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 … After reading Rick Arnold's article about ios panels, which I used, I checked with a couple of insulation mafg. 3 Benefits of Rigid Foam Sheathing. As insulators, pink and blue boards perform … Thermal drift, the gradual lowering of R-value over time, is a consideration with both XPS and Polyisocyanurate. It is often used as a layer of continuous insulation on exterior walls and in the roof. 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. However, an installation between the studs can pose a challenge. 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. • GPS is a unique material used, in its final form, as ‘rigid thermal insulation’ in the construction industry. Its been promoted as a "reducer of sound transmition". 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. I have Foil-faced ISO panels on the 2 exterior facing walls in a "room" in my basement. The idea makes sense, if it’s done correctly. ISO panels are the most expensive of the three and has the highest nominal R-value, R-5.7 to R-6. 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. 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. according to Ricks article no faced insulation was used on the inside. It is only 2mil thick and I don't see how it works, time will tell. I want to fix up the room to look nice, though on a strict budget. And the waste polystyrene is also can be recycled to produce the xps or eps board. 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. 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. EPS is suitable for ground contact and can be treated to resist insects. This wall covering must have a minimum fire rating to protect the … Your vapor barrier should be with your collection of housewrap, and rigid foam in this wall construction. Because applying these products as sheathing creates an exterior vapor barrier, they never should be used with an interior vapor barrier. However they have little, let's just call it NO acoustic absorption and very little blocking effect. Find My Store. our company INTCO has several machines to recycle waste polystyrene. SilveRboard Graphite is a Graphite impregnated grey EPS board that is low density but high R value -R4.5per inch SilveRboard … Item #2544466. 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. … 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. I can confidently say that I expect to be a life-long subscriber." Its blowing agent is pentane, which has a very low global warming potential. 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. I would like to add to what he says. Any questions or concerns would be much appreciated. Create a username and password below and an account will be created and your post entered. This construction also isolates the interior wall from the thermal conduction through the studs, effectively increasing the overall wall R value. 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. 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. Learn if you’re applying exterior rigid foam correctly. We just wrapped a new house here in Portland, OR, with 1" of unfaced xps. Since the wall moisture is not static, it will dry back into the house rather quickly.Where you can also control it. If you plan on placing it in contact with the ground, make sure it’s rated for that use. For this type … 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. Used in this way, the foam lowers … 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 obvious upside is the thermal insulation gain. I'm finishing up a 1200 sq/ft addition and energy efficency was at the top of the list. It’s also considered semipermeable to water vapor, so it does not create a vapor barrier. 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. For a 2x6 wall with R21 to function you would have to achieve R42 with the foam (pretty much impractical). 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. I am finishing a third floor of a two and a half story house. Thicker, faced XPS is stronger and can have a lower perm rating, but it is still considered a vapor retarder, not a vapor barrier. SilveRboard (AMCVIC) Rigid Foam Insulation, SilveRboard 24 in. It can be as low as R-3.8 per in. An Irish manufacturer offers a fourth and more recently developed type, phenolic foam. They act like a moment connection, bending but not tearing out the sheathing. Win - win. Is Your Exterior Rigid Foam Too Thin? This provides a combined R21 value which satisfied the building inspector. And even though some manufacturers call it rigid foam … 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 is the basic solution, but can be improved as necessary on harsh climates using grater density and thickness. 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. As for the connector sag issue, code and science say to upgrade the nail size and quantity. It is often used as a layer of continuous insulation on exterior walls and in the roof. 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. The science I read suggests that this is close to optimal construction for our marine climate. I used R14 Roxul rockwool batting between the 2x4 studs and a 1 inch foil faced polyiso board on the interior surface. Check with your local building office first. Typically 4 inches will do the same job as 12" of regular fibre. They come in 2'x4' sheets; … 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. Divide your temperature difference by your Rs and plot where 32 deg. New White Prodex Total 5M Plus: R15.3. Better than the foil tape. 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. Crawl Space Ventilation . or as high as R-8 per in. 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. 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). Interior sheathing was 1/2" G1S fir ply. Polyiso is not rated for ground contact. I have 2x10 rafters. Compare; Multiple Options. EPS is the insulation used most widely in insulated concrete forms and structural insulated panels (SIPs). Follow the science of wall insulation by those who know what they are doing. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. I was going to double up the polyiso board for a total of eight inches. 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. Take a look at the article Six Proven Ways to Build Energy-Smart Walls if you want to explore your options. Detailing Walls With Rigid Foam – Builder Steve DeMetrick shares construction and design details for efficient and trouble-free installation of exterior foam sheathing. XPS comes unfaced or with a number of different plastic facings. You need an account to post a reply. and they both said to still use the faced side to the inside instead od using unfaced. 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. Because ISO starts as liquid foam and has to be sprayed against a substrate to form a rigid panel, all ISO panels are faced. Just don't know if that's okay to do over those panels. Those and PUR insulations are thermally extremely efficient. Model #SB12AKIT. My vapour barrier looks like it will be on outside of walls transitioning to inside the cathedral ceiling. When applied as sheathing, EPS should be used over housewrap. Get home building tips, offers, and expert advice in your inbox. More permeable ISO panels are faced with fiberglass and can be used without creating a vapor barrier. 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. So with up to 2" of insulation and 1/2" sheathing, you go with 16d nails at 4 edges and 8" field. 5mm (0.2") closed cell polyethylene foam covered on both sides with reflective reinforced foil facing. 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. Ordering OC703 (cheaper and better than 705) will make a ton of difference. 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 … foil-faced foam for exterior insulation, and a felt-paper weather-resistive barrier behind a rain screen. What i wound up also using was that breathable vapor barrier that Certinteed sells. 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 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 … Find Foam Board Insulation at lowest price guarantee. EPS insulation is used in the construction of buildings to insulate roofs, walls, floors or foundations. Prodex Total 5M Plus - R17. SilveRboard 24 in. All seams were taped with foil tape so the vapor barrier was intact. It also is the least expensive. Also, remember there are other options for continuous exterior insulation, including mineral wool and fiberboard insulation, neither one of which is comprised of petrochemicals. 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. When you buy products through links across our site, we may earn an affiliate commission. You can always build and spend more, but this feels like a much smarter way to build here. I have a question. 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 just want to know how or what I can use to cover the panels with. Then fill in the 1/4 gap with a gap sealer made by greatstuff all around the perimeter. This … - M.K. 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". lands. 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? Unfaced 1-in.-thick XPS has a perm rating of around 1, making it semipermeable. For transition was going to use rigid foam between rafters, over top of the wall and sealed to the Silverboard… I hope this is the right place to ask this question. Im guessing better than the average rigid foam … I have at my disposal four inch polyiso board with the foil facing. 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 ). x 1 in. I use 14 inches EPS with has for one pound density an R value of 4, 14x4=56. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. the NCR is 0.19. any thoughts? For this reason, many green builders avoid using it. Foil-faced ISO panels are considered vapor impermeable. There are three basic foam insulation board products on the market produced under several different manufacturer names. The foil, too, acts as a vapor barrier. The 10-in. 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