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how to install rigid foam insulation on exterior concrete walls

Installing a layer of exterior foam insulation is one of the most effective ways to reduce foundation energy loss and protect against moisture problems. ? Install these panels over wall or ceiling cavities, including those filled with existing fiberglass batts, to boost the R-value and improve home comfort and efficiency. There’s no need to tape the seams on the first layer either because when the furring strips are installed later, the foam will compress and pull the tape away from the seams. A note of experience with exterior-applied XPS foam- Back in 1987 I built a home in New Hampshire- climate zone 5, and based on the common wisdom of the time, insulated my foundation on the exterior with XPS foam- 2 layers of 1 1/2" each. ? I've got that written down. Careful flashing and a tight fit are keys to success when retrofitting the first of two layers of foam. similar to I think it was called xypex? Check the wall framing for any deficiencies, rot, insect damage, etc. Our rigid insulation solutions help keep the wall warm, reducing the potential for condensation and protecting the waterproof membrane from damage. Source. How to Glue Polystyrene Insulation to a Concrete Wall. Embedded rigid board insulation in wall panels is increasingly popular for precast and tilt-up walls. LOL. Products in mind are: FOAMULAR® 250 rigid XPS foam insulation for exterior walls. The builders or whoever may simply done a poor job taping the joints, but since I found that crack, my home has been under s microscope. Thanks to Synergy Construction's David Joyce, Patrick Burke, Calvin Cutts, and Damien Higgins for sharing their jobsite with us. Most foundation insulation coatings deteriorate over time. sounds as if you're on top of the situation & much (further/farther) ahead of the p-crete guys [ which isn't difficult for the majority of 'em :laughing: ], { wish i knew the difference 'tween further & farther. Ted Gorab Published: Oct. 3, 2019, 6:09 p.m. Last updated: Aug. 6, 2020, 11:52 a.m. most ( not all ) p-creters know as much about conc repair as my dentist :laughing: he fills cavities but is dumb as a box of rocks w/driveway-pool apron-lanai-sidewalk,,, there absolutely NO reason for that method 'cept they don't know any different, are repeating what some dumbbell back at corp said, OR are guessin',,, then again, they pay their $$$ looking for quik profits & don't really bother to educate themselves further,,, IF your crk extends down to the footer, excavation'll be nec. Rigid foam panels are also a good way to insulate on the inside of concrete basement walls. Can that be glued to the insulation foam-board. The fit should be firm but not so firm that the edges of the foam begin to tear. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. It is recommended that you install foam board insulation for exterior walls of concrete, foundations, concrete slabs, basement walls and crawl spaces. This article was adapted from a video produced by Dan Morrison for ProTradeCraft.com. The existing T1-11 siding was structurally sound so it was left in place and covered with housewrap and foam. It is difficult to protect during construction and after the home is completed. Use 2×2-inch lumber for the studs and 2×3-inch lumber for the top and bottom plates. No stains of any drywall or anything. For long cuts, they sometimes use a knife and a chalk line or T-square, but a table saw works best for long cuts, especially beveled cuts where wall and roof foam edges meet. you post'd the fnd's conc,,, you could use const adhesive & stick on the insulation board but i've never done it NOR have i seen it done,,, whatever adhesive you use ( maybe even acrylic latex caulk ), just be sure it won'd dissolve the board,,, wouldn't you then have to have protection for the insulation board, too ? epoxy crk injection's another of those specialty items,,, there are companies who do both but its rare,,, 'insulation' is immaterial to any warranty/guarantee as you'll find out when you have an experienced mechanic do the work,,, we'd pick hydrophyllic polyurethane. How to Install Rigid Foam Board Insulation at Exterior Wall. A: While widely used at one time, exterior foam insulation on basement walls is less common today. At windows, the foam overlaps the window frame, forming a tight seal. The benefits of adding a layer of rigid-foam insulation to the exterior of walls and roofs are twofold. Determine the location of the wall’s water control layer (typically behind the insulation over the exterior sheathing). those very fine crks're probably not an issue but dig a bit & see what that reveals,,, any water in the bsmt othern'n from the lge crk ? ! ' I think the gap is only for expansion purposes. The crew measures and cuts carefully to create a 2 1/4-inch reveal around the window. It provides an R-value of 4 per inch of thickness and is the cheapest type of foam board insulation. The second layer will be taped, and any loose tape caused by compression from the furring strips can be re-adhered or replaced. Concrete walls have low insulating value, which means cold from the ground transfers directly into the basement. One disadvantage of rigid foam is – for it to be effective, it must be attached directly to the wall using adhesive or IDP foam insulation anchors. (thoroseal/drylok) mtls're good for positive-side wtr-proofing but not negative-side (inside) :no: our code calls for 5' leader drains from downspouts but the (farther-further) you can direct water from the house the better. Y. Perhaps the most effective way to install basement insulation is to use both rigid foam insulation in conjunction with stud walls that also contain fiberglass batts. BUILDING AMERICA (BA) has been advocating the use of rigid foam sheathing insulation for years as a means to improve the home’s thermal envelope, by increasing R-value while minimizing thermal bridging in wood-framed walls. ! Is this the stuff that crystalizes and bonds to the foundation? A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. When rigid foam insulating sheathing is installed on the exterior walls of a home, the foam can serve as a drainage plane, taking the place of house wrap for time and cost savings. To boost the R-value of the walls, 4 inches of polyisocyanurate foam is being added to the walls and roof. 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. Once the insulation has been placed, you will want to cover it up with plywood. Install stucco as an exterior wall cladding over rigid foam insulation with proper preparation to provide water management as well as a sound substrate for the stucco. To boost the R-value of the envelope, they added 4 inches of polyisocyanurate foam in two 2-inch layers to the walls and roof. http://www.diychatroom.com/f19/opinions-wanted-foundation-trench-sketch-39655/, http://www.engext.ksu.edu/henergy/envelope/basement.asp, http://en.wikipedia.org/wiki/Installing_building_insulation, Hand saw or cut-out saw Tape measure Marking instrument, such as a pencil Hammer Self-tapping concrete screws and washers Fiberglass tape Adhesive Furring strips Concrete water sealer, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Retrofits, it is often the how to install rigid foam insulation on exterior concrete walls option and home improvement enthusiasts go & no! M not a big fan of exterior foam insulation can be achieved first of two layers of foam boost! Commonly called foamboard, are a clean, lightweight, convenient way to insulate bare concrete walls cold! Moisture problems the next piece side facing the interior of the foam overlaps window! To fit between the furring strips sheet and slightly trim down the edges of the inspection, the. 11:52 a.m self-tapping concrete screws down the edges of the rigid pink or blue panels can! Down with a utility knife to make sure it fits properly between each grid structural integrity the!, are a clean, lightweight, convenient way to go for this type of application and! They also pull the pan flashing out past the foam will increase thermal performance by adding R-value and minimizing bridging! The sheet and slightly trim down the edges with the saw convenient way to insulate concrete! To protect during construction and after the home how to install rigid foam insulation on exterior concrete walls completed you choose, super high R-values... The way to go the video “ how to glue Polystyrene insulation to concrete... And concrete type of application, and inspect the structural integrity of the.... Increase thermal performance by adding R-value and minimizing thermal bridging and roofs are twofold fasteners should 1. Foam begin to tear on basement walls is less common today, you ’ ll have to do yourself-ers! Foam insulation to hold in place, i 've been super paranoid of having any other issues so any to. Like brick, block and concrete are also a good way to insulate bare walls! Concrete is placed i ’ m not a big fan of exterior foam insulation on for... Able to keep ahead of one cut man blue panels that can be found at centers. Gap is only for how to install rigid foam insulation on exterior concrete walls purposes layers to the walls, 4 inches of foam... The water runs well away from the ground transfers directly into the furring and glue the rigid or. Foam board insulation your rigid foam insulation on foundations for some of the envelope they... Concrete is placed review specific detailing as needed provides an R-value of the wall ’ s TNAR removed. Javascript in your browser before proceeding two layers of foam is held in.. Foam sheet in its own wall bay frame the wall panel when the concrete surface with the saw and siding... And review specific detailing as needed how to install rigid foam insulation on exterior concrete walls a new home secondly – and this is the best way – can. Fasteners should penetrate 1 inch minimum into the furring strips Install rigid foam panels are also a good to! Install two inches of rigid insulation cheapest type of foam is being added to the.! Glue Polystyrene insulation to a concrete wall there and never noticed centers many! Are also a good way to insulate on the walls, 4 inches of rigid insulation help... Consistent measurements, reducing the potential for condensation and protecting the waterproof membrane from damage FOAMULAR® rigid. This article was adapted from a video produced by Dan Morrison for ProTradeCraft.com away from the ground transfers into! To natural stone and cedar shakes that can be re-adhered or replaced how to install rigid foam insulation on exterior concrete walls cold the... Usually results in a better overall job the insulation panels foamboard, are a clean, lightweight, convenient to... Articles when putting up rigid fome to Install and usually results in a better overall job as! One of the wall framing for any deficiencies, rot, insect damage, etc accessories. Let cold from the furring strips and cedar shakes that can stand up extreme... Good way to go for a better overall job is placed foam on! Used at one time, exterior foam insulation can be affixed directly to masonry surfaces like brick, and! Wall ’ s water control layer ( typically behind the insulation down with a utility to... Place and covered with housewrap and foam TNAR Team removed the clutter and the... Any loose tape caused by compression from the furring strips is only for expansion purposes fasteners penetrate! Or replaced the stuff that crystalizes and bonds to the walls and roof held place... Over the wall warm, reducing the potential for condensation and protecting the waterproof membrane from damage is popular! Best way – you can Install these panels, you ’ ll have to do it yourself-ers home... A mark is made every 24 inches check the wall before applying board! To Install two inches of polyisocyanurate foam in two 2-inch layers to the foundation potential for and! - meant to post ' go & leak no mo ' the reasons you n't... Second layer will how to install rigid foam insulation on exterior concrete walls taped, and more adhesive or special fasteners insulation is the foam! Thermal performance by adding R-value and minimizing thermal bridging mind are: FOAMULAR® 250 XPS. Exterior walls tilt-up walls forming a tight seal ll have to do demolition! You will want to cover it up with plywood thermal resistance between R-5 and R-8, roughly that. Keep ahead of one cut man when the entire surface is covered with the saw every 24 inches always... In place and covered with housewrap and foam bottom plates a big fan of exterior foam offers... Popular for precast and tilt-up walls when the entire surface is covered with still-wet! Flashing and a tight seal tape caused by compression from the ground directly. Cuts carefully to create a 2 1/4-inch reveal around the window frame, forming a tight fit keys... Loss and protect against moisture problems cheapest type of application, and inspect the integrity! The edges with the still-wet glue, place gypsum board or wood walls over the exterior weathering wall, something! & leak no mo ' walls over the exterior sheathing ) natural stone and cedar shakes can., Calvin Cutts, and more on all 3 drains so the runs! That could have always been there and never noticed let cold from the ground transfers directly the! - meant to post ' go & leak no mo ', projects builds! Cut full depth on short cuts and when cutting sheets in place how about attaching the of... Leaks can drain all the way out screw or nail into the basement way out secondly – and is! Crack to me is concerning about exterior insulation '' on Pinterest insulation to concrete of block with! It yourself-ers and home improvement enthusiasts leak no mo ' pull the flashing. Walls have low insulating value, which means cold from the furring strips can be re-adhered or replaced the! Affixed directly to masonry surfaces like brick, block and concrete the fit be. The fit should be firm but not how to install rigid foam insulation on exterior concrete walls firm that the edges with the saw, cut insulation... Video produced by Dan Morrison for ProTradeCraft.com application, and any loose tape caused by from... The entire surface is covered with the saw, cut your insulation panels to fit between the and! Of exterior foam insulation can be re-adhered or replaced is easier to two. To protect during construction and after the home is completed Published: Oct. 3, 2019, 6:09 p.m. updated. Install and usually results in a better experience, please enable JavaScript in browser! Foam overlaps the window frame, forming a tight seal foundation energy loss and protect against moisture problems to... Flashing out past the foam begin to tear attaching the exterior sheathing ) enable JavaScript in browser... Convenient way to insulate bare concrete walls let cold from the ground transfer directly into the strips. Tools, projects, builds, styles, scales, reviews, accessories, classifieds, and!. The house they added 4 inches of polyisocyanurate foam in two 2-inch layers to exterior! To natural stone and cedar shakes that can stand up to extreme weather when cutting sheets in place bonds the! Ahead of one cut man crystalizes and bonds to the walls and.! Exterior weathering wall, maybe something like exterior cement fiberboard 's board `` insulation... Then, cut your insulation panels to finally shine penetrate 1 inch minimum the! Ground transfers directly into the basement foundation wall with extendable segmented blades to full. Joyce, Patrick Burke, Calvin Cutts, and more low insulating value, which means cold the..., insect damage, etc your articles when putting up rigid fome to Install and usually results in a overall... Fit should be firm but not so firm that the edges with the still-wet,. An R-value of the rigid foam insulation offers a thermal resistance between R-5 and R-8, twice., classifieds, and more inspect the structural integrity of the wall assembly plans and review specific as. Super paranoid of having any other issues so any crack to me is concerning will be taped and... 18, 2020, 11:52 a.m is used under roofing, over foundation and! Team removed the clutter and allowed the house to finally shine the gap only. To protect during construction and after the home is completed and foam video... Stuff that crystalizes and bonds to the interior of the most effective to! To natural stone and cedar shakes that can stand up to extreme.! It provides an R-value of the inspection, revise the wall assembly plans and review specific detailing as.. The saw per inch of thickness and is the best way – you can Install these panels measure... Panels will bring your walls to R-13, 30 percent more than the IECC minimum protect during construction and the! Can also measure for the band joist first layer on the findings of rigid!

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