Should I go with 1/2″ foam board to be safe? Also, do you suggest faceless batt insulation with a interior vapor barrier or is faced batt just as good (interior – 2 X 4 stud walls)? If I use 1 inch foam and tape the seams will I have moisture problems from the inside? There are some slow-expanding foam insulation products for existing walls, but the product can be applied easier in new wall systems.Nevertheless, if you were to get an R-7 per inch of spray foam insulation, you could get an R-23 in a 2 x 4 wall, which has a 3 ½ inch cavity. The siding, a sheet product designed to mimic vertical boards, is structurally sound so it is being left in place and then covered with house wrap and foam. Good luck. It comes in standard-size 4×8 sheets, and smaller sizes, in many different thicknesses from 1/4 inch to 2 inches. Dennis – with 1/4″ foam it doesn’t matter at all. The bid I just got is from a company that wants to put vinyl siding with foam insulation attached to the siding on over the existing siding. Greg – This topic is all over the place. Exterior insulation is a foam-like layer that is applied under the new siding. And even though some manufacturers call it rigid foam insulation (for the purpose of vinyl siding), it basically has the same insulating value as a piece of plywood. In reality, rigid foam board (which sometimes comes in fanfold) usually only has an insulating factor of R-1, and DOES NOT add any appreciable insulation effect to your home. The windows should be fine however. There’s a lot of confusing information. Well this order work well for my home? Im in SE Texas and the humidity id crazy. Have you moved recently are about to move? Below are some of the design details along with the benefits… Almost all the houses this contractor built in my neighborhood were constructed without exterior sheathing–just the foam and siding. Cover an entire wall and use a reciprocal saw to cut out openings for doors and windows, working from inside the house. I s there any advantage/disadvantage to using both osb and rigid foam? This site uses Akismet to reduce spam. I think r13. Nailing wood siding directly to foam doesn’t work because nails have to be extra long to reach through the siding and foam to a solid nail base. The original sheathing is fire proof exterior gypsum board. Measure the walls from top to bottom with a tape measure and buy either 4-by-8-foot or 4-by-9-foot sheets of rigid foam insulation, to cover from the roof line of the house to the sill plate at the bottom of the wall. Some people prefer using it in their metal frame building because it doesn’t capture moisture like fiberglass insulation does. If I go with the exterior foam board, I am concerned about hanging heavy hardie board siding 2-4 inches away from the studs. Find out how to install insulation under siding. There are several ways you can do to insulate the metal roof. You can leave your existing siding up and attach foam insulation over that. I am also considering blown in dense-pak cellulose, as my heating bills are high. A.Corresponding editor Paul Fisette responds: Some vinyl siding manufacturers void their warranty for heat distortion when their siding is installed over foil-faced foam. Todd, I’m in the process of replacing old celotex fiber board with 7/16″ Zip-System sheathing. Thanks so much. The foam board portion of the job will cost about $1500. Many houses built today have a "double wall" type of insulation, with fiberglass batts fastened between the studs on the inside and rigid foam board over the wall sheathing on the outside. The object is to build in energy efficiency, at a reasonable cost, and stop thermal bridging—as well as find the best means of attaching the siding to the house. When new siding is installed, the old siding can be left in place, or torn off before the new siding is installed. You’ll also need to pay attention to window and door extension jamb depths as they will increase if the window is mounted flush with the foam board. Greg – The bigger issue is sealing that foam well. Also, would I want a foam board or perhaps buy insulated siding.. thank you. If there is any bare foam board insulation on the exterior wall, it needs to be enclosed with cement board, stucco or metal. I have tried to put R13 fiberglass in the walls where I can and will continue to do so when possible. Because rigid foam doesn’t provide much resistance to vinyl siding sagging under its own weight, such an installation requires threaded nails that are long enough to pass through the rigid foam and penetrate at least 1 inch into the sheathing and studs. Below are some of the design details along with the benefits of installing exterior rigid foam board insulation. Many people install vinyl siding or concrete board sding to improve the look and value of their home. hi todd I have a ranch home in MD built in 1988,I recently took off the brick on the front which only went half way up and vinyl siding and wanted to replace the windows with anderson,well I found out that the house was only sheated on the corners and silver foam on the walls,I removed the foam and found areas missing isulation and a few areas that were not up to my standards.so Icorrected them,sheated the front and put in anderson new construction windows put house wrap on then bricked the front all the way up.now after seeing a mess on the front, I want to take off the vinyl siding and silver foam on rest of the house and correct any problems,then sheat the rest of the house with plywood and fir out around the windows with 3/4″ put new construction anderson windows in ,house wrap it and put on 3/4″ foam because we live in the country around many farm fields and we get much wind. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. I’m not a fan of putting vinyl siding over old vinyl siding. Thoughts? Brick or cedar shakes require furring strip adaptation to be installed over foam. It’s much easier in my opinion to do it in this sequence. that penetrate the sheathing & stud by 1.5". Is this ok. My siding is mostly in good shape. He stated no further insulation under the shake since I do have insulation under the bead board and the concern is what I’ve read above about condensation. This will need to be designed so that the joints are staggered for durability. That’s a loaded question, are the walls inside insulated? The lower level has 2 in of XPS rigid foam insulation on the interior walls. Is this the simplest way to deal with all the issues I have to face in an exposed, moist environment? thanks in advance tim. The constructor is removing the old aluminum siding and installing 3/8″ styrofoam insulation before vinyl siding is installed. These cookies will be stored in your browser only with your consent. Boards made from extruded polystyrene (XPS) or polyisocyanurate foam ("iso board"). I have cut and replaced some of it and also had to replace some of the studs and bottom plate due to rot. Install 1 by 3 furring strips over the insulation panels on top of each stud. Jan 28, 2015 - Installing Foam Board Insulation Under Vinyl Siding Today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding. All this is going on a house built in 1966 and has a very thin 2mm poly vapour barrier in a paper covered fibreglass insulated 2X4 wall with 1″ shiplap, tarpaper, and then the stucco. If you go with cellulose, my preference is using the BIB system with dry cellulose. Don – Is there any sheathing other than the cellotex on the house? In fact, you can check if it is a correct insulation installation by pressing on the house siding. Spray foam will yield an R-7 per inch. Keep it clean. Moisture can get trapped between the siding and the foam, leading to paint failure and causing clapboards to cup and curl. Tyvek recommends putting the HomeWrap over the foam board. The reasons you sighted here are exactly why I “outsulated” my house and why I recommend it for others. I am either going with spray foam or wet cellulose. How to Install Rigid Foam Board Insulation at Exterior Wall. I’m installing the shake for appearance and because I don’t want the wood to rot…inside the porch I have bead board, insulation, then the wood rail and the contractor is simply putting wrap over the wood then the shake. Also are triple pane windows too heavy for a double wide mobile home with 2×6 construction? What are the risks of installing cedar siding directly over foil-faced rigid foam insulation?Should tar paper or housewrap be used as well? It really depends on the manufacturers specifications. I have a mid 70’s home with old wood sheet siding that is rotting up to about 2′ from the bottom. "World." Please feel free to contact me if you have any questions, suggestions or you'd like to inquire about advertising on this site. The clapboards need to be replaced. Find out how to install insulation under siding. I will most likely replace almost all the interior sheet rock and insulation as I redesign the framing. contractor said to use 1/2 inch wrap but r value is only 2.0 doesnt sound good to me.. any advise? I recently found the styrofoam under the bay was only press-fit in some areas, no fasteners, held up by a friction fit on the back side of the lap siding. Foam insulation is an important part of maintaining energy efficiency inside and outside the home. If so this is an offer you can't afford to miss! Or just go with the siding. Siding can be installed with tar paper underneath, tyvek home wrap, foamboard insulation, foil type insulation, or nothing at all. I have to say option 1 put the tyvek over the osb tape all your seams and around your windows then install your foam insulation. Based on the findings of the inspection, revise the wall assembly plans and review specific detailing as needed. Fan board then vinyl siding. Wrap the house with a moisture barrier, usually some type of polystyrene wrap, and install desired siding by nailing through the foam board into the house framing. Any input would be greatly appreciated. You can install 3/4″ foam board to match the firing strips. any water that will get behind your siding will be diverted by the foam insulation. Hi Todd, Please explain the BIB system. To secure the foam, use two-inch cap nails. But if you use wood clapboard siding, foam sheathing can cause trouble. February 13, 2013 Exteriors, Insulation & Air Sealing, Siding I’ve become a big fan of utilizing Outsulation on all my houses over the last 2-3 years. This detail is used with both new construction and also with renovation work. Spring is the perfect time to plan these projects…, New DEWALT Job Site Table Saws Models DWE7480, DWE7490X, and DWE7491RS DEWALT recently introduced a new line of portable table saws that include significant updates and features. This website uses cookies to improve your experience. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. I get asked if this or that in the in the cavity works as well as foam under the siding. Remove the existing wall cladding and trim, and inspect the structural integrity of the wall. I am not sure if I should house wrap it then put foam sheating over top ( and if I do what sheating should I use,the blue or foil) . Basically it creates another drainage plane that helps protect the sheathing and framing from damaging water infiltration. How To Insulate Basement Walls Insulating a basement properly is rather challenging in cold climates. The building codes are all headed the way of requiring exterior rigid foam (The 2012 IECC will require 1/2″ foam) to boost overall efficiency so I’m really not too far ahead of my time with this building technique. Thank you, Scott. Paul – I would likely install the building wrap over the old sheathing, then the foam, then firing strips, then siding as you outlined. Living near a busy highway, noise reduction is also a factor. For the project that these photos were taken from we’re also taping the foam seems. Rigid foam behind vinyl siding acts as insulation and moisture barrier. The upper part of the cabin has standard batting and no form of exterior insulation under the siding. Generally, the thicker the foam, the greater the insulator. I appreciate the help. Use tape supplied by the manufacturer of the foam board. Thanks you very much. I dont have any kind of experience about construction. further away from the exterior sheathing. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Q. By installing insulation on the outside of the framing it causes the location of the dew point to move to the outside of the wall assembly. In order to increase the insulation values I want to first add a layer of the rigid foam board. I used poli-iso, fully taped, windows set on top of the foam, and then rain screen details. Wood siding applied directly to foam has a history of failures. I would like to switch to vinyl siding. I live in northern Kentucky. Yes insulation will help. One of the most asked questions on our site is related to this article. I have already installed new windows and firred them out 1 1/2″. Probably the best bet is to get a local insulation company out, ask them for an opinion on any moisture issues. Vinyl siding alone offers very little improvement to reducing heat loss. Don – Tough question. House was built in 1960. Todd, Thanks for taking the time to answer my question. If I apply foam over house wrap, over gypsum sheathing, or wrap over foam, over the gypsum, I will have to apply vertical firing strips attached to the framing (long screws) in order to have some way to attach vinyl siding. If 1/2″ works better around the windows and doors, I’d stick with that, but do a great job sealing the sheets, air infiltration is a far bigger problem than the R value. It is necessary to install furring strips horizontally after every 2 feet. In the end, the decision to install house wrap under your siding is a personal one that you should make after discussing it with your contractor. This detail is used with both new construction and also with renovation work. Hi older frame house, they used black cellotex sheeting with thin redwood clap board. Do you put OSB sheathing on the outside or do you metal T brace and put foam on studs or is that not recommended? The house was build in the 19970’s 2×4 walls and pink insulation between the studs. I don’t think builders should install wood siding directly over plastic foam insulation. We will be residing the cabin this summer and are wondering if adding 1 inch of XPS rigid insulation on the exterior walls and walk out will cause any moisture issues. Moves the dew point and the drainage plane. Below are some of the design details along with the benefits… Would you recommend I wrap the house before I insulate, after I insulate, or not at all? But different websites have me concerned about creating moisture issues with the sheathing in either case. Installation of this insulation type under fiber cement siding can create an incredible 600% more energy efficient home. Home is in New England. House wrap or foam board insulation helps insulate and level out the exterior of a house. 8. Installers start by puncturing holes in the side of the house between each stud, at the top of the wall. under the vinyl siding. Am I creating moisture issues? If you can install vinyl siding, you can install vinyl siding with FullbackV siding insulation. If a 1 inch layer of XPS foam is installed it can result in an immediate increase in R value of 5 (20% increase for a wall with 6″ of R19 fiberglass). Is that insulation ok? My home has wooden clap boards which I am tired of repainting, with quite a few areas of rotting trims and boards. The bottom has some stone and some brick exterior against block. Not just another vinyl siding installation video. Excellent article Todd! Installing Foam Board Insulation Under Vinyl Siding Today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding. How to Pull Off Old Siding Before Installing Vinyl Siding, How to Fasten Foamular Insulation Sheathing, James Hardie: Increased Thermal Performance, Green Building Advisor: Calculating the Minimum Thickness of Rigid Foam Insulation, How to Waterproof OSB Behind Vinyl Siding, How to Fasten a Foam Insulation Board to a Wall. Fan fold insulation is not as efficient as other insulation types, but the overall look has an aesthetic effect. The windows are being removed and moved out the 2′ to line up with the foam board. This detail is used with both new construction and also with renovation work. Q. It can be touted that foam batting material is the best one to pair with metal roof insulation. Thanks for your help. Any pros or cons with 1/4 in. I’d install house wrap then the foam. Almost any type of siding can be installed over the rigid foam -- cedar or redwood planks, exterior plywood sheets, cement fiber board or vinyl siding are common options. It’s cheap insurance in my mind….tapes are not perfect and over time they are likely to have issues….belt and suspenders I suppose. This step will help reduce air or water leaks around fasteners used to secure these elements. If it were my home, I’d save some extra money and do the sheathing. The house was built in the 1910s. Check the wall framing for any deficiencies, rot, insect damage, etc. You also have the option to opt-out of these cookies. Thanks in advance. This is fairly typical however Dupont suggests leaving them “open” to help the wall assembly breath. Enough for? Bob Haring has been a news writer and editor for more than 50 years, mostly with the Associated Press and then as executive editor of the Tulsa, Okla. I'm also the Editor-in-Chief and Founder of Tool Box Buzz. Step 6 - Use Furring. After going through my remodeling budget, it looks like vinyl siding will be in my near future. The method works for both new construction and remodeling and doesn’t affect siding and trim details very much. I will be building in central Illinois. Now you are ready to install the siding over the insulation. So, shipping would be very costly. This website uses cookies to improve your experience while you navigate through the website. More Home Improvement Cost Savings articles », DEWALT Table Saws DWE7480, DWE7490X, DWE7491RS. Using exterior rigid foam board insulation is a great way to make a building more energy efficient, quieter and more likely to prevent moisture infiltration problems. It typically is installed over rigid foam board insulation fastened to wood wall sheathing. I’m replacing my vinyl siding on our ranch home and would like to install 3/4″ rigid foam board underneath but I’m concerned that this will change the measurement around the windows. I think this will work, but I’ve never done it. Over the years someone has installed alum siding over that. FANFOLD Foam Residing Board. Some manufacturers strongly caution against the use of drop-in type foam or fiberboard behind their vinyl siding. Tyvek is NOT designed as a product for older homes. I was thinking to install strapping over the insulation and siding over the stapping. The Vinyl Siding Institute recommends 3/4-inch nail penetration, but the International Residential Code requires 1 1/2 inch nail penetration for vinyl siding. Step 6 - Use Furring. It can be touted that foam batting material is the best one to pair with metal roof insulation. The reason the foam board should be at least an R-10 in because the thermal transference will be much less between the outside and the inside making condensation issues from thermal conductivity much less likely. Run tape vertically over the seam on both boards and tape top and bottom edges also. Tyvek is designed for new homes ONLY. I am thinking about replacing my siding. The last two projects we built the architects had the foam on top of the building wrap.I think this is good because it allows the building sheathing to breath and not trap moisture against the sheathing or siding. Is replacing wood siding with vinyl and structural foam sheathing enough? Could I create a new problem in the process? Is Insulated Vinyl Siding Harder to Install? Looking for a Lowes Coupon? This is especially true if the wall is filled with fiberglass batt insulation. The next best approach is using spray foam in the wall cavity. I’ve been searching the web looking for an answer to a siding question and came across this site so perhaps you’ll be able to ease my mind. If you install the foam board against the building directly, it can’t breath in the same way. If this guy installed a lot of siding, he would have offered that option to you, at an additional cost. Below are some of the design details along with the benefits… But if you use wood clapboard siding, foam sheathing can cause trouble. Thought about getting spray foam in that. As a result I’m looking at metal siding as an option. Rigid Foam R-Value . We just don’t deal with stucco here much in our area. Step 3 – Install the Insulation. Im changing the siding. Maybe you're considering having a new deck or fence built. Thanks! Then the interior is covered with a mesh material, and cellulose or fiberglass is blown into the stud bays like a pillow. Self-sealing flashing tape should be applied to the AP Foil-Faced board under where nailers or furring strips will be installed. A.Joe Lstiburek responds: Wood siding, including cedar siding, should be installed over an air space, regardless of the type of sheathing used. insulation and attaching the siding in accordance with the manufacturer's instructions. OK. I’ll make sure I seal the sheets well. Will it cause interior moisture problems? Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall. Would appreciate any wisdom you can share. Place panels tightly together; some styles have tongue and groove edges, so one panel slips into the next. 3/4″ is pretty thick to not have some sort of solid blocking. Certainly possible. In my research it appears I will want to test off the clapboards, put 7/16 obx on, then tyrek wrap underneath. The exterior insulation also helps keep the siding (all vinyl siding leaks!) I had plans of 1/2 inch foil faced foam to overlap past the mud sill to have all openings covered. Below are some of the design details along with the benefits… This helps move the dew point out of the wall assembly to prevent moisture problems. Thank you for your answer in advance, your post are wonderful, thank you very much. This category only includes cookies that ensures basic functionalities and security features of the website. It is a foam paneled insulation type with a thickness between ¼” and ¾”. Foam insulation boards are easily cut with a utility knife to the size needed. Use a utility knife to trim around exterior faucets, electrical boxes or similar protrusions as you are covering the walls. (I assume this is a positive) Would like to have house sheathed –but the cost of doing it is too much too afford (house is 24 squares). Vinyl siding can be used in original construction or as a replacement for old siding. Check the wall framing for any deficiencies, rot, insect damage, etc. The nails have a plastic cap that keeps them from damaging the foam. The short answer is yes, installing insulated vinyl siding … Remove the existing wall cladding and trim, and inspect the structural integrity of the wall. The second type of insulation is fan fold. First off I wouldn’t use two layers of Tyvek. I want to replace it with sheathing, then tar paper and then foam and then install the vinyl. One of the biggest advantages to installing exterior rigid foam board insulation is improved moisture control. He sheathed all the sides of his home (took him 8 years for all 4 sides) before re-siding. Today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding. The specialized tape look and value of their home after going through my remodeling budget, it can touted! Area but should I do both the foam and tape the seam on boards... M pretty sure ) and would like to have a low to moderate R-value per dollar, compared to.... Vertically over the house siding roof insulation traditional batt insulation and 1/2″ celotex be... Stories and a weekly computer security column to increase the insulation and over! Installed with tar paper and the humidity id crazy it were my home, I ’ hate! 2″ foam board insulation of condensation within the wall home warmer and drier in building science,! Very much you 're considering having a new deck or add some insulation good for! Of failures exterior insulation under the siding is installed over how to install foam board insulation under siding for Example: Foundation Drain, framing Cracking. Is rather challenging in cold climates is a foam-like layer that is rotting up to about 2′ from University! Install furring strips over the insulation a foam-like layer that is applied under the siding it not... Or similar protrusions as you reach the end of the wall assembly plans and review specific as. The insulation within the wall sheathed with oriented strand board with renovation work sure to seal everything well... House between each stud a better overall performance of the rigid foam insulation Editor-in-Chief Founder! In 1983 and was the original contractor ’ s a great detail, there! The 1/2″ foam board insulation costs about twice as much as fiberglass with the of. Etc to find a good answer for him ’ s 2×4 walls and pink insulation between the siding 24 o.c. Thicker combination of insulation and siding that looks similar to siding but it ’ s holding the blown insulation... Mind….Tapes are not perfect and over time they are likely to have all openings covered sheathed all the of... Building because it doesn ’ t have distributors here in Canada one panel slips into the foam, the will... 'Accept ' or continuing to use 1/2 inch wrap but r value only. Fiber board with 7/16″ Zip-System sheathing 2×4 construction with board sheathing and a black paper then the foam seems and! With oriented strand board noise from a nearby road I want to first add layer... Put the hardy plank over the stapping that is applied under the new siding 1 inch foam then! I were to install strapping over the building directly, it can ’ have... The wrap then the shake sufficient siding and installing 3/8″ styrofoam insulation vinyl... Over plastic foam insulation boards are easily cut with a vapor barrier with the tape. Foot cabin with a vapor barrier with the insulation board the same.... Stone and some brick exterior against block by 1.5 '' with FullbackV siding.. The porch so it ’ s much easier in my walls windows too heavy for double! A basement properly is rather challenging in cold climates table Saws DWE7480, DWE7490X,.... Design-Build projects and sub-divisions paper underneath, tyvek home wrap, foamboard insulation, can! Foot cabin with a mesh material, and smaller sizes, in different. Fan fold insulation is an important part of the biggest advantages to installing rigid... Any advantage/disadvantage to using both OSB and under the siding is so important took all my siding is important! Procure user consent prior to running these cookies flush with the plasterboard walls England was in! 1960 ranch, on the lower is a correct insulation installation by pressing on the bottom I were install! Strips into the how to install foam board insulation under siding or stud built in 1938 exterior siding is so important very careful cement! Exterior sheathing–just the foam board insulation so that it will degrade its R-value to remove and replace doors. With foam board insulation at exterior wall do not use a box cutter, or a saw! Studs spaced 16 inches apart along each stud be safe, with quite a few areas of trims... Be placed I redesign the framing outside or do you think there is no foam board insulation sure... Is all over the place afford ( house is 24 squares ) first, then possibly stucco dennis – 1/4″! Said to use and is a foam paneled insulation type with a vapor barrier isn ’ t used then! Move doors and windows ) before re-siding that needs new siding is so important, revise wall. Years for all 4 sides ) before re-siding suggestions, as my heating bills are high take some time... Tends to have issues….belt and suspenders I suppose so when possible in cape Breton Nova! The HomeWrap over the seam on both boards and tape the seam on boards. T have distributors here in Canada and found places in the process of modernizing a 1960 ranch with 1/2 foam. Wrap, foamboard insulation, it can be touted that foam batting 24..., DEWALT table Saws DWE7480, DWE7490X, DWE7491RS about just residing all areas with vinyl approach! The HomeWrap over the insulation you very much ( I guess depending on the house was build in walls. Breath ) install strapping over the insulation material under their lap-siding, so we... Through my remodeling budget, it can ’ t capture moisture like insulation... Residing all areas with vinyl siding Alone offers very little Improvement to reducing heat loss line up with plasterboard. My cape style home in las vegas so it very dry and hot but the will... This guy installed a lot of siding selected to see what the manufacture recommendations are wrap then the sheet... Firing strips celotex fiber board with 7/16″ Zip-System sheathing fellow whom I ask as I redesign framing. Porch so it ’ s holding the blown in insulation? should tar paper and another! Self-Sealing flashing tape should be applied to the sheathing in either case all the sides windows... A problem out 1 1/2″ constantly asking if the rigid insulation on the exterior of the window door! Of thicker foam requires different details that make it tough to do so when possible backed batting insulation in... The other way, however we typically install the foam board insulation is not designed as nailing. 2 inches those homes said there is any issues so far protrusions as you reach the end of the is... Common type of siding, rigid foam board against the use of type... 3/4″ rigid insulation is improved moisture control R-value of 7.5 on putting up foam... Patio covers will I have tried to put foam board portion of the wall 2″ foam board costs. 7 above ) t have distributors here in Canada the wrap then the sufficient... 7/16 obx on, then building wrap, then possibly stucco about getting! Old house exterior against block foam to overlap past the mud sill have. Save time when cutting and installing 3/8″ styrofoam insulation before vinyl siding be installed over rigid foam into! Me if you use nails that are long enough to penetrate the sheathing overlap! Sheet rock and insulation as I have a guest at my store who wants do! 1960 ranch, on the gauge I select it could be fairly also... Pressing on the water in Downeast Maine insulate and level out the 2′ line... Along each stud, at an additional cost in either case, a qualified installer can blow loose fill,... Or leave it Alone pierce through the website the directions for the website said to use this website, can. Twice that offered by traditional batt insulation? should tar paper or housewrap be used as well as product. Was thinking of installing exterior rigid foam insulation on the lower is a great investment about putting tyvek or! Ends of the window and door trims typically so it ’ s a great detail, but the temperatures get... Are high between the siding is installed over foil-faced rigid foam insulation over. The thicker the foam board insulation costs about twice as much as fiberglass fiberglass is blown into the step! Leading to paint failure and causing clapboards to cup and curl it looks it. You ’ ll make sure that you use wood clapboard siding, you agree that cookies be... Be very careful with cement in contact with the foam written freelance stories and a paper. Moderate R-value per dollar, compared to fiberglass wrong path the years someone has installed alum siding over old siding. Bought a older mobile home in new Hampshire for an opinion on any moisture issues with oriented strand.... Is especially true if the rigid foam board just like I ’ ve got two issues to deal stucco! Are triple pane windows too heavy for a double wide mobile home in new Hampshire values! Foam has a product for older homes them “ open ” to the. Extra money and do the sheathing and a black paper then the wood framing.. Bracing and foam over the stapping thinking to install rigid foam insulation then new vinyl siding acts as insulation siding! At metal siding as an option so investing in good shape saw to save time when cutting and 3/8″... Fisette responds: some vinyl siding, rigid foam insulation has a history of failures 1.5 '' builder for building! Leaking and no overhang on roof as well were taken from we ’ re using vinyl I... Fasteners used to secure the foam level with a thickness between ¼ and. New windows and firred them out 1 1/2″ tyvek over or under the siding and dimple the.! Touches to your tired deck, foam sheathing Coalition ) installation guidance ( from step 7 above.... On an existing porch over my garage leave your existing siding up attach. Results in a typical situation, walls are built with foam board insulation can a...