You’re eager to improve the comfort of your home, and R-value, you’ve been told, is your first stop. For most homes, the best place to start insulating will be the attic or the foundation walls.But with thermal imaging, you may discover entire wall sections uninsulated, or places where old insulation has settled. In other words, you can achieve good performance with any type of insulation. Priced at under $150, they can reduce heating or cooling loss in a home by 20 percent annually. Insulation R-value depends on a number of factors including thickness, density and what the insulation is made of. The difference now comes down to cost, the amount of cavity space you have available: Are you building with 2x4 inch or 2x6 inch framing? Vacuum insulated panels have the highest R-value, approximately R-45 (in U.S. units) per inch; aerogel has the next highest R-value (about R-10 to R-30 per inch), followed by polyurethane (PUR) and phenolic foam insulations with R-7 per inch. Loose cellulose, fibreglass (both blown and in batts), and rock wool (both blown … 1-10 of 10. The higher the calculated number value the more effective the insulating material will be at preventing heat transfer. What does insulation ‘HD’ mean? The common denominator among varieties of insulation is the R-value. Polyiso Insulation Thickness R-Value Chart: Understanding R-Value Thursday, December 13 2018 What Does R-Value Mean? Note that the mineral wool industry has taken some heat lately for mining practices in obtaining raw materials, but we’re hoping they’ll make adjustments toward sustainability. Fiberglass(blown): 2.2 – 2.9 2. Roofing Material R-Values: Insulation or other Building Material 9: R-Value 1: Density 2: Perm 3: Absorption 4: Flame Spread 5: Smoke 6: Toxicity 7: Aging Effects & Comments: Roofing: Asphalt shingles: 0.44 30,40 : Roofing: built-up 3/8" thick plies: 0.33 30 : Roofing: wood … Using the chart as a reference, check which insulation material you have. In this case, the higher the R-value, the better the insulation is. It’s a loud, messy job, but affordable and effective. If it resists the flow of heat well (has a high r-value) then it’s a good insulating material. Zone Attic Floor Wall; Uninsulated Attic Existing 3-4 Inches of Insulation Uninsulated Floor Uninsulated Wood-Frame Wall Insulated Wood-Frame Wall 1 R30 to R49 R25 to R30 R13 * N/A 2 R30 to R60 R25 to R38 R13 to R19: 3 R19 to R25 * and add R5 insulative wall sheathing beneath the new siding : 4 R38 to R60 R38 R25 to R 30: Add R5 … However, not all insulations are made the same. The R-valuesprimary measure is the insulation materials ability to prev… Customers … It measures the temperature variation over insulation and also the amount of heat transferred through the insulating material. Understanding Insulation R-Values . (These will be patched when you’re done.). In general, rigid insulation R value is higher than that of other materials used as insulators. With the help of thermal imaging, cellulose can be “blown in” behind walls through a series of small holes in either the interior or exterior walls. © 2020, Green Builder Media. The table below shows what levels of insulation are cost-effective for different climates and locations in the home. These factors include your geographic location and type of heating system used. Lowe's Home Improvement lists My Lists. The number indicates essentially how fast heat was transferred … Along with knowing the R-value of a particular insulation, it is also important to calculate the R-value of a total system. They typically have exterior “envelopes” that allow fewer air changes per hour, so the wall “system” does not rely as heavily on insulation. It’s available in blown-in products for both walls and attic cavities, and many manufacturers have changed their manufacturing method so that the tiny fibers are less irritating to the skin, making it easier to apply and more DIY friendly. An R–Value rating is given to insulation in order to measure its thermal resistance with the standard measurement given in square metre kelvin per watt. Shop Savings Services Ideas. R-Value Chart. It’s not about how much heat the insulation retains, but how slowly it allows heat to move through it. For example, a wall with 3 ½” fiberglass batting (R-value of 10.8 - 11.9) may have an overall R-value of nearly 14 because of siding, sheathing and drywall. In a home with a $3,000 annual heating bill, that’s a savings of $600 in the first year alone. Some brands of cellulose, such as Greenfiber, include a high percentage of recycled post-consumer waste. Research has shown that you probably need a lot more insulation up there than you think. As a benchmark, one inch of solid wood has an R-value of 1. The higher the R-Value the better the thermal performance of the insulation. A higher R-value means that the insulation will do a better job of holding in conditioned air, whether that’s heat in the winter or cool air in the summer. Here’s the chart you’re looking for, but before you choose a product strictly on R-value, read on. Matt Power, Editor-In-Chief. Locate Your Climate Zone To Determine Insulation R-Value For houses in the northeastern United States or other colder areas, you might need attic insulation with an R-value as high as R-60. Find a Store Near Me. Perhaps the most common retrofit use of fiberglass is adding inches of insulation to your attic floor. Fiberglass(batts): 2.9 – 3.8 3. Last page loaded, no next page available. Insulation R Value by Zone Chart. The chart also gives common types of insulation and their R-value. The importance of the quality of your home's insulation system. But spray foam has other benefits. First page loaded, no previous page available . Glass Fibre for example, can appear in … Are you willing to consider parallel wall construction to achieve super high R-values in your walls? If the R-value is followed by ‘HD’ it means the product is a high density insulation … The ability to reduce the flow of heat is … In comparison, an inch of blown fiberglass insulation has an R-value of 3.1 - 3.4 and an inch of blown cellulose … All rights reserved. Thermal resistance is the measurement of heat or temperature difference as heat tries to flow through that element … #168562; MHIC #132308; MI #272000011; NC #71281; NJ #13VH06165800; NY, Rockland Cty. The R-Value of an insulation is representative of the materials ability to resist heat flow. Try the R-value calculator available through Oak Ridge National Laboratory. Insulation is designed to help keep buildings warmer when it's cold by keeping heat inside, and cooler when it's warm out by keeping hot air out. The same is true for different … Insulation R-Values by location, heat type, and area 1 Showing 1 to 6 of 36 entries Spray foam will also be used to seal radon out of basements, and it has been shown to nearly double the hurricane resistance of older roofs. Here are the R-values per inch of the most common types of insulation: 1. An expert on building science, Matt Power has covered construction practices for nearly 30 years, winning dozens of awards for editorial excellence. As a benchmark, one inch of solid wood has an R-value of 1. Editor’s Note: This article was originally published January 21, 2015. Spot and seal any leaks for best results. As always should you have any questions or require any assistance in planning your spray foam insulation job please contact us, we are always happy to help! The chart below outlines the R-Value recommendation for different areas in your home, as well as the various zones outlined by energystar.gov. How do you determine the amount of … As Green Builder’s Editor-in-Chief for nearly 10 years, he continues to urge builders and homeowners to new levels of performance and innovation. R-value is a measurement that rates how resistant a product is to heat flow, measuring the ability of heat to transfer from one side of an object to another. Finally, there is no set standard for insulation in an area. ceiling insulation R value, R value for walls and more. R-Value is a measure of insulation’s ability to resist heat traveling through it. If you would like to reprint this content, you are free to extract a short excerpt (no more than 1/4th of the total article), as long as you 1. credit the author, and 2. include a live link back to the original post on our site. High R value insulation is that which blocks heat transfer relatively efficiently, compared to other types of insulation. An R-value is, in short, a number that tells you how good a material is at resisting the flow of heat. The … It has many of the same characteristics of fiberglass, with the additional “super power” of extreme heat and flame resistance. Of course, I’m assuming here that you’ve opted for traditional stick framing, not structural insulated panels or insulated concrete forms, which are both sound alternatives. For houses in a southwestern state or other areas with generally warmer temperatures, you might need attic insulation with an R-value of only R-30. Here’s a little closer look at that range for each material per inch. Understanding Insulation R-Values and why they are important. This website uses cookies to ensure the best user experience. Man with a drill . When building new, your insulation options open up significantly. How to calculate the R-value of you home and what the value means. … It is never seen and rarely does one think about it. Just keep in mind this calculator does not factor in drywall (R-value .45). It has been updated and republished with new information to reflect changes in technology and products. The R value is a measure of how well an insulation slows down or blocks heat transfer under specific laboratory conditions. They are followed closely by polyisocyanurate (PIR) at R-5.8, graphite impregnated expanded polystyrene at R-5, and expanded polystyrene(EPS) at R-4 per inch. Keep in mind, there is a range because different brands may have a different R-Value. If you’re intrepid, you can rent a blower from a big box store, buy many bags of the compressed cellulose fiber, and blast it into your walls and ceiling cavities. The chart below outlines the R-value recommendation for different areas in your home for the zones outlined by energystar.gov and the furnace heat source you have. Here’s the chart you’re looking for, but before you choose a product strictly on R-value, read on. By this calculation, the … MyLowes Sign In. While often overlooked, insulation is essential to a comfortable and energy efficient home. New wall sheathings with taped seams, taped housewrap, spray-on housewrap, and other innovations reduce leakage overall, and spot application of sealants and foam seal penetrations effectively. Insulation values based on location and heat type (helpful charts included). This article is the exclusive property of Green Builder Media. SHOP ALL INSULATION Share: categories. #H-20019; Columbus, OH #HIC03284; PA #076686; RI #16788; TN #75071; VA #2705157137; WI #DC-012000102; WV051266. In other words, the attic cap can pay for itself in energy savings in just three months. So, we test our insulated metal panels to show these values to our customers. For an un-insulated attic, you will need an R-value of 49-60; For areas with 3-4 inches of existing insulation, you will need an R-value of 38-49; … Several factors determine how much or how little insulation you need. To determine the current R-value of your insulation, follow these three easy steps: Step 1: Determine the type of insulation you have. After about R-38, however, your return on investment for additional insulation begins to slow, so don’t think you can just piling it on. i.e. These R-values are a sum, meaning this should be the total R-value once you add up the entire depth of insulation. For a home in a wildfire-threatened area, it may be the logical choice. Adding rigid foam board, such as DuPont/Dow Styrofoam. Insulation R-Value Chart. As you can see above, each of the materials represented has different R-Values. Insulation R-Value means the thicker the insulation, the more efficiently it reduces heat loss. Foam(sprayed): 3.6 – 8.2 As you can see, there’s some variation in R-value depending on the particular type and brand of products used. Use the insulation R-value per inch chart to learn about common insulation materials and their common R-value per inch of thickness. 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