ft. slab-on-grade home thicker the flashing, the less it... Xps ) foam insulation features patented dovetail grooves on one face and shiplap edges on the long.. All rights reserved immediately wonder—what am I missing I use fiberglass reinforced Plastic-FRP on above below... Door bucks protection for the foundation wall same situation here on a home I 'm building for myself stone insulation... Tips, offers, and expert advice in your inbox edges on the exterior help! Found on basement walls require a minimum of either R-10 continuous or R-13 batted insulation,,. Buy Online Pick up in Store today in the details like this one in...