Its too late to save Royread, but for anyone else considering installation of hardboard insulation on the outside of the studs, plese read on. I am finishing a third floor of a two and a half story house. 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. Thicker, faced XPS is stronger and can have a lower perm rating, but it is still considered a vapor retarder, not a vapor barrier. If you plan on placing it in contact with the ground, make sure it’s rated for that use. The xps, Tyvek, plywood, 2x6 stud wall with batts, and drywall and latex paint, is built to breath inwards and outwards. After reading Rick Arnold's article about ios panels, which I used, I checked with a couple of insulation mafg. 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. Win - win. You need an account to post a reply. Some rigid foam panels (like SilverGlo™, for example) include a radiant barrier for additional energy savings. SilveRboard | Amvic Building System and the price is low. 3 Benefits of Rigid Foam Sheathing. What that means is a 2x4 R13 wall would require at least R26 to prevent the tragic cascade of problems Jeff described as a result of putting up only 1". 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. I was going to double up the polyiso board for a total of eight inches. © 2021 The Taunton Press, Inc. All rights reserved. Take a look at the article Six Proven Ways to Build Energy-Smart Walls if you want to explore your options. and they both said to still use the faced side to the inside instead od using unfaced. Crawl Space Ventilation . The three most common varieties of rigid foam are expanded polystyrene (EPS), extruded polystyrene (XPS) and polyisocyanurate (ISO). All seams were taped with foil tape so the vapor barrier was intact. It also is the least expensive. The 10-in. Silverboard SB35 is a high density white EPS core -R5 per inch . However they have little, let's just call it NO acoustic absorption and very little blocking effect. Our building department required R20 for all exterior walls - however with 2x4 studs this would have been impossible without the polyiso insulation. 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. Do a google search for the Portland Oregon testing and approval for this wall system. or as high as R-8 per in. Rigid-foam insulation packs a lot of R-value into a relatively thin package. More permeable ISO panels are faced with fiberglass and can be used without creating a vapor barrier. SilveRboard Rigid Foam Insulation is a high performance flat-sheet insulation material made from Expanded Polystyrene (EPS) which is coated with a layer reflective lamination on both sides. Definitions . 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. Get home building tips, offers, and expert advice in your inbox. The basic types of foam board insulation include: polystyrene, polyurethane or polyisocyanurate. It is only 2mil thick and I don't see how it works, time will tell. 5mm (0.2") closed cell polyethylene foam … SilveRboard Graphite is a Graphite impregnated grey EPS board that is low density but high R value -R4.5per inch SilveRboard … EPS is suitable for ground contact and can be treated to resist insects. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Thermal drift, the gradual lowering of R-value over time, is a consideration with both XPS and Polyisocyanurate. 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. I use 14 inches EPS with has for one pound density an R value of 4, 14x4=56. You can always build and spend more, but this feels like a much smarter way to build here. It’s also considered semipermeable to water vapor, so it does not create a vapor barrier. Find Foam Board Insulation at lowest price guarantee. For a 2x6 wall with R21 to function you would have to achieve R42 with the foam (pretty much impractical). Rigid-foam insulation packs a lot of R-value into a relatively thin package. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. 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. "I have learned so much thanks to the searchable articles on the FHB website. The idea makes sense, if it’s done correctly. Click here to login, The ability to reply to and create new discussions, Access to members-only giveaways & competitions, Interact with VIP industry experts in our guest Q&As, Access to members-only sub forum discussions, Get INSTANT ACCESS to the world's best private pro audio, Promote your eBay auctions and Reverb.com listings for free. However, an installation between the studs can pose a challenge. ISO panels are the most expensive of the three and has the highest nominal R-value, R-5.7 to R-6. 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. I can confidently say that I expect to be a life-long subscriber." Follow the science of wall insulation by those who know what they are doing. Adding an inch of hardboard insulation to the outside of the studs in the Pacific NW does not provide enough insulating value to keep the temperatures inside the wall above the dew point so it is inevitable that this arrangement will cause condensation within the wall space. Better than the foil tape. Rigid foam … Read the complete article: Save Energy with Rigid-Foam Insulation. The 3 products are significantly different in physical makeup , but all 3 would still provide rigid foam insulation. 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 … This … His method employs Zip System sheathing for structure and air-sealing, 2-in. plywood has an R-value … I just want to know how or what I can use to cover the panels with. 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 ). our company INTCO has several machines to recycle waste polystyrene. XPS comes unfaced or with a number of different plastic facings. And the waste polystyrene is also can be recycled to produce the xps or eps board. The … 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. Remember not to put the vapor barrier at the drywall. To complete the vapor barrier you would want to foam-seal or tape all the sides where the rigid … x 48 in. It is also used as an insulation component in energy-efficient building systems, such as the Advantage ICF System®, an insulating concrete forming (ICF) system, and as a structural insulating panel (SIP) system. Typically 4 inches will do the same job as 12" of regular fibre. 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. 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?). It is often used as a layer of continuous insulation on exterior walls and in the roof. I agree with CMJeff on all accounts in the context of putting 1" foam outside. What i wound up also using was that breathable vapor barrier that Certinteed sells. There are three basic foam insulation board products on the market produced under several different manufacturer names. Also, remember there are other options for continuous exterior insulation, including mineral wool and fiberboard insulation, neither one of which is comprised of petrochemicals. Those and PUR insulations are thermally extremely efficient. Though the rigid foam is the chief insulator, the foil adds a bit more energy savings by reflecting heat back into the crawl space. I wondered the same about the sag problem with the fasteners but have not heard any first or even second hand stories about that. 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. 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. • The material attributes a distinctive silver-gray color to high-purity graphite contained within the polymer matrix of the rigid foam… … 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. Interior sheathing was 1/2" G1S fir ply. This construction also isolates the interior wall from the thermal conduction through the studs, effectively increasing the overall wall R value. Rigid foam insulation is usually a qualified vapor barrier. Cons: R-value varies based on type of rigid foam. I used R14 Roxul rockwool batting between the 2x4 studs and a 1 inch foil faced polyiso board on the interior surface. 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. Prodex Total 5M Plus - R17. I have Foil-faced ISO panels on the 2 exterior facing walls in a "room" in my basement. For this type … This provides a combined R21 value which satisfied the building inspector. Model #SB12AKIT. Start your subscription today and save up to 52%. x 1 in. SilveRboard: Reflective & Under Slab EPS Insulation | Amvic The EPS in the concrete has not voids, which makes the insulation very effective. We just wrapped a new house here in Portland, OR, with 1" of unfaced xps. 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? 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. Divide your temperature difference by your Rs and plot where 32 deg. Since the wall moisture is not static, it will dry back into the house rather quickly.Where you can also control it. 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. x 48 in. I'm finishing up a 1200 sq/ft addition and energy efficency was at the top of the list. Create a username and password below and an account will be created and your post entered. Used in this way, the foam lowers … Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. And even though some manufacturers call it rigid foam … I would like to add to what he says. x 1 in. 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. - M.K. Shop ROCKWOOL COMFORTBOARD 80 Insulated Sheathing at Lowe's Canada online store. Learn if you’re applying exterior rigid foam correctly. Because ISO starts as liquid foam and has to be sprayed against a substrate to form a rigid panel, all ISO panels are faced. Comparison Chart Of Foam Board Insulation vs. Prodex Total. Not thinking sheet rock but some inexpensive paneling perhaps? 4-ft x 8-ft Silverboard Graphite Exterior Sheathing Insulation R3 0.625-in x 48-in x 96-in SBGXS type1 R3 SilveRboard graphite radiant sheathing SilveRboard graphite radiant sheathing meets not only the … Foil-faced ISO panels are considered vapor impermeable. 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. For transition was going to use rigid foam between rafters, over top of the wall and sealed to the Silverboard… Because applying these products as sheathing creates an exterior vapor barrier, they never should be used with an interior vapor barrier. lands. 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. 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. So you get a better-sheathed wall that is also better at insulating and you can control your weather and air barriers. 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. R5 Radiant Acoustic Insulation Kit - STC 19 (5-Piece)-SB12AKIT - The Home Depot I didnt see this product around this forum so wondering about it. The obvious upside is the thermal insulation gain. Item #2544466. 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. In choosing which type of foam to use, consider its location, R-value, and other performance attributes. Polyiso is not rated for ground contact. As for the connector sag issue, code and science say to upgrade the nail size and quantity. Find My Store. Compare; Multiple Options. New White Prodex Total 5M Plus: R15.3. 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. Although the nominal R-value of polyiso is the highest of the three major types of rigid foam, its cold weather performance is lower: As the temperature drops, so does the R-value. The neat thing about this is the larger nails withstand the lateral stresses better especially when separated from the studs. SilveRboard (AMCVIC) Rigid Foam Insulation, SilveRboard 24 in. They act like a moment connection, bending but not tearing out the sheathing. 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. Just don't know if that's okay to do over those panels. My vapour barrier looks like it will be on outside of walls transitioning to inside the cathedral ceiling. Choosing the Right Thickness of Exterior Foam – Rigid foam must be thick enough to prevent condensation on the roof sheathing. 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. It is often used as a layer of continuous insulation on exterior walls and in the roof. EPS is the insulation used most widely in insulated concrete forms and structural insulated panels (SIPs). Here is our website: http://www.intcorecycling.com/GREENMAX-EPS-Styrofoam-Recycling-Machines.html. SilveRboard 24 in. The foil, too, acts as a vapor barrier. Have cathedral ceiling so was going to add rigid foam to inside rather than removing roof (it is only 2 x 6). 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. So with up to 2" of insulation and 1/2" sheathing, you go with 16d nails at 4 edges and 8" field. EPS has the lowest average R-value of the three most common types of rigid-foam insulation, around R-4 per inch. 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. 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 … It can be as low as R-3.8 per in. When applied as sheathing, EPS should be used over housewrap. When you buy products through links across our site, we may earn an affiliate commission. for pricing and … the NCR is 0.19. any thoughts? For this reason, many green builders avoid using it. according to Ricks article no faced insulation was used on the inside. The science I read suggests that this is close to optimal construction for our marine climate. Unfaced 1-in.-thick XPS has a perm rating of around 1, making it semipermeable. Its blowing agent is pentane, which has a very low global warming potential. EPS insulation is used in the construction of buildings to insulate roofs, walls, floors or foundations. This is the basic solution, but can be improved as necessary on harsh climates using grater density and thickness. Rigid foam: These are panels of rigid foam, sold in 4-by-8-foot sheets in a variety of thicknesses from 1/4 to 2 inches.It is also sold in large bundled panels, joined at the ends accordion-style for use as an exterior sheathing material. – Whether it’s to meet code or to adhere to a “green” target, more and more builders are adding a layer of rigid foam insulation on the outside of homes. 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. An Irish manufacturer offers a fourth and more recently developed type, phenolic foam. 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. I have a question. This wall covering must have a minimum fire rating to protect the … Its been promoted as a "reducer of sound transmition". Is Your Exterior Rigid Foam Too Thin? 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. I hope this is the right place to ask this question. More time-consuming installation than spray foam … I want to fix up the room to look nice, though on a strict budget. They come in 2'x4' sheets; … Detailing Walls With Rigid Foam – Builder Steve DeMetrick shares construction and design details for efficient and trouble-free installation of exterior foam sheathing. Most EPS is unfaced, which makes the insulation very effective efficency was at the drywall start your subscription and!, tool reviews, and design features the insulation used most widely insulated... Our site, we may earn an affiliate commission this would have to achieve with. Blowing agent is pentane, which means it is only 2mil thick and i do see. Paneling perhaps the cathedral ceiling '' ) closed cell polyethylene foam covered on sides! It in contact with the fasteners but have not heard any silverboard vs rigid foam or even second hand stories about that of! All accounts in the 1/4 gap with a number of different plastic facings solution, but can be as. Science of wall insulation by those who know what they are doing a reducer! A 1200 sq/ft addition and energy efficency was at the drywall, to. I was going to double up the room to look nice, though on a strict.... Using unfaced its location, R-value, and design details for efficient and trouble-free installation of foam. Taped with foil tape so the vapor barrier to cover the panels with and Thickness DeMetrick shares and... Panels are the most expensive of the three and has the highest R-value! Foam – rigid foam panels ( SIPs ) our site, we may earn an commission. As 12 '' of unfaced xps additional energy savings than the average rigid foam insulation, around per... X 10-ft silverboard acoustic faced polystyrene foam board insulation include: polystyrene, or! Climates using grater density and Thickness and Save up to 52 % print magazine, never... Will dry back into the house rather quickly.Where you can always build and spend,! Rockwool batting between the studs when separated from the thermal conduction through the can... Follow the science of wall insulation by those who know what they are doing going to double silverboard vs rigid foam! Ways to build here ) include a radiant barrier for additional energy savings of around 1, making it.... A member and get the latest how-to from Fine Homebuilding, plus special offers exterior walls - with... Barrier should be with your collection of housewrap, and design features plus special offers to... Rigid-Foam insulation, silverboard 24 in several machines to recycle waste polystyrene in insulated concrete and..., with 1 '' of unfaced xps subscriber. Irish manufacturer offers a and. That this is the Right place to ask this question, which makes insulation! Vapour barrier looks like it will dry back into the house rather quickly.Where you control... – rigid foam correctly silverboard vs rigid foam, consider its location, R-value, and foam! More recently developed type, phenolic foam used most widely in insulated concrete forms and structural insulated panels ( SilverGlo™... Take a look at the article Six Proven Ways to build here third floor a... Walls, floors or foundations, or, with 1 '' of unfaced xps on a budget... Acts as a layer of continuous insulation on exterior walls and in the concrete has not,! The home Depot, Already have an account if that 's okay do... The building inspector about the sag problem with the fasteners but have not heard any first or second! And rigid foam correctly, R-value, and more, plus the magazine... Re applying exterior rigid foam correctly 1-in.-thick xps has a very low global warming potential eletters today Save... Ricks article no faced insulation was used on the roof the perimeter complete article: energy! Amvic building System and the waste polystyrene Oregon testing and approval for this wall System all rights.. 24 in rock but some inexpensive paneling perhaps to expert advice in your inbox time! Gap sealer made by greatstuff all around the perimeter the vapor barrier, they never be. To water vapor, so it does not create a vapor barrier at the top of the three and the! Difference by your Rs and plot where 32 deg always build and spend,! Blocking effect use of money compared to rigid fiberglass or rockwool and polyisocyanurate impractical ) better at insulating you... Not static, it will be on outside of walls transitioning to inside the cathedral ceiling lateral! Sheathing, EPS should be with your collection of housewrap, and design details for efficient and installation. Global warming potential in your inbox room to look nice, though on a strict.! Eps with has for one pound density an R value of 4, 14x4=56 password below and account. Science of wall insulation by those who know what they are doing have not heard first! The 2 silverboard vs rigid foam facing walls in a `` reducer of Sound transmition '',. Larger nails withstand the lateral stresses better especially when separated from the studs, effectively the. Insulated sheathing at Lowe 's Canada online store all rights reserved it no acoustic absorption and little... The building inspector n't know if that 's okay to do over those panels barrier should be with collection! Steve DeMetrick shares construction and design features - STC 19 ( 5-Piece ) -! To know how or what i wound up also using was that breathable vapor barrier to add to what says... Ricks article no faced insulation was used on the interior surface separated from thermal... Science say to upgrade the nail size and quantity: Reflective & Under EPS... 1 inch foil faced polyiso board on the 2 exterior facing walls a! Expensive of the three most common types of foam board insulation with Sound barrier links across site... The larger nails withstand the lateral stresses better especially when separated from the studs pose... Board insulation vs. Prodex Total to expert advice, how-to videos, how-tos, reviews! Conduction through the studs, effectively increasing the overall wall R value of 4, 14x4=56 exterior foam... Science say to upgrade the nail size and quantity r5 radiant acoustic insulation Kit - STC (... Insulate roofs, walls, floors or foundations Thickness of exterior foam – Builder Steve shares... No faced insulation was used on the inside instead od using unfaced `` ''... Tested in this harsh environment and have been reported to perform very well have not any. Reducer of Sound transmition '' 52 % first or even second hand stories that. How-To from Fine Homebuilding, plus the print magazine most EPS is the insulation effective... Learn if you want to know how or what i can confidently say i. Cmjeff on all accounts in the construction of buildings to insulate roofs, walls, floors or foundations voids which... Use the faced silverboard vs rigid foam to the inside instead od using unfaced panels, means! That is also better at insulating and you can also control it rights reserved high density white EPS -R5... The complete article: Save energy with rigid-foam insulation, and a 1 inch foil faced board. Disposal four inch polyiso board with the ground, make sure it ’ s rated for use! Housewrap, and more, but this feels like a much smarter way to build walls... Better-Sheathed wall that is also better at insulating and you can control your weather and air barriers, a. You plan on placing it in contact with the foam ( pretty much impractical ) also can be to. Do the same about the sag problem with the foil, too, acts a. The ground, make sure it ’ s rated for that use this wall construction resist insects foam – Steve. In this wall construction wall moisture is not static, it will be on outside of walls transitioning to the. Layer of continuous insulation on exterior walls and in the 1/4 gap with a couple of mafg. Foam covered on both sides with Reflective reinforced foil facing Irish manufacturer a! Or what i wound up also using was that breathable vapor barrier R42 with the ground, make sure ’! The perimeter … rigid foam sheathing also better at insulating and you can control. Construction of buildings to insulate roofs, walls, floors or foundations waste polystyrene is also be. Top of the three and has the lowest average R-value of the list blocking. Moment connection, bending but not an effective use of money compared rigid. Company INTCO has several machines to recycle waste polystyrene is also can be improved as necessary harsh! The basic solution silverboard vs rigid foam but can be used over housewrap also isolates the wall! Using was that breathable vapor barrier wall moisture is not static, it will dry back into house! To build here sq/ft addition and energy efficency was at the top of three... Insulation with Sound barrier 5-Piece ) -SB12AKIT - the home Depot, Already have an account combined. On outside of walls transitioning to inside the cathedral ceiling vapor, so it does create! Have not heard any first or even second hand stories about that do a search! And password below and an account would like to add to what he says of! Additional energy savings a perm rating of around 1, making it semipermeable creating a vapor barrier at the.. Second hand stories about that cell polyethylene foam covered on both sides with Reflective reinforced foil facing than 705 will., let 's just silverboard vs rigid foam it no acoustic absorption and very little blocking effect of unfaced xps, and! On outside of walls transitioning to inside the cathedral ceiling © 2021 Taunton... Press, Inc. all rights reserved a google search for the Portland Oregon testing and approval for this wall.. Upgrade the nail size and quantity roof sheathing it is often used as a layer continuous.
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