2 Inch Polyiso Insulation R Value

Polyisocyanurate (Polyiso) Among rigid foam insulations, EPS and GPS have the highest R-value per dollar, which makes them well-suited for cost-effective continuous insulation. The study you are referring to is based on MEAN temperature. 80 per inch Wood. The higher the R-value, the better the resistance to the flow of heat (BTUs) and the better the insulation. Fiberglass vats are the standard insulator for 2-inch by 4-inch wall framing, and are rated R-11 through R-15. With a stabilized 3/4" air space on one side of this insulating board its R-value at 1" increases to R10. "In roof applications, permeable facers are preferred and the. They tested polyiso at 2" and 4" thicknesses. Better than spray foam (thermal break and relatively consistent R-30+). PART 2 - PRODUCTS 2. on 7/16” OSB (R-value 0. • New composite insulation: Combining the features of MAI panels (very high R-value) and polyiso (high R-value and durability). As gas escapes, however, the R-value of polyiso can drop over time, but foil and plastic facings can help stabilize that number. The polyiso industry uses CAN/ULC/S770 5, to accelerate aged R-value. You can expect to pay about $55/100 sq. Thermal Insulation: inch for inch, polyiso has one of the highest energy efficiencies. 00 per 4" all with foil face Stop at Grabers Oak Flooring and Pole Buildings for wall ceiling attic room truss cabin ice house insulation needs Light in Weight, Heavy in Performance Poly iso foil is a rigid polyisocyanurate insulation sheathing with a foil facer laminated on the top and bottom side. 3 perms ASTM E96). Polyiso is not rated for ground contact. Batt insulation can be made of fiberglass, mineral wool, plastic fibers or natural fibers. 5 can achieve the same insulating value with as little as half the thickness required by alternative insulating materials. While expensive, the best insulation is PolyISO rigid foam. Because both materials offer high R-values (R 5. FOAMULAR® Extruded Polystrene Insulation Resisting Water Absorption, the Key for High Performance Foam Plastic Rigid Insulation time 5 year aging. Hunter Panels - The Innovator of Polyiso Products An interesting thing happened 21 years ago when Hunter set out to manufacture the absolute most effective, efficient and innovative Polyiso insulation panels available anywhere - we also created the finest customer service organization and builder support team in the industry. It has one of the highest R-values per inch of thickness among common insulations. The “NRCA” conducted a research study after noticing a drop in thermal performance in polyiso roof boards over. 8 consisting of two (2) layers of 3” thick (min of R-5. Polyiso/PU foam (like Thermax) is about twice that dense (2 lb. Apologies to RB, whose post ended up at the top of this thread. [email protected] Easy online ordering and next-day delivery available with 24/7 expert product support. Roof attachment using heavy-duty screws and barbed plates, 6 inches O. 6/inch (all eyeballed off the graph). These values can be used as design R-Values that more closely represent the anticipated thermal performance over the life of isocyanurate foam insulation products. Last time I checked, polyisocyanurate has the best insulation value per inch (R-6. 3 inch and 1. The higher the R-value, the more effective the material is at preventing heat transfer. When choosing rigid foam insulation, you have three main options: Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6. 9 per inch of thickness. Closed Cell Polyisocyanurate Foam Core: Provides high R-value per inch in built-up, modified bitumen, metal roof and single ply roof systems, and utilizes an environmentally compliant blowing agent that provides high thermal insulation performance. With the highest R-value per inch in the roofing industry, based on LTTR (long-term thermal resistance), it is the most effective thermal insulation product on the market. As a result,. Most insulation manufacturers will first list their insulation's R-Value for a one-inch sample, then they'll give you a chart demonstrating the other R-Values you can achieve if you install a thicker version of their product. Insulation is measured by its "R value" per square inch - the higher the value, the more effective the insulation. ) of new Polyiso rigid foam insulation is reported to range from 5. Polyiso Polyisocyanurate R-value Resistance to. All foam insulation products are petroleum-derived. This approximatethickness may help you choose your insulation material, especially if you areworking within a confined space. 6 to R-8 per inch, which is 45% more than mineral wool insulation. Thermal image of a structure built without insulated sheathing. Polyiso insulation is used in Phoenix residential and commercial construction projects. However, labeled R-value differs from in-service R-value for many insulations. 1 Polyisocyanurate Rigid Foam Insulation Board. Traditional loose-fill insulation, such as fiberglass or cellulose, has an R value between R-2. Seconds are typically generated due to blemishes in the product such as paper creases, misaligned facers and blow holes (small air pockets in the insulation). Polyiso insulation is used in Phoenix residential and commercial construction projects. R value measures the resistance of heat transfer from one side of an object to another. Develop a 2-inch thick polyiso board insulation with modified atmosphere insulation (MAI) cores that have an R-value of 25 (R12/inch) and a cost premium of no more than $0. Polyisocyanurate, Extruded Polystyrene, Expanded Polystyrene. 1 or just slightly better than the R-6 per inch for a 1-inch sample. In the summer, insulation reduces the heat flow from the hot exterior to the cool interior environment. POLYISO Understanding the importance of insulation, and the amount required in your region is the first step in combating the elements. A rigid roof insulation panel composed of a closed-cell polyisocyanurate foam core bonded to glass-reinforced felt (GRF) facers. Let's use the R-Value of IKO's polyiso insulation, Enerfoil TM, as an example. Polyiso is unique in that the R-value increases with the thickness of the foam, so three inches of polyiso has a higher R-value per inch than two inches. 0 is Dyplast Products’ cornerstone polyisocyanurate rigid foam insulation within its broad ISO line of products. It's interesting to see how the R-value per inch seems to increase in some manufacturers literature. All the members of the Polyisocyanurate Insulation Manufacturers Association (PIMA) manufacture roof insulation products to meet ASTM C­1289. Insulation Depot does not warranty the R-value of its reclaimed. R-Values may vary by manufacturer and will vary by actual SIP thickness. Rigid foam R-values range from R-1 for 1/4-inch thick sheathing panels to R-15 for 3-inch thick panels. Building Insulation Compressed R-value Chart When compressed to less than its’ labeled thickness, glass fi ber insulation will experience a reduction in R-value. Long term thermal resistance (LTTR) can be measured using real-time aging, or aging can be artificially accelerated. 2 Polyisocyanurate Rigid Foam Insulation Board-754404 - The Home Depot Rmax R-Matte Plus Polyiso Rigid Foam Insulation Board is perfect to use with wall sheathing applications in new residential and commercial buildings. In 1987, based on extensive testing of in-service R-values, NRCA and the Midwest Roofing Contractors Association issued a joint technical bulletin regarding the in-service R-values of. 35/inch to 5. Look up the effective R-value of the installed insulation using the condition and measured inches. Various Insulation Material Thermal Conductivity Chart. 5 per inch (R-6. These panels isolate the outer steel panel from the interior steel frame eliminating thermal transfer found in compressed fiberglass types. 9 per inch of thickness. fan-fold bundle in a bag, 200 sq. " The range of R-values shown for these 2-inch samples at the lowest mean temperature (25°F) is from 4. Maybe the r value is accurate when the material is lab tested. (This equals ¾ inch space along a 14. R value measures the resistance of heat transfer from one side of an object to another. Polyisocyanurate board, foil-faced 7 Spray polyurethane foam 5. Absolutely not. It is intermediate in its permeability to moisture — with a 40 mm layer having a permeance of 2. R-Matte Rmax R-Matte Plus-3, 1/2 in. For example, plywood has an R-value of R-1. It has a low permeance rating and an R-value of R-6 per inch. 5 per inch of thickness. The amount of insulation recommended for your home is dependent on where you live, but here are some general guidelines: Attic. A double pane, low-e window with a well fitted insulation panel of this type is approaching the R value of a lot of walls. Since a cannot post above it, and want this info from Jed at the top of the thread, a hijack seems to be the answer. R Value Insulation Guide Find out everything you've ever wanted to know about the R value of insulation. This type of rigid foam usually comes with a reflective foil facing on both sides, so it can also serve as a radiant barrier. 5 can achieve the same insulating value with as little as half the thickness required by alternative insulating materials. Of course, you are also welcome to call us directly at (877) 311-0175 for immediate assistance. Much like our ISOMASS™ product above, this polyiso insulation is a closed-cell, rigid foam board insulation. Polyiso offers: A high R-value per inch compared to other insulation products used in commercial and residential construction. This lightweight, easy-to-handle insulation is suited for direct application onto steel, concrete, or wood deck. ACFoam Polyiso Roof Insulation. The high thermal resistance of the gas gives polyisocyanurate insulation materials an R-value typically from R-5. Rigid insulation provides thermal protection and it can also serve as an air and moisture barrier. At one time, R-values as high as R-7. Seconds are typically generated due to blemishes in the product such as paper creases, misaligned facers and blow holes (small air pockets in the insulation). The 3M SM600L that is used in a lot van insulation projects is said to have an R value of 5. The R-value of insulation is a value that is used to measure how well a specific type of insulation can resist heat flow. Please consult SIP manufacturers for individual product R-value information and SIP thicknesses available. 5 per inch (R-6. 5 lb/ft³ polyisocyanurate rigid, closed cell, foam insulation. All the members of the Polyisocyanurate Insulation Manufacturers Association (PIMA) manufacture roof insulation products to meet ASTM C­1289. • Loose, glass fibre insulation, incorporating a water-activated adhesive; • The dry insulation is misted with water and installed using a blowing machine. 6/inch (all eyeballed off the graph). From residential to commercial to multifamily, our customers work on construction projects that come in all shapes, sizes and scopes. Polyiso has a published R-Value of 5. The latest Tweets from PIMA - polyiso (@PolyisoPIMA). 9 per inch of thickness. • R‐10 insulation required, extending… - 2 feet below grade for climate zones 4 and 5 - 4 feet below grade for climate zone 6 • Insulation should extend downward from the top of the slab (with two options to reduce slab edge insulation R‐value) • Exterior slab insulation must be protected 46. Much like our ISOMASS™ product above, this polyiso insulation is a closed-cell, rigid foam board insulation. Most insulation manufacturers will first list their insulation's R-Value for a one-inch sample, then they'll give you a chart demonstrating the other R-Values you can achieve if you install a thicker version of their product. Metl-Span’s polyurethane core with HCFC 22, though, is recognized as having superior insulating qualities compared to all polyisocyanurate foams with HCFC 141b made in North America. Use the R-value table below to help you determine the R-value of your wall or ceiling assemblies. 3 After inding the required CI R-value, convert this to the thickness of polyiso needed. This may not seem like a big problem, but it is. Polyiso (Polyisocyanurate). 75/inch) • Closed cell insulation resists moisture • CCMC 12424-L 4x8 ft 2 ft high bundles 3/4, 1, 1-1/2, 2, in. Polyiso boards are pricier than other types of insulation, because they offer an R-value between 6 and 7 per inch—a big advantage over fiberglass, cellulose, and other rigid board products. At one time, R-values as high as R-7. ) of new Polyiso rigid foam insulation is reported to range from 5. Cuts easily with a knife or saw to fit in between studs, joists or rafters or screw directly on. 75 inches of polyisocyanurate insulation. Mule-Hide Poly ISO Flat insulations consist of a closed-cell polyisocyanurate foam core laminated to heavy, (non-asphaltic) glass fiber reinforced felt facers. Higher R value = less HVAC use = lower energy costs. For example, ½-inch gypsum board weighs around 2 lbs/sq. Shop rmax (common: 1-in x 4-ft x 8-ft; actual: 1-in x 4-ft x 8-ft) thermasheath-3 r6 faced polyisocyanurate foam board insulation in the foam board insulation section of Lowes. Polyisocyanurate exhibits the highest R-factor (insulating value) to thickness ratio of commercially available insulation, and our ISO-C1 product line provides higher R-factors and. R value measures the resistance of heat transfer from one side of an object to another. C518 R-Value, 1 inch D1621 Compressive Strength C272 Water Absorption E96 Water Permeability D2126 Dimensional Stability E84 Flammability Service Temperature, °F -297° to +300° Service Temperature, °C -183° to +149° Technical data included herein is as provided by respective manufacturers. Seconds are typically generated due to blemishes in the product such as paper creases, misaligned facers and blow holes (small air pockets in the insulation). R-values for different materials, or different thicknesses of the same material, may be added together to reach a total R-value for a system. Standard batts have an R-value of R-2. 25 Density Type VIII, White Face one side, Foil on the other, UL Listed, R-Value 2. Polyiso insulation is the most thermally efficient rigid board insulation available in the marketplace - it has the highest R-value per inch of thickness. Because of the aging process, the previously recognized R-values determined after six months of conditioning are higher than the average thermal values for a 15-year period (LTTR). com or call 610-791-4200. 9 per inch of thickness. Easy online ordering and next-day delivery available with 24/7 expert product support. Shop rmax (common: 1-in x 4-ft x 8-ft; actual: 1-in x 4-ft x 8-ft) thermasheath-3 r6 faced polyisocyanurate foam board insulation in the foam board insulation section of Lowes. Without continuous insulation, heat loss through framing (thermal bridging) is significant. The higher the R-value, the. It consists of a foam core sandwiched between two glass-fiber facers. 4, and an inch of closed cell spray foam insulation has an R value of 6. When used in a roofing system, the insulation retains its original dimensions, which prevents the formation of thermal bridges that could. 8 consisting of two (2) layers of 3” thick (min of R-5. At 25 degrees it dips to R-4. It has one of the highest R-values per inch of thickness among common insulations. I was thinking a 2"thick foam board (R-Max says an R-value of 12. (3) Average value through insulation cross section (4) R means resistance to heat flow. 00 per inch Polystyrene (XPS) 6. In addition to offering exceptional, long-term thermal performance, STYROFOAM™ Brand Extruded Polystyrene (XPS) Foam Insulation and polyisocyanurate insulation products from Dow:. Let's use the R-Value of IKO's polyiso insulation, Enerfoil TM, as an example. Polyiso Polyisocyanurate R-value Resistance to. You must also add this statement: "The R-value per inch of this insulation varies with thickness. SOPRA-ISO® Insulation SOPRA-ISO is a rigid polyisocyanurate thermal insulation panel for use in approved multi-ply membrane and flashing assemblies. R-Value Table Common Building Materials resistivity (r) (per inch thickness) Resistance(R) (for given matl. 5 inch R-Value Cavity Wall Finish Description Type EIFS 1 inch polyiso EIFS 1. All references to a minimum (min) R-30 roof insulation shall be changed to the above requirements. Polyiso remains the highest R-value per inch of any insulation. overall panel thickness based on the polyiso insulation and one layer of 7/16" (11. Let Grainger help you get up to code with a large selection of ASTM standard insulation boards. Along with knowing the R-value of a particular insulation, it is also important to calculate the R-value of a total system. Better insulation in buildings is a significant contributor towards the. Depending on the material, rigid foam has an R-value of R-3. With an R-value of 6. The higher the R-value, the greater the insulating power. R-values for this material are expressed usually in whole numbers, with most standard rigid board insulation having R-values of between 3 and 5 per inch of thickness of material. The R-value then remains unchanged unless the foam is damaged. Polyiso insulation also can be part of a waste management plan, aimed at diverting debris from landfills, redirecting resources back to the manufacturing processes, and allocating reusable materials to appropriate sites. Mule-Hide Poly ISO Tapered insulations consist of a closed-cell polyisocyanurate foam core laminated to heavy, (non-asphaltic) glass fiber reinforced felt facers. The XPS industry reports R-value based on real-time 5 year aging. In simple terms, R-values measure the effectiveness of insulation and a higher number represents more effective insulation. 1 Polyisocyanurate Rigid Foam Insulation Board. Foam board insulation can also provide a very good vapor barrier to prevent the movement of moisture from damp basement walls. A typical 2×4 stud filled with open cell spray foam will have an R value between 10. Rigid foam R-values range from R-1 for 1/4-inch thick sheathing panels to R-15 for 3-inch thick panels. Last time I checked, polyisocyanurate has the best insulation value per inch (R-6. ACFoam Polyiso Roof Insulation. Its blowing agent (water) is environmentally benign, and it is free of the brominated flame-retardant chemicals that taint EPS and XPS. Insulation Material Units Polyiso FoamGlas 2 Aged k-factor (at 75°F) Btu·in/hr·ft ·°F 0. Rmax Polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board; R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products. 5), polyiso rigid foam insulation has a higher R-value than both extruded polystyren (XPS) and. 5 inch XPS EIFS 3 inch EPS EIFS 3 inch polyiso Description: NOTE: Enter description of CMU to be included in calculation output CMU Description - if. Its speciality is that its R value increases with the thickness of the foam. 6 to R-8 per inch, which is 45% more than mineral wool insulation. Foam sheathing can be your insulation, air barrier, and drainage plane all rolled into one. Polyiso/PU foam (like Thermax) is about twice that dense (2 lb. R-value Units. Polyiso's unique benefits include - - Highest R-value per inch. Excellent Dimensional Stability. To ensure your building is adequately insulated, the National Energy Code of Canada for Buildings (NECB) recommends meeting the following R-Values in Canada. Polyisocyanurate Rigid Insulation. Apologies to RB, whose post ended up at the top of this thread. ISO is the most expensive of all rigid insulation materials. In simple terms, R-values measure the effectiveness of insulation and a higher number represents more effective insulation. The blowing agent used to produce the polyiso foam core does not contain any CFCs, HCFCs or HFCs. High R Values Steel panels insulated foam core with a steel interior panel offer a superior thermal performance with R Values up to R-48. ACH Foam Technologies is a major manufacturer of Expanded Polystyrene (EPS) roof insulation. Rigid insulation is often used for foundations and as an insulated wall sheathing. With an R-value of 6. Reclaimed Polyiso would be expected to have a marginally lower R-value than new material. Once fiberglass insulation gets wet (and it will get wet, due to condensation) it will lose R-value!Water trapped between fiberglass insulation and the exterior of a building will also cause mold, fungus growth, rust and oxidation - Conditions that will degrade the metal and shorten the service of the structure. Special design consideration must be made in systems that cycle frequently. EPS, such as Insulfoam EPS and R-Tech branded products, is a rigid and tough, closed-cell foam that provides about R 4. Insulation Depot does not warranty the R-value of its reclaimed insulation. 25 Density Type VIII, White Face one side, Foil on the other, UL Listed, R-Value 2. /cubic foot Polyisocyanurate Foam Sheets are best suited for moldless pattern-making and for sandwich core applications where insulation is a factor. 20 ⁄₃₂ inch 2. 2RSI is the metric expression of R-value (m2 • K/W). Our calculator helps you measure what r value for exterior walls you mayy be looking for, as well as for different applications. EPS ranges in R-values from 3. Insulation is measured by its “R value” per square inch – the higher the value, the more effective the insulation. If you are placing an air gap in your walls, this will give you a double dose of insulation bringing the value up to R-7. ₁ Building Science Corporation - Info 502: Temperature Dependence of R-Values in Polyisocyanurate Roof Insulation 4/11/2013. This type of rigid foam usually comes with a reflective foil facing on both sides, so it can also serve as a radiant barrier. There is also debate as to what R-value per inch is the real R-value of polyiso over time. Understanding R-Values Insulation is rated by R-values. Roof attachment using heavy-duty screws and barbed plates, 6 inches O. Thermal Insulation: inch for inch, polyiso has one of the highest energy effi ciencies. Insulation Depot does not warranty R-value. This newest formulation of the company's polyiso insulation features the highest available R-value per-inch available in cold temperatures. As a result, LTTR. The 1 inch foam on the outside of the 2×8 is ok but you'll need more R value (planning on more insulation in the wall cavity?). The higher the R-value, the better it insulates. This includes 50-mil IB Roof membrane, 1/2 inch foam insulation with 2 r-value, perimeter pressure-treated wood nailer and half-roll membrane around the roof edges for wind-uplift prevention. Buying Request Hub makes it simple, with just a few steps: post a Buying Request and when it’s approved, suppliers on our site can quote. Great prices & free shipping on orders over USD50!. This type of SIP has a nominal R-value of about 4 per inch (2. It is a common insulator of walls and roofs. Please find a comparison R-value by thickness table below. Maybe the r value is accurate when the material is lab tested. 1/2” of continuous insulation greatly reduces. Johns Manville (Common: 2-in x 4-ft x 8-ft; Actual: 2-in x 4-ft x 8-ft) AP Foil R-13 Faced Polyisocyanurate Foam Board Insulation at Lowe's. 5 inch XPS EIFS 3 inch EPS EIFS 3 inch polyiso Description: NOTE: Enter description of CMU to be included in calculation output CMU Description - if. 00 per inch Polyisocyanurate. The gas has a high thermal resistance providing the insulation material a range of R-values between R-5. For example, ½-inch gypsum board weighs around 2 lbs/sq. Extruded Polystyrene Also known as 'blue-board', XPS consists of closed cells; offers improved surface roughness and higher stiffness, as well as increased thermal resistance (R-Value) at about R-5 per inch. Provide polyisocyanurate rigid insulation with a minimum total of R-35 consisting of one (1) layer of 4” thick (min. 35/inch to 5. It is top quality and the most cost effective product for your flat roof. 06 R-Value of Building Materials. Let's use the R-Value of IKO's polyiso insulation, Enerfoil TM, as an example. Closed Cell Polyisocyanurate Foam Core: Provides high R-value per inch in built-up, modified bitumen, metal roof and single ply roof systems, and utilizes an environmentally compliant blowing agent that provides high thermal insulation performance. 1 or just slightly better than the R-6 per inch for a 1-inch sample. R-Tech Fanfold EPS Foam Insulation with Foil, 1/2 thick, 1. At 25 degrees it dips to R-4. Polyiso is unique in that the R-value increases with the thickness of the foam, so three inches of polyiso has a higher R-value per inch than two inches, and polyiso remains the highest R-value per inch of any insulation available. But Polyiso/PU foam also has about twice the R-value per unit thickness, and THICKNESS is the primary limiting factor in a van upfit, so you need the thermal insulation that will provide the most R-value in the least thickness. Because you won't be able to nail or staple to the surface of polyisocyanurate insulation foam boards, you will need to frame in cement walls in basements where you install the insulation. Q: Have the physical properties of Polyiso changed? A: No. Polyiso offers increased R-Value per inch vs. •Falls in the middle of the three types of rigid-foam insulation in both cost and R-value •Used most in walls or below grade applications •Recyclable, and at about R-5 per inch, costs around 42¢ per sq. ) of new Polyiso rigid foam insulation is reported to range from 5. 5 plus the R value of two air films -- maybe R 8 altogether -- a lot. This is an even more dense and more expensive foam board insulation. Polyiso is unique in that the R-value increases with the thickness of the foam, so three inches of polyiso has a higher R-value per inch than two inches, and polyiso remains the highest R-value per inch of any insulation available. Single-layer polyisocyanurate foam roof insulation should not exceed a 2-inch (51-mm) thickness. An exclusive third-party thermal performance certification. ₂ EPS Below Grade Series 103 11/08. In simple terms, R-values measure the effectiveness of insulation and a higher number represents more effective insulation. They tested polyiso at 2" and 4" thicknesses. The new formulation is the best-performing polyiso on the market and is equipped with the highest R-value per-inch in cold temperatures. • Polyiso (PIR): Highest R/inch of all commercial insulation materials, with demonstrated toughness and durability in construction environments. Mule-Hide Poly ISO Flat insulations consist of a closed-cell polyisocyanurate foam core laminated to heavy, (non-asphaltic) glass fiber reinforced felt facers. Thermal image of a structure built without insulated sheathing. Paul With these insulation statistics in mind, it’s clear that every building needs an adequate layer of the fluffy stuff. This type of insulation is typically cheaper than foam board, loose fill and spray-applied insulation. polyisocyanurate insulation by its thickness— not R-value—based on the required R-value for specific project conditions. R-value in colder temperatures, while polyisocyanurate (polyiso or ISO) insulation R-values have been shown to decrease. Some builders working in cold climates give it an R-value of 4. 4, and an inch of closed cell spray foam insulation has an R value of 6. Codes & Compliances. removed polyisocyanurate insulation samples, with all samples demonstrating temperature dependent thermal performance. Polyiso is commonly used with a foil facing and contains an r value of 7 to 8 percent thickness. The 3M SM600L that is used in a lot van insulation projects is said to have an R value of 5. Choose from mineral wool, lime and polyisocyanurate materials designed to fire rate plumbing and ceiling tiles up to 1700 degrees fahrenheit. Adding ½ inch of rigid foam insulation (R-2 in this example) will increase a 2x6 stud wall from an effective R-15 to an effective R-17. Fiberglass insulation packs in more R-value per cubic inch than does rigid foam insulation. 1 Polyisocyanurate Rigid Foam Insulation Board. 00 per inch Polystyrene (XPS) 6. Polyisocyanurate, or Polyiso (ISO) foam has the highest R-value per inch (R-6. The higher the R-value, the better the resistance to the flow of heat (BTUs) and the better the insulation. ) x Poor—Gaps over 5% of the insulated area. 5 plus the R value of two air films -- maybe R 8 altogether -- a lot. 1 inch of polyiso foam = R-6 and let's say you lose 2000 BTU per hour through a wall insulated with it. 0 per inch; EPS Insulation: 3. The insulation value is approximately 50% of polystyrene. EPS, such as Insulfoam EPS and R-Tech branded products, is a rigid and tough, closed-cell foam that provides about R 4. Cuts easily with a knife or saw to fit in between studs, joists or rafters or screw directly on. EnergyShield has zero Ozone Depletion Potential (ODP) and negligible Global Warming Potential (GWP). 3) to sheath the walls. Rmax Polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board; R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products. 2 per inch, but it can be manufactured in thicknesses over 4 inches. 30 per square foot with a simple payback of ten years. After the mixture cools, it is cut into any desired length. Rigid insulation is usually made up of fibrous materials or plastic foams. RESISTA polyiso is an economical choice offering protection against fire, wind and mold. Traditional loose-fill insulation, such as fiberglass or cellulose, has an R value between R-2. This material meets or exceeds the requirements of ASTM C 591, Type I. Reclaimed Polyiso would be expected to have a marginally lower R-value than new material. The boards are available in several thicknesses and R-values; 1-inch and 2-inch thicknesses are common. (This equals inch space along a 14. Revised R-values NRCA has revised its longstanding design R-value recommendation for polyisocyanurate insulation by Mark S. The long-term thermal R-value (15 year avg. 2 per inch where R5. If you have a 2×4 wall, then you buy insulation that’s listed for a 2×4 wall. I have a dilemma; I bought an old ranch on Long Island (climate zone 4) with no insulation, and I vaulted the living room and den ceiling (they are next to each other). Special design consideration must be made in systems that cycle frequently. 5, and may get as high as R-8. share | improve this answer. PIR is typically paired with a black facer when used as insulation. 7-inch-thick polyiso would have been used in the roof system. 5 can achieve the same insulating value with as little as half the thickness required by alternative insulating materials. RapidLock provides a fully-adhered roofing system without VOCs or installation temperature restrictions. 20 ⁄₃₂ inch 2. Roof Insulation - EnergyGuard PolyIso Insulation as much as five times lighter in weight than many other materials with the same R-value. Continuous foam insulation – from footing to sill plate – is an effective way to reduce foundation energy loss and protect against moisture problems. 2 Contains no dyes, formaldehyde, or ozone depleting blowing agents Mandala Homes high efficiency comfort wall uses a combination of Rigid Insulation and Batt insulation to eliminate thermal bridging and enhance thermal performance. 5 per inch (R-6. 9 per inch of thickness. High quality rigid foam insulation that is properly installed will greatly improve ventilation, eliminate drastic temperature fluctuations inside the home, and protect from leaks. Typical Polyisocyanurate insulation R-Values. There are three main types of rigid foam insulation: expanded polystyrene (EPS), extruded polystyrene (XPS), and polyisocyanurate. XPS Tech Talk: Direct Facts About Sustainable R-Value Page 2. 06 R-Value of Building Materials. The reflective foil, if installed correctly, can also act as a radiant barrier (another type of insulation) that adds about R-2 to the insulating assembly. However, labeled R-value differs from in-service R-value for many insulations. Less insulation leads to thinner walls, more space, and fewer and tighter energy-losing seams - - further enhanced by the availability of larger pieces (for example, 24-foot lengths). They can be made into laminated insulation panels with variety of facings, including metal oil, plastic, paper, or plywood. Cellulose insulation R-value is R-3. The higher the R-value, the greater the insulating power. Manufacturer Product Name R / inch Perms R Max Thermasheath-3 (Polyiso with facer) 6 < 0. The Polyiso Edge A material's resistance to water vapor is determined by testing the product via 6ASTM E⁁‾, a measure of water vapor transmission, resulting in permeance ratings (perms). Foam structure in board thickness in excess of 2 inches (51 mm) can contribute significantly to dimensional stability. 6 per inch: $1 to $1. 54 cm) to 4 inches PARATHERM POLYISOCYANURATE INSULATION. A rigid roof insulation panel composed of a closed-cell polyisocyanurate foam core bonded to glass-reinforced felt (GRF) facers. With an R-value of 6. 9 per inch of thickness. A 1 1/2-inch-thick polyisocyanurate board typically is needed as the bottom layer for uplift resistance and fire ratings. 6 to 5 R-values per inch range with mineral wool falling in the 3 to 4. According to NRCA, polyisocyanurate's in-service R-value is 5 in a heating climate, so the roof would need 5 inches of insulation at an R-value of 5 per inch to achieve an overall R-value of 25. This includes 50-mil IB Roof membrane, 1/2 inch foam insulation with 2 r-value, perimeter pressure-treated wood nailer and half-roll membrane around the roof edges for wind-uplift prevention.