© 2000-2020 Home Depot Product Authority, LLC. Help & Advice > Product Guides > Insulation. Most garage-door insulation has an R-value of between R-8 and R-12, because it is so thin to fit the space. However, cellulose is inexpensive, environmentally friendly and easy to install behind finished walls. Insulation R-value depends on a number of factors including thickness, density and what the insulation is made of. Crawlspaces: Next to attics and exterior walls, crawlspaces and basements have the most potential for heat transfer. Typically, a higher insulation R rating means better climate control and better energy efficiency for your home. For every type and material of insulation, check the R-value per inch of thickness that the manufacturer has listed. Zones 3 and 4 include the Midwest and Northern regions, requiring R-10 to R-19 values. Find your zone on the map and then use the above insulation R-value chart to determine the level of insulation you need to properly insulate your attic, walls, floors and crawlspaces. You can achieve better thermal performance in your attic by adding an additional layer of insulation. The common denominator among varieties of insulation is the R-value. Zones 5–8: Add R5 to R6 insulative wall sheathing beneath the new siding. Here are the most common insulation materials listed in order of lowest to highest R-value: 1. Insulation R-values vary based on the type, thickness and density of the insulation material. The general rule is that the higher the R-Value, the better the insulation material. And then there’s the issue of how the R-value … that open-cell spray foam provides. The Winner: Tied (the R-value … Cavity Wall Insulation Technique (Determining What is the Best House Insulation) Polyurethane foam has the highest R-value (6.5/inch thickness) of all the spray-in insulation, but it is … Cincinnati, Ohio, is located in Zone 4, a fact that could affect the type of insulation you choose. An R-value is a rating which measures how well insulation can resist heat flow. For example, if your attic already has fiberglass insulation blankets installed, you can improve its R-value by installing blown-in cellulose insulation on top of the blankets. Cellulose: Loose-fill cellulose is rated between R-3.2 and R-3.9per inch, making it one of the least efficient insulation materials available. The duct insulation R-values I mentioned above are what’s on the product label. All Rights Reserved. Make sure your home is properly insulated in all these locations. with ENERGY STAR. Add Insulation to Attic. Your home doesn’t necessarily need the highest R-value insulation. If you had a home without any insulation, and you had money to insulate one area of it to an R-5, of course the attic would be the most important place to spend the money. Rigid Foam Insulation. You only nee… Tiny air particles trapped in insulation … Local store prices may vary from those displayed. The other option is … For example, if you have a type of insulation that has an R-value of R-5 per inch of thickness, you will need a depth of 6-inches of this insulation installed in your attic to reach R-30 if you live in Zones 2 or 3. If you insulate your attic to an R-30 but do not insulate … Also included is the hugely helpful insulation zip code calculator that spells out the suggested amount of R value … The map above shows each region of the U.S. and the Department of Energy’s corresponding climate zone. The Department of … R-value measures how well building insulation can prevent the flow of heat into and out of the home. Closed-cell spray foam has a higher insulation value: about R-6 per in., as compared to R-3.7 per in. Basement: Check rim joists and unfinished basement walls and compare depth with an R-value … R30 to R49. The table below shows what levels of insulation are cost-effective for different climates and locations in the home. Aerogel is an extremely good thermal insulator, which at a pressure of one-tenth of an atmosphere has an R-value of R-20 per inch of thickness, compared to R-3.5/inch for a fiberglass blanket. Insulation level are specified by R-Value. Wall Insulation - Whenever exterior siding is removed on an: Learn how to take action today and Rule Your Attic! R-Value is a measure of insulation's ability to resist heat flow. Rigid foam insulation offers as much as double the R-value of traditional fiberglass batts, according to the United States Department of Energy. Is R13 insulation good for exterior walls, though? No matter the insulation material, whether its glasswool or foam, the same R-value will give … R-30x16" Unfaced (for standard attic application 9.25" thick) R-38x16" Unfaced (for highest attic batt application 12" thick) Floor. Please call us at: 1-800-HOME-DEPOT (1-800-466-3337), Please enter in your email address in the following format: you@domain.com. Use of this site is subject to certain Terms Of Use. Be sure that these areas are also adequately insulated. While this could be … ‘R’ stands for thermal resistance. In comparison, an inch of blown fiberglass insulation has an R-value … The ideal attic insulation R-value is different than the ideal wall insulation R-value. How often do you think you get the full labeled R-value? In such cases where R-value is assigned this may decrease the R-value requirement for batt insulation. Once you find your home’s zone on this map, you can use the below insulation R-value chart to determine the minimum R-value your insulation should have. Here are the installation methods from lowest to highest average R-value per inch: Note that the material the insulation is made from will change the R-value as well. A higher insulation R-value … Products shown as available are normally stocked but inventory levels cannot be guaranteed, For screen reader problems with this website, please call 1-800-430-3376 or text 38698 (standard carrier rates apply to texts), Achieving Greater R-Values in Exterior Walls. The recommended level … This guide will teach you everything you need to know about insulation R-values so you can better insulate your home. Recommended insulation levels for retrofitting existing wood-framed buildings. As with attics or anywhere else in your home, adding more layers of insulation to your exterior walls is key to having a higher R-value and better thermal performance. Uninsulated Attic. Higher R-value = Better insulation; Why is a higher R-value better? To translate all of this in to “RV Speak,” R-value is a measurement used for insulation. Ceiling: Enjoy better floor-to-floor climate control in your home by installing. Typical recommendations for exterior walls are R-13 to R-23, while R … An R-value is, in short, a number that tells you how good a material is at resisting the flow of heat. Insulation R-values vary based on the type, thickness and density of the insulation material. The R-value of insulation does not signify how well insulation controls moisture. Higher R-value means greater insulation performance, and thus more savings on your next heating and cooling bill. Insulation ratings are measured in R-values per inch of thickness. R-value denotes the capacity of an insulating material to resist heat flow. Included is our R value guide, detailing the suggested amount of insulation dependent upon zone, as provided by the U.S. Department of Energy. Garage: Better temperature control in your garage means you can safely store more items and protect your car from overly hot or cold temperatures. Note from this chart that the ideal R-value differs for each part of your home. Installed faced … Water heater and water pipes: Adding insulation to your water heater can reduce standby heat losses by 25- to 45-percent, which in turn reduces your energy bills. Even with a really nice installation, as in the photo in Image #2 below, there’s usually compression at the supports. Polyurethane rigid foam is a … The R-values of both insulations will accumulate. The R-value your insulation needs depends on your local climate. The best R-value depends on the typical temperature fluctuations in your city or state, but average R-value recommendations for attic spaces range between R-30 to R-49. You can mix the type and material of insulation too. Home Depot lists R13 as the low end of the recommended ‘r’ value for walls. 0.87 / inch. Depending on where you live and the part of your home you’re insulating (walls, crawlspace, attic, etc. Tip: Radiant barriers and vapor barriers are not rated by R-values. Existing 3–4 Inches of Insulation. Foam board insulation is easy to install between wall studs and over existing blanket insulation. See all. The Best Insulating Rigid Foam. R-Value is a measure of insulation’s ability to resist heat traveling through it. It is normally noted (for example) “6.5 per inch“; it means applying one inch thickness of the material will provide 6.5 R-value; applying two inches will provide 13.0 R-value; and so on.R-value … Again, the ‘r’ value you need depends on where you live. It's best … Wrapping hot water pipes in tubular insulation will also help reduce loss in water heat. 1. One option is to use polyurethane rigid foam insulation; it is available with R-values ranging from R-18 to R-28 at a 3½-inch thickness. R-value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. An R-value tells you how well a type of insulation can keep heat from leaving or entering your home. For example, your roof insulation might have an R-value of 20 but combined with the batts and other materials, your roof’s R-value might only be 15 or 10. The basic types of foam board insulation include: polystyrene, polyurethane or polyisocyanurate. Types of Residential Insulation Suited for Cold Climate. R-value level depends on a number of things such as the type of material, its density and thickness. This adds insulation to the garage door without impeding its functionality. The higher the … If it resists the flow of heat well (has a high r-value) … Q: Which type of … Fiberglass Insulation – This type of insulation material is widely available and comes in various shapes and sizes. Typically, a higher insulation R rating means better climate control and better energy efficiency for your home. Your choice in R-value depends on your … The higher the R-value, the greater the insulating power. The higher the R-Value, the better the thermal performance of the insulation. Seal gaps around windows and doors with spray foam insulation. These R-values are a sum, meaning this should be the total R-value once you add up the entire depth of insulation. A higher insulation R-value usually means a higher price point as well. Zone. Advice, tools, resources and inspiration to help you save energy, What to Look For: DIY Checks and Inspections, Look for ENERGY STAR Certified Insulation, Basement & Crawlspace Air Sealing and Insulating Project, Sealing Behind Window & Door Trim Project, A Do-It-Yourself Guide to Sealing and Insulating with ENERGY STAR, Learn how to take action today and Rule Your Attic! The key to R-value is minimizing the thermal conductivity of insulating materials. Insulation levels are specified by R-Value. If your insulation gets wet, this decreases the R-value of the insulation, reducing its effectiveness at controlling heat flow. The R=0.87 value for the first value in this Air R-value table subsection: -does not consider internal convection effects. Extremely northern regions and high elevations are zone 5, requiring R-15 to R-19 values. The higher the R-Value the better the thermal performance of the insulation. -does not consider … Insulation ratings can be improved by adding more layers of insulation. For Zones 4 to 8: Add R5 insulative sheathing before installing the new siding. Energy Starrecommends different insulation levels based on where you live. There are three basic foam insulation board products on the market produced under several different manufacturer names. Floor. If you don’t have all the tools you need to install insulation and improve your insulation R ratings yourself, consider our tool rental services. As a benchmark, one inch of solid wood has an R-value of 1. R25 to R30. If it isn't at least 19 inches deep, add more. R-19x15" Unfaced (for standard floor 6.25" thick) *Please keep in mind these are general building code recommendations. In addition to attics and exterior walls, you can get greater R-values for your home by remembering to insulate these areas as well: Now that you understand insulation R-values, you can make sure your home is properly insulated. ), you’ll need a different R-Value. However, dampness can influence R-value. Need Help? Attic: Slide a yardstick or tape measure into the existing insulation. with ENERGY STAR, Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding, and, Zones 3–4: Add R5 insulative wall sheathing beneath the new siding. 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