What I've described isn't at all weird or experimental, and it's used for most new construction nowadays with a few modifications (putting the WRB layer between the foam and sheathing, for example). Foam insulation is affordable and easy to install, making it a smart option for your renovation project. FOAMULAR Family of Products Brochure PDF?V=1588677951000 | 7.13 MB. That is a bunch of hooey, imo. The glue for this stuff sticks to everything (particularily leg hairs). Also, does the rigid foam do away with the need for a home wrap type product or do you double up the moisture barrier? You might as well hang the rigid foam on a clothesline in your yard with giant clothes pins. Each piece comes in a size that rests between studs and joists. rev 2021.1.29.38441, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Also this is not a diy job (asbestos fibres will go right through a regular frspira. Retro fitting baffles does not work to well. Lay the wood perpendicular to the roof joists and use roofing nails to fasten it in place. You can cut shapes to allow it to fit around pipes, ducts, or other obstructions. Install plywood to act as structural roof sheathing. Rigid Foam as Exterior Sheathing txkevin | Posted in Construction Techniques on April 18, 2005 08:39am On a recent episode of Home IQ, i noted that the IBACOS sponsored home used rigid foam insulation as its only form of exterior sheathing (rather than plywood or OSB). The designer and builder of the 2018 Fine Homebuilding House detail why they chose mineral-wool batts and high-density boards for all of their insulation needs. Red flag #3: you imply that you want to attach siding over the OSB surface because all the foam will constitute a vapor barrier. Up north, where you don't have to worry about wind requirements, and the insulation requirements are much stricter, the practice protrayed in the FHB article makes sense to me. Preferably polyiso (best R-value per inch) and preferably foil-faced (radiant barriers are nice, and you can use the foil surface as your water-resistive barrier if you tape the seams properly--no Tyvek!). It seems like a particularly good choice when used with a spray foam insulation such as Icynene or Sealection which would benefit from the added R-value of the rigid foam (no Corbond in Austin Tx to my knowledge). Nothings safe anymore. In theory, in FL one is trying to keep humidity OUT, so the vapor barrier goes on the outside. Benefits of exterior foam •The foam keeps the sheathing warm and dry all winter long, reducing the likelihood that the sheathing will get damp. The question is "is ripping off all the sheathing over doing it or the best option?" If you did, you'd have to hit every stud with your siding nailings and be very careful about over pounding the siding and creatine waves. Can I request a copy of my personal data (GDPR) from email-scammers and sue them if they don't comply? Other builders choose to forgo the plywood or OSB sheathing entirely. Actually it was a brick home so that pretty much protects the walls. You don't want the water vapor to condense at that surface but at least if it would condense under extreme cold you'd want it to quickly dry out to the inside. Using this system moisture from the outside cannot penetrate past the outer layer of the the rigid foam. Condensation concern… Window and door jams will have to be built out unless you can custom them. Thanks for the replies. Will this moisture problem persist after drywall is installed? We have a project that will have 1 1/2" rigid insulation installed above the 5/8" structural roof sheathing. I'm located in Wichita, Kansas. This is especially true in areas with extreme temperatures. 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. Sheathing provides structural integrity, and its other function is to close off the studs. How to Fasten Foamular Insulation Sheathing. It is suitable for wall or ceiling applications in residential, commercial, agricultural and industrial … Then sheathe with plywood. ... respirator's dust filter. Questions about DIY on cedar siding and maybe new windows. This means you either have to cover it with tyvec (making hitting the studs with for your outside finish even more difficult) or use a lot of expanding foam to fill any gaps. Perhaps a brick or stone exterior is required for the equivalent stability though this is not mentioned. Weve done this on 100k houses and one million dollar houses and five million dollar houses. There is; its called Quik-Therm T&G Connect – A exterior rigid extruded polystyrene foam insulation product. Perhaps I just have not noticed. In particular, I wonder if you structural stability is truely comparable to more traditional Plywood or OSB and if there are any moisture or insect concerns that would be different from using the wood products? Are there any biblical examples of Early Church disciples praying to deceased saints in order to request their intercessory prayer? 99% of the time, there won't be an outward vapor drive in the first place but even if there was, the inner surface of the foam wouldn't be a condensation plane because it will be warm, above the dew point (foam is an insulator). Making statements based on opinion; back them up with references or personal experience. -- Mark Twain. Here is a link and excerpt from the article…, http://www.diynet.com/diy/hm_he_walls/article/0,2085,DIY_16823_3278207,00.html<!---->, “Sheathing (figure B) is an added protective layer on the outside of the exterior wall. On a recent episode of Home IQ, i noted that the IBACOS sponsored home used rigid foam insulation as its only form of exterior sheathing, Always nice when you only need a utility knife to break into a house. Usually, the foam is used in brick veneer applications. It's difficult to cut tight enough to not get some gaps that would allow water penetration. How should I insulate a wall I opened up? This study included 2 phases of hygrothermal monitoring in the field of Marine 4 climate zone (Puyallup, Pierce County, Washington) using the foam-over-sheathing configuration. Asking for help, clarification, or responding to other answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Be cautious when taking any framing advice from me. I'm commenting from Australia where we use different terms but a lot of pre '70s fibreboard contains significant amounts of asbestos. Get the stuff removed by licensed removal guys. Can anyone identify what appears to be a crashed WWII German plane? Structural sheathing and diagonal braces installed in walls, parallel to the wind flow, transmit lateral loads safely to the foundation. If you're unfamiliar with the foam-sheathed building approach, I recommend reading some of the documents available at, I wasn't questioning your system; basically just wanted you to explain in more detail how it functions. I covered my entire house in 3/4" extruded polystyrene, but with a 1/2" covering of plywood first. Foam is sometimes applied over the plywood, but it is never a substitute. - M.K. The boards are available in several thicknesses and R-values; 1-inch and 2-inch thicknesses are common. While I was not prepare for 2x6 on 24's I was considering going with 2x4 on 16's with rigid foam as sheathing to benefit from higher R value and better air seal. Install your new windows on the foam, not the sheathing (outie windows). Omega CI is available in 4’ x 8’ sheets in 2.1” thickness (contact Laminators technical support for alternative thickness availability). Why don't adventurers (and monsters) suffocate in lower levels of dungeons? >>"Always nice when you only need a utility knife to break into a house."<<. Rigid insulation … I'm sure it will be sufficient in Texas and other parts of the country that don't have stand up to significant wind-loads (100mph+), but there is no way that rigid foam will provide equivalent strength to rated ply or OSB. Haven't seen it recently, though. Moisture can compromise the performance of cavity insulation and damage drywall, wood framing and OSB or plywood sheathing. Why go through the door when you can so easily kick through a wall? Reminds me of a time when they use to say that drywall could be counted as 'structural sheathing' in earthquake zones. Is my plan to safely remove asbestos siding sound? Any thoughts on the article if anyone has read it yet? If used, care must be taken in the selection of cladding material and detailing to ensure that no significant amounts of water reach the interface between the extruded polystyrene insulation and the vapour permeable sheathing membrane. Rigid foamboard, installed over the plywood sheathing, is less frequently used, though the foil-faced ones are sometimes used in attics as extra insulation + a radiant barrier. In addition to providing high performance and continuous insulation, it helps to increase the structural rigidity of the building. After a substantial amount of research in regards to building an energy efficent house using "conventional" methods, this is how I did mine. We use a Simpson t brace on each corner and that prevents racking. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Styrofoam™ Brand Residential Sheathing provides a one-two punch against moisture. I'd replace it if the opportunity presented itself. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. T&G Connect consists of 3/4” x 2.5” machined plywood furring strips located at 16 inch or 24 inch centers. Opt-in alpha test for a new Stacks editor, Visual design changes to the review queues. While this method has proven to be effective, it was introduced as I refer you to synthetic stucco as an example. Also, what type of insulation and sheathing should I use? It makes applying the outside finish (siding / brick) more difficult as you have to hit the studs with your nails. The illustration shows two layers of OSB or plywood roof sheathing: a lower layer conventionally nailed to the rafters and an upper layer installed as a nailing surface for the roofing material on top of the rigid foam. No problems here in the S.E. Tape the seams and cut neatly. Is it stupid to replace redwood siding with Hardi board or LP SmartSide? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. I hope for the homeowners sake that the builders at least put in some diagonal metal bracing before that foam 'sheathing' went up. While you have the stud cavities open, replace whatever's in there with mineral wool. How to insulate house walls from the outside. If in fact the rigid foam does in fact provide comparable stability as they claim, then it seems like a great choice for our humid TX region (with proper ventilation of course). I just wonder why I don’t see this type of construction in this area and I am not particularly inclined to gamble on it and be first. Guidance on how to install flat or tapered roof insulation over a plywood deck using Kingspan Therma roofing range products. In cold climates the use of exterior rigid insulation sheathing boards has been a method of increasing thermal performance of the enclosure, as well as a means of reducing the condensation potential within exterior wall assemblies. Any condensation issues to battle in FL when Rigid foam is installed over the Plywood sheathing? As amazing as it may seem, there is no requirement for a vapor barrier in the Florida Building Code. What is an acceptable gap between the siding and the wall sheathing? Im assuming that there is metal strapping or wood let ins at the corners. How do hackers trick frontend validation? Of course, they might be wrong too! There appears to be no special bracing and the rigid foam is simply nailed up as if it were plywood. Do you think IBACOS will put there money where their mouth is in 10-20 yrs if that home dose'nt survive a storm. Integrated Water-Resistive Barrier A resin-impregnated, water-resistive barrier manufactured onto the structural panel eliminates the need for housewrap, sheds water to the exterior and is backed by a 180-day Exposure Guarantee [2] . Leaving out sheahing plywood would be insanity. Install vertical furring strips over the foam, and nail your new siding into that. Makes it easier for the bad guys. Was it ever the case that tiles had to be placed consecutively? Rigid foam sheathing is a form of insulation — continuous insulation, to be exact — that’s applied to the exterior of the building. •The foam reduces air leakage. http://www.diynet.com/diy/hm_he_walls/article/0,2085,DIY_16823_3278207,00.html<, The Cornerstones of Comfort: How To Choose the Right Windows and Doors for Your Climate, A Modern California Home Wrapped in Rockwool Insulation for Energy Efficiency and Fire Resistance, Podcast 321: Running Pipes in a Block House, Local Lumber, and Air-Sealing a Garrison Colonial, Podcast 320: PRO TALK With Adam Feldman, Pt. This concept, while not new, has become more accepted in recent years and is being used in residential construction. Cover that with 2+ inches of rigid foam. How did it perform?, There's no structural loss using rigid board. Continuous rigid insulation is a construction solution that provides a thermally efficient building enclosure. Although my experience is limited, I've never seen rotted sheathing or similar problems as a result. Unvented roof strategies with open cell and closed cell spray polyurethane foam (ocSPF and ccSPF) insulation sprayed to the underside of roof sheathing have been used since the mid-1990s to provide durable and efficient building enclosures. It acts like a stressed skin panel and is quite strong as long as the foil isn't damaged. Benefits of Rigid Foam on Top of Sheathing. It only takes a minute to sign up. Rigid insulation sheathing is made of a rigid plastic foam that is typically sold in 4x8- or 4x10-foot boards. Rigid insulation provides thermal protection and it can also serve as an air and moisture … This could be a great cost-saving measure but remember that rigid foam does not have the same structural strength as wood sheathing. This creates drainage cavities that promote drying, and allow the foil surface of the foam to act as a radiant barrier. How to Install Plywood Sheathing; Plywood is very straightforward and fairly easy to install. Then sheathe with plywood. If I buy 1 share of a company's stock, do I get to attend and vote at the next shareholder meeting? I have inherited a 1950s house that has vinyl over original wood siding over old fiber board. It must be being used somewhere. Fiberboard is flimsy and might be damaged in the process of removing the vinyl siding anyway. It's weird to me (I'm a Colorado native), but then again, there are a LOT of weird things in Florida. When I was a framing carpenter we built many houses with blue (Styrofoam) "sheathing". Rigid Foam Sheathing Energy efficiency is a major concern in the building industry. The water-restive barrier that goes outside the OSB or plywood sheathing (usually Tyvek or tar paper) is not a vapor barrier, it's a water barrier. … , Anyone else have experience using the Rigid foam and Brick or Cultured Stone? Having baffles installed between the insulation and the sheathing will create the air space. 2, Podcast 319: Building in a Flood Zone, Who Pays for Warranty Work, and Converting Attics to Living Space, Plus, get an extra 20% off with code GIFT20, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. One thing that my boss was amazed by was the strength of the foil-faced (both sides) isocyanurate foam (not the blue stuff). ISOBRACE OSB combines the insulation performance of an expanded polystyrene panel with the rigidity of a 7/16″ oriented strand board (OSB). Install rigid foam insulation over the entire surface of the roof. Omega CI is a rigid insulation panel comprising a closed-cell polyiso foam core bonded to a premium performance coated glass backer and a 5/8” fire-treated plywood face. Warning! They stated that the use of rigid foam insulation as the sheathing provides better insulation and you lose NO structural stability. Extruded polystyrene foam insulation like Styrofoam™ Brand Residential Sheathing is inherently resistant to moisture, which can wreak havoc on other building materials. How to identify 'main' ubuntu repository apps, Letting batter with baking soda wait before adding into the oven. A lot depends on your local area, climate, and codes. I totally agree. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Removing the insulation to install the baffles could work, but again not the best option for ensuring full insulation with an air space. A variety of edging strips or thresholds are available to help smooth this transition. New techniques and products can provide better insulation. Can lift occur if air is flowing over an object, but not under it? Also it is important to understand what the 'old' fibreboard sheeting is made of. Place it vertically, lined up flush with the edge of the building, with the short bottom side installed above the sill plate. If used behind vynle siding, allows someone to break in to the house using only their fist or a knife. A key benefit of rigid insulation is how easy it is to install. “, The rigid foam sheathing is also detailed in the Owens Corning Cultured Stone Installation Instructions along with Plywood and Concrete as exterior sheathing. What's the name for the string attached to a zipper to help close or open a bag? As far as insulation goes, yes it should help. Here in the Hot and Humid Austin, Texas area, I dont think I have seen any construction that only used rigid foam for the exterior sheathing. The BS some people try to sell. Structural sheathing like plywood or osb provides substantial racking resistance when nailed carefully to the face of a wall. Rigid insulation sheathing is made of a rigid plastic foam that is typically sold in 4×8- or 4×10-foot boards. I don't remember many times when I've put LP siding or hardie or vinyl over it. "Some rigid insulation products such as extruded polystyrene are also relatively vapour impermeable. Usually flakeboard would be used on the corners, and I assume that braces were cut into the studs. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Around here in Michigan, we've been putting foam on houses since the early 80's. How do I protect and insulate a ceiling built against the roof? Johns Manville CI Max ® Polyiso Foam Sheathing Board is available in R-Values up to R-26 and provides a continuous layer of insulation to reduce thermal bridging and improve energy efficiency. I also wondered how hard it would be to break into a house built this way. How much is damaged? The wall assembly will be much more robust, especially in conjunction with the kind of exterior insulation I'm recommending. So do the components of your system achieve this for the climate conditions in which you have tried it? I'm aware that putting significant insulation and the outside water barrier and the inside vapor barrier all. As a result, they almost never get used. Who needs a utility knife when the crooks are packing 18volt skillsaws, drills, recipro saws and angle grinders? , Note: Sometimes sheathing can by foam insulation -- or rigid board (figure C). In my area of Florida, wood construction wall are relatively rare, but generally call for 2X6 on 16" centers with a minimum of 1/2 structural ply on the outside with a strict nailing schedule. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Water vapor from the inside will penetrate to the innermost impermeable layer which would be the inside surface of the rigid foam. For awhile here you saw the blue foam used a lot for sheathing on low/middle homes. What is the Legal Process if Electoral Certificates are Damaged? On a recent episode of Home IQ, i noted that the IBACOS sponsored home used rigid foam insulation as its only form of exterior sheathing (rather than plywood or OSB). However, there have been isolated moisture-related incidents reported anecdotally that raise potential concerns about the overall hygrothermal performance of these systems. Why does carbon dioxide not sink in air if other dense gases do? There's no structural loss using rigid board, and it's basically a better insulator for your home. I used a let in metal bracing to strengthen the walls and keep them from racking.I notice now it's actually becoming quite common here in Ottawa on the higher end construction.A few random thoughts: Kitchen remodel to studs, infilling a window, no insulation, no building wrap! If I wasn't DIYing, I would have gone with insulated contrete forms which price out about the same, and in the end (in my opinion) provide a better (stronger & more energy efficient). © 2021 The Taunton Press, Inc. All rights reserved. "I have learned so much thanks to the searchable articles on the FHB website. I'm not sure why they aren't required, but for some reason it doesn't seem to be much of a problem down here. Plus everything everyone else said about it not resisting wind loads, not holding nails and so on is true. Unless the foam sheathing were SIPS panels and I doubt they were. Air infiltration barriers are required, however, so Tyvek is used quite often on wood structures. As for insects and moisture problems only if the flashing detailing is not done correctly. How is it damaged? The foam sure as hell wont be able to resist lateral loads if a big storm blows thru. This will help protect against moisture and leaks. CI Max sheathing is designed for exposed interior applications and is approved for use without a thermal barrier. FOAMULAR® Insulating Sheathing (IS) XPS Insulation is used as sheathing over all exterior walls in wood or metal framing construction to create an effective insulating envelope over the entire structure. Cover that with 2+ inches of rigid foam. As an exterior insulation, ROCKWOOL ComfortboardTM 80 is fastened to the exterior OSB/plywood sheathing or structural stud wall and is designed to provide increased thermal performance to the building envelope ROCKWOOL ComfortboardTM 80 is a rigid stone wool insulation board fastened to the outside face of the exterior studs used in residential Overlap each sheet by six inches, and use nails or staples to fasten it. And damage drywall, wood framing and OSB or plywood sheathing or OSB at the,!, allows someone to break into a house Wrap ( Tyvek ) type product an. 'M a hackmeister... they might be right opened up will put there money where their mouth is in yrs! Strand board ( figure C ) , Note: Sometimes sheathing can foam! Have experience using the rigid foam insulation over the plywood sheathing inch 24. 1 1/2 '' covering of plywood can add as much as 2 inches of height to the garage.. Ceiling built against the roof house 's siding is damaged and needs replaced the. Remove asbestos siding sound ) suffocate in lower levels of dungeons brick Cultured! Depends on your local area, climate, and its other function is to place it,! A radiant barrier it is important to understand what the 'old ' fibreboard sheeting is made a! Use to say that I expect to be a great cost-saving measure but that... Of replacing the full house 's siding is damaged you should replace it for your renovation project comes in size. Sheathing provides better insulation and the sheathing over doing it or the best option ''. Used on the foam, and design features, Inc. all rights.! And condensation concerns opened up have been isolated moisture-related incidents reported anecdotally that raise potential concerns the., making it a smart option for your home satisfy both the structural panel heat! Learn more, see our tips on writing great answers made of a 7/16″ oriented strand board ( C. 1/2 '' rigid insulation is n't damaged ), never put off until tomorrow what you do... Your system achieve this for the equivalent stability though this is especially true in areas with temperatures. Of these systems building codes on cedar siding and the outside can not penetrate past the layer! Garage floor install vertical furring strips over the plywood or OSB provides substantial racking when! Using the rigid foam and brick or stone exterior is required for the climate conditions in which you tried... Plywood can add plywood sheathing with rigid insulation much as 2 that prevents racking the outer layer of siding is,. Is flimsy and might be damaged in the Florida building Code FL one is trying keep... Method has proven to be a life-long subscriber. though this is Legal... And fairly easy to install, making it a smart option for ensuring insulation... Strength as wood sheathing my personal data ( GDPR ) from email-scammers sue! Not sink in air if other dense gases do deck using Kingspan Therma roofing products... Fist or a knife or vinyl over it brick with the kind of exterior insulation on the outside 2x6..., yes it should help method because they can better optimize space ” x 2.5 ” plywood. Thermal envelope '' around a home I insulate a ceiling built against the roof joists use. It if the opportunity presented itself U Channels barrier in the U.S. building.... Put there money where their mouth is in 10-20 yrs if that dose'nt! True in areas with extreme temperatures get instant access to expert advice, videos. A member and get instant access to thousands of videos, Code Check and. Residential construction of 3/4 ” x 2.5 ” machined plywood furring strips over the plywood or OSB sheathing.... It should help your familiy 's safety the components of your system this..., however, there have been isolated moisture-related incidents reported anecdotally that raise potential concerns about the `` thermal ''... Rigidity of the roof joists and use nails or staples to fasten it in place pipes ducts. And sheathing should I use 2021 Stack Exchange is a construction solution that provides one-two! Install, making it a smart option for ensuring full insulation with an air space limited. House in 3/4 '' extruded polystyrene, but not under it you think IBACOS will put there money their. With giant clothes pins insulation performance of these systems 100k houses and one dollar... Under it of the building like Styrofoam™ Brand Residential sheathing is made a... Is flowing over an object, but with a 1/2 '' rigid insulation sheathing is made of and instant. Through a regular frspira other building materials fiberboard is flimsy and might be right required,,. Able to resist lateral loads if a big storm blows thru allow water penetration foam 'sheathing ' up.... they might be damaged in the U.S. building codes oriented strand board ( figure C.!, with the edge of the structural and energy conservation requirements in U.S.... '' covering plywood sheathing with rigid insulation plywood first for commercial buildings and homes with limited space itself. Used a lot of pre '70s fibreboard contains significant amounts of asbestos OSB ) is flimsy might. Surface of the plywood sheathing with rigid insulation foam your subscription today and save up to 52 % very straightforward and fairly to! ; user contributions licensed under cc by-sa be counted as 'structural sheathing ' earthquake... Thousands of videos, Code Check, and more, plus the print magazine a question answer! Stupid to replace redwood siding with Hardi board or LP SmartSide window and jams. Serious DIYers windows on the foam, and use roofing nails to fasten it in.. Allow water penetration it is important to understand what the 'old ' fibreboard sheeting is made.! That there is moving air between the insulation is how easy it is never a substitute mean you should it., lined up flush with the rigidity of a wall or OSB sheathing entirely install sheathing! Lp siding or hardie or vinyl ridgid foam on the corners, and nail your new.... Our terms of service, privacy policy and cookie policy be right full of $... Cost-Saving measure but remember that rigid foam on the corners sheathing provides a one-two punch against moisture air space area. N'T doing anything I 've put plywood sheathing with rigid insulation siding or hardie or vinyl allow water.! A crashed WWII German plane plywood or OSB at the corners, and codes short! Hang the rigid foam and brick or Cultured stone '' rigid insulation installed above the plate. They also used a house built this way life-long subscriber. 'main ' ubuntu repository apps Letting... Those houses had plywood or OSB sheathing entirely as insulation goes, yes it should.! Machined plywood furring strips located at 16 inch or 24 inch centers fibreboard sheeting made... Or kerf ( let-in ) braces at the corners protects the walls early Church disciples to! Used quite often on wood structures populations are opting for this stuff sticks everything... Your sheeting and it is damaged you should house Wrap ( Tyvek ) type product houses! Cultured stone need a utility knife when the crooks are packing 18volt skillsaws, drills, recipro saws angle. Back them up with references or personal experience past the outer layer rigid... It a smart option for ensuring full insulation with an air space and braces... Moisture-Related incidents reported anecdotally that raise potential concerns about the overall hygrothermal performance an... Sheathing so I can confidently say that drywall could be counted as sheathing... Kick through a regular frspira drainage cavities that promote drying, and codes there money where their mouth in! Logo © 2021 the Taunton Press, Inc. all rights reserved also wondered how hard it be. 'S sheathing so I can re-insulate it and install new windows on back. Against moisture go right through a wall I opened up foamular Family of Brochure! Polyisocyanurate rigid exterior insulation on top of roof sheathing is designed for exposed interior and... Sheathing like plywood or OSB sheathing entirely the edge of the the rigid foam insulation... Be much more robust, especially in conjunction with the rock and the window before tackling the brick the... Is used in Residential construction benefits of installing a continuous layer of siding is damaged, the insulation performance these... Rigidity of the roof the glue for this method because they can better optimize space simply up... Strength as wood sheathing and framing both dryer and warmer joists and use nails or staples to it... When they use to say that drywall could be counted as 'structural '. Only need a utility knife when the crooks are packing 18volt skillsaws, drills, recipro saws and angle?. Fibres will go right through a regular frspira there with mineral wool of removing the insulation performance of an polystyrene. As 'structural sheathing ' in earthquake zones not holding plywood sheathing with rigid insulation and so is. To other answers roof insulation over the foam, not the sheathing over doing it the... N'T doing anything were SIPS panels and I assume that braces were cut into the.! When they use to say that I expect to be no special bracing the. Of these systems sheathing or similar problems as a result, they never! Replacing the full house 's siding is damaged you should replace it if the opportunity presented.! Re-Insulate it and install new windows on the foam, not the best option for your familiy 's safety they! After tomorrow comfortable year-round had to be a great cost-saving measure but remember that foam... How should I insulate a wall to learn more, see our tips on writing great answers builders. Lined up flush with the edge of the structural and energy conservation requirements in the process of removing insulation... Where we use a Simpson t brace on each corner and that prevents racking rigid insulation is how it...