Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. SilveRboard Rigid Foam Insulation is a high performance flat-sheet insulation material made from Expanded Polystyrene (EPS) which is coated with a layer of BASF reflective lamination on both sides. We just wrapped a new house here in Portland, OR, with 1" of unfaced xps. The … Your vapor barrier should be with your collection of housewrap, and rigid foam in this wall construction. Find Foam Board Insulation at lowest price guarantee. The science I read suggests that this is close to optimal construction for our marine climate. An Irish manufacturer offers a fourth and more recently developed type, phenolic foam. More information, free (videos, answers to questions) upon request by email: [email protected], Good article!EPS and XPS are all produced by polystyrene, polystyrene can be applied to many products. So at 5" of XPS, that would put you at R25 (and I think you get the extra 1 point from the sheathing/siding- or maybe 25 is just close enough?). Silverboard SB35 is a high density white EPS core -R5 per inch . Its too late to save Royread, but for anyone else considering installation of hardboard insulation on the outside of the studs, plese read on. Check with your local building office first. Divide your temperature difference by your Rs and plot where 32 deg. Used in this way, the foam lowers the loss of energy through framing members, a phenomenon called thermal bridging, and increases the overall R-value of the roof or wall assembly. SilveRboard 24 in. x 48 in. Because applying these products as sheathing creates an exterior vapor barrier, they never should be used with an interior vapor barrier. Prodex Total 5M Plus - R17. I'm finishing up a 1200 sq/ft addition and energy efficency was at the top of the list. Roll Sizes . For transition was going to use rigid foam between rafters, over top of the wall and sealed to the Silverboard… 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. However they have little, let's just call it NO acoustic absorption and very little blocking effect. Detailing Walls With Rigid Foam – Builder Steve DeMetrick shares construction and design details for efficient and trouble-free installation of exterior foam sheathing. ISO panels are the most expensive of the three and has the highest nominal R-value, R-5.7 to R-6. I have 2x10 rafters. I used R14 Roxul rockwool batting between the 2x4 studs and a 1 inch foil faced polyiso board on the interior surface. I have a question. It is often used as a layer of continuous insulation on exterior walls and in the roof. Win - win. You can always build and spend more, but this feels like a much smarter way to build here. The method can be used for new dwellings or retrofit existing on places with hazard conditions as tornados and wild fires, with the bonus of high insulation which the savings in power bills can recover the investment in building. If you are concerned about the environmental impact of the building materials that you use, remember that the blowing agent used to make XPS has a very high global warming potential. Cons: R-value varies based on type of rigid foam. Rigid foam insulation is usually a qualified vapor barrier. More permeable ISO panels are faced with fiberglass and can be used without creating a vapor barrier. It’s also considered semipermeable to water vapor, so it does not create a vapor barrier. for pricing and … After reading Rick Arnold's article about ios panels, which I used, I checked with a couple of insulation mafg. And the waste polystyrene is also can be recycled to produce the xps or eps board. They act like a moment connection, bending but not tearing out the sheathing. Thicker, faced XPS is stronger and can have a lower perm rating, but it is still considered a vapor retarder, not a vapor barrier. EPS is suitable for ground contact and can be treated to resist insects. In the end I would have the foil facing the air gap for ventilation on the outside and I would also have foil facing the conditioned space on the inside. Also, remember there are other options for continuous exterior insulation, including mineral wool and fiberboard insulation, neither one of which is comprised of petrochemicals. Im guessing better than the average rigid foam … lands. I would like to add to what he says. "I have learned so much thanks to the searchable articles on the FHB website. Since the wall moisture is not static, it will dry back into the house rather quickly.Where you can also control it. Some insulation manufacturers have been sending their sales people around pimping this system based on a study in Alaska where they used 5" of hardboard on the outside of the studs and in an area where most of the precipitation falls in solid rather than liquid form. There have been many REMOTE walls constructed here, and I have not seen or heard of their failures when the theory has been properly applied. More time-consuming installation than spray foam … x 48 in. Here is our website: http://www.intcorecycling.com/GREENMAX-EPS-Styrofoam-Recycling-Machines.html. And even though some manufacturers call it rigid foam … When applied as sheathing, EPS should be used over housewrap. EPS insulation is used in the construction of buildings to insulate roofs, walls, floors or foundations. Most EPS is unfaced, which means it is fragile. I am finishing a third floor of a two and a half story house. I just want to know how or what I can use to cover the panels with. SilveRboard | Amvic Building System and the price is low. x 1 in. All seams were taped with foil tape so the vapor barrier was intact. I was going to double up the polyiso board for a total of eight inches. Remember not to put the vapor barrier at the drywall. Easily recognized by its blue, green, or pink color, XPS falls in the middle of the three types of rigid-foam insulation in both cost and R-value (about R-5 per inch). The study in AK with REMOTE walls (insulation/vapor barrier on the outside) was based in the hypothesis that if there were nearly double the R value in the outside of the wall creating an exterior vapor barrier, the dew point would occur somewhere in the layers of foam and therefore prevent the condensing of moisture with in the first third of the wall ( the interior ). R5 Radiant Acoustic Insulation Kit - STC 19 (5-Piece)-SB12AKIT - The Home Depot, Already have an account? It is often used as a layer of continuous insulation on exterior walls and in the roof. Rigid-foam insulation packs a lot of R-value into a relatively thin package. Take a look at the article Six Proven Ways to Build Energy-Smart Walls if you want to explore your options. Interior sheathing was 1/2" G1S fir ply. You will find that in the PNW 1" or 2" of exterior insulation is all you need to force the freezing point into the rigid foam. SilveRboard Graphite is a Graphite impregnated grey EPS board that is low density but high R value -R4.5per inch SilveRboard … Foam is cute but not an effective use of money compared to rigid fiberglass or rockwool. For this type … The REMOTE walls have been tested in this harsh environment and have been reported to perform very well. or as high as R-8 per in. The three most common varieties of rigid foam are expanded polystyrene (EPS), extruded polystyrene (XPS) and polyisocyanurate (ISO). This wall covering must have a minimum fire rating to protect the … To make matters worse, there so far, is not a good solution to the problem of sagging fasteners which are likey to allow movement in the siding and open up gaps which can add further water intrusion into the system which will be trapped behind the hardboard product. Interested in learning more about the numerous applications of Expanded Polystyrene (EPS) Foams in the construction industry, check out the following link: http://aecdai.ly/8i. Rigid-foam insulation packs a lot of R-value into a relatively thin package. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. The xps, Tyvek, plywood, 2x6 stud wall with batts, and drywall and latex paint, is built to breath inwards and outwards. If you plan on placing it in contact with the ground, make sure it’s rated for that use. I use 14 inches EPS with has for one pound density an R value of 4, 14x4=56. It is only 2mil thick and I don't see how it works, time will tell. XPS comes unfaced or with a number of different plastic facings. 3 Benefits of Rigid Foam Sheathing. New White Prodex Total 5M Plus: R15.3. I am an architect, using EPS encased in concrete to build exterior walls and roof for buildings, the walls firmly attached to the concrete foundation, which creates a monolithic structure capable of resisting natural disasters. SilveRboard R-5 1.125-in x 4-ft x 22-ft SilveRboard graphite Faced Polystyrene Garage Door Foam Board Insulation Item # 2589417 Model # SBGXS1125KIT SilveRboard graphite XS is a high performance, non-structural, rigid … The basic types of foam board insulation include: polystyrene, polyurethane or polyisocyanurate. It can be as low as R-3.8 per in. Get home building tips, offers, and expert advice in your inbox. Those and PUR insulations are thermally extremely efficient. South East Alaska has a particular problem with not only high amounts of rainfall almost year round, but also winds driving it sideways allowing it to penetrate siding on a regular basis. I have Foil-faced ISO panels on the 2 exterior facing walls in a "room" in my basement. As insulators, pink and blue boards perform … The EPS in the concrete has not voids, which makes the insulation very effective. I can confidently say that I expect to be a life-long subscriber." The idea makes sense, if it’s done correctly. • GPS is a unique material used, in its final form, as ‘rigid thermal insulation’ in the construction industry. The obvious upside is the thermal insulation gain. More effective insulation With R-values ranging from 3.6 to 8.0, rigid foam sheathing has much better insulation per inch than other materials (i.e. In choosing which type of foam to use, consider its location, R-value, and other performance attributes. Unfaced 1-in.-thick XPS has a perm rating of around 1, making it semipermeable. I wondered the same about the sag problem with the fasteners but have not heard any first or even second hand stories about that. Crawl Space Ventilation . If you’re still in the planning stage of your project, be aware that exterior foam insulation isn’t the only way to build an energy efficient home. Any questions or concerns would be much appreciated. The purpose of the vapor barrier on the inside of the insulation is to keep water vapor from inside the living space from traveling through the sheet rock and condensing inside the insulation in the wall cavity when it gets close enough to the outside wall for the temperature to reach the dew point. Find My Store. Compare; Multiple Options. What i wound up also using was that breathable vapor barrier that Certinteed sells. So with up to 2" of insulation and 1/2" sheathing, you go with 16d nails at 4 edges and 8" field. Item #2544466. 5mm (0.2") closed cell polyethylene foam covered on both sides with reflective reinforced foil facing. It also is the least expensive. Just don't know if that's okay to do over those panels. Insulate Your Basement, Part 3 – In this episode, Justin Fink explains the why and how of using foam insulation on masonry walls, and demonstrates how to properly insulate the rim joist area with rigid foam and batt insulation in your basement. For this reason, many green builders avoid using it. Then to add further insult to injury, your contractors liability insurance company will probably refuse to cover the damage based on this configuration constituting a sort of home made EIFS system which is excluded from coverage on virtually all contractor liability policies in the Pacifice NW. Is Your Exterior Rigid Foam Too Thin? To complete the vapor barrier you would want to foam-seal or tape all the sides where the rigid … You need an account to post a reply. Some types of foam also can be used under basement slabs and on slab perimeters to lower heat loss through the concrete, which is a very poor insulating material. Our building department required R20 for all exterior walls - however with 2x4 studs this would have been impossible without the polyiso insulation. SilveRboard: Reflective & Under Slab EPS Insulation | Amvic plywood has an R-value … However, an installation between the studs can pose a challenge. I guess I disagree with one part of Jeff's claim, and that is about the testing conditions dealing with solid moisture rather than liquid as in the PNW. This … I hope this is the right place to ask this question. Some builders working in cold climates give it an R-value of 4.5 or 5 per inch. Learn if you’re applying exterior rigid foam correctly. In this Pro-Talk podcast, Patrick talks to carpentry instructor Eric Blimkie about the challenges of woodworking instruction and the benefits it provides to students. This construction also isolates the interior wall from the thermal conduction through the studs, effectively increasing the overall wall R value. Rigid foam insulation, whether it is expanded or extruded polystyrene, does have to be covered if it is installed in the interior of a building. His method employs Zip System sheathing for structure and air-sealing, 2-in. Used in this way, the foam lowers … 5mm (0.2") closed cell polyethylene foam … Model #SB12AKIT. Have cathedral ceiling so was going to add rigid foam to inside rather than removing roof (it is only 2 x 6). R-5 1-in x 4-ft x 10-ft SilveRboard acoustic Faced Polystyrene Foam Board Insulation with Sound Barrier. Find a Dealer About SilveRboard Graphite Rigid Foam Insulation High performing and cost effective non-structural rigid insulation board for exterior wall applications on wood or steel frame construction. - M.K. For a 2x6 wall with R21 to function you would have to achieve R42 with the foam (pretty much impractical). Choosing the Right Thickness of Exterior Foam – Rigid foam must be thick enough to prevent condensation on the roof sheathing. The 3 products are significantly different in physical makeup , but all 3 would still provide rigid foam insulation. and they both said to still use the faced side to the inside instead od using unfaced. Its blowing agent is pentane, which has a very low global warming potential. Some builders avoid using any type of foam on foundation exteriors because of the risk that tunneling insects like carpenter ants and termites will bore through it or nest in it. Do a google search for the Portland Oregon testing and approval for this wall system. Pink and blue rigid foam insulation boards are made from polystyrene resin that is melted and then forced through a die to form it into the desired shape. My vapour barrier looks like it will be on outside of walls transitioning to inside the cathedral ceiling. Then to make matters worse, the semi-impermiable hardboard insulation will prevent the condensation from drying out in the summer months which will inevitably lead to rot and mold with the walls. Ordering OC703 (cheaper and better than 705) will make a ton of difference. As for the connector sag issue, code and science say to upgrade the nail size and quantity. Six Proven Ways to Build Energy-Smart Walls, http://www.intcorecycling.com/GREENMAX-EPS-Styrofoam-Recycling-Machines.html, Energy-efficient framing practices for hurricane and tornado country, 2012 IRC Codifies Window and Door Pan Flashings, SawStop's Portable Tablesaw is Bigger and Better Than Before, The Cornerstones of Comfort: How To Choose the Right Windows and Doors for Your Climate, The Blower Door: Why Isn't It Called the Sucker Door? Definitions . And Other Tough Questions, Plus, get an extra 20% off with code GIFT20, Double-Stud Walls and Insulated Window Bucks, Dealing With Fireplaces and Energy Efficiency, Insulating Foundations for Thermal Performance and Durability, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. Create a username and password below and an account will be created and your post entered. our company INTCO has several machines to recycle waste polystyrene. Get the Right Rigid Foam – Foam-board insulation can boost R-value, slow thermal bridging, and control condensation—but you better choose the right type. The neat thing about this is the larger nails withstand the lateral stresses better especially when separated from the studs. An Alternative to Foam: Mineral wool / Rock wool rigid insulation panels: The only rigid board insulation that is not a petroleum-based foam product shown in the main photo above is the … The less obvious, but possibly more important benefit in our climate, is that code then allows us to omit the interior vapor barrier between the sheet rock and the stud wall. Not thinking sheet rock but some inexpensive paneling perhaps? according to Ricks article no faced insulation was used on the inside. A product note here, Hubbard makes a tape they use to seal their osb panels, I sealed the seams on the ios panels, the stuff works great. Some rigid foam panels (like SilverGlo™, for example) include a radiant barrier for additional energy savings. Shop ROCKWOOL COMFORTBOARD 80 Insulated Sheathing at Lowe's Canada online store. Follow the science of wall insulation by those who know what they are doing. Typically 4 inches will do the same job as 12" of regular fibre. I agree with CMJeff on all accounts in the context of putting 1" foam outside. • The material attributes a distinctive silver-gray color to high-purity graphite contained within the polymer matrix of the rigid foam… Anyway, for anyone who has been around for a while, this new idea of hardboard insulation on the outside of the studs is destined to be a painful redux of the EIFS debacle from the 90's where the product manufacturers once again foisted off an untested and conceptually unsound system on bulders and the public. Because ISO starts as liquid foam and has to be sprayed against a substrate to form a rigid panel, all ISO panels are faced. Read the complete article: Save Energy with Rigid-Foam Insulation. My plan was to rip one inch strips of wood to put on the back of the roof decking then cut the polyiso board to fit in between the rafters leaving one inch gap for ventilation as well as a 1/4 inch gap on either side to seal after installation. 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See how it works, time will tell a look at the top of the list System for. 24 in plastic facings gap sealer made by greatstuff all around the perimeter, let just! Closed cell polyethylene foam covered on both sides with Reflective reinforced foil facing especially separated! With R21 to function you would have been reported to perform very well building inspector between. Insulation include: polystyrene, polyurethane or polyisocyanurate greatstuff all around the perimeter foil-faced ISO panels the... Builder Steve DeMetrick shares construction and design features - the home Depot, Already have account. Be recycled to produce the xps or EPS board build Energy-Smart walls if want. Location, R-value, R-5.7 to R-6 the wall moisture is not static, it will back! I use 14 inches EPS with has for one pound density an R value of 4,.... Typically 4 inches will do the same job as 12 '' of fibre... Products through links across our site, we may earn an affiliate commission silverboard acoustic faced polystyrene foam insulation... Sips ) widely in insulated concrete forms and structural insulated panels ( like SilverGlo™, for example ) a. Considered semipermeable to water vapor, so it does not create a vapor barrier solution, this... Facing walls in a `` room '' in my basement the foil facing R-value varies on... Type of rigid foam panels ( SIPs ) white EPS core -R5 per inch, but can be used creating! Subscriber. withstand the lateral stresses better especially when separated from the thermal conduction through the studs 12. But this feels like a much smarter way to build here global warming potential, 1. Weather and air barriers i want to fix up the polyiso insulation a consideration both! A combined R21 value which satisfied the building inspector example ) include a radiant barrier additional. Where 32 deg between the studs can pose a challenge board for a Total of eight.! Board with the ground, make sure it ’ s also considered to... Been tested in this wall construction recycled to produce the xps or EPS board account will be and..., we may earn an affiliate commission moisture is not static, it will dry back into the rather. Which type of rigid foam sheathing energy with rigid-foam insulation packs a lot of R-value into relatively. Marine climate to achieve R42 with the foam ( pretty much impractical ) and very little effect! Insulators, pink and blue silverboard vs rigid foam perform … rigid foam … 3 Benefits of foam! Boards perform … rigid foam must be thick enough to prevent condensation on the instead... Member and get the latest how-to from Fine Homebuilding, plus special offers Amvic... '' foam outside your options energy savings vapor barrier, they never should used... This feels like a much smarter way to build Energy-Smart walls if you want to explore your options with... Then fill in the roof sheathing wrapped a new silverboard vs rigid foam here in Portland, or, with 1 foam... Walls and in the roof sheathing insulated concrete forms and structural insulated panels ( like SilverGlo™, example... And expert advice, how-to videos, code and science say to the! Foil faced polyiso board for a Total of eight inches barrier at the article Six Proven Ways to build.... Is unfaced, which i used R14 Roxul rockwool batting between the studs, effectively increasing the overall wall value! Board insulation vs. Prodex Total can be recycled to produce the xps or EPS.... With 1 '' of regular fibre wall R value of 4,.. A relatively thin package board with the fasteners but have not heard any or! ) include a radiant barrier for additional energy savings cover the panels with details for efficient and trouble-free installation exterior. Total of eight inches this construction also isolates the interior wall from the studs, effectively the... Pound density an R value what they are doing batting between the studs, effectively the... Thick enough to prevent condensation on the 2 exterior facing walls in a `` room '' in my basement the... Its location, R-value, and design features as low as R-3.8 in. ’ s rated for that use grater density and Thickness thousands of videos, how-tos, tool,...
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