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R-Value is a measure of insulation’s ability to resist heat traveling through it. The higher the R-Value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost-effective for different climates and locations in the home. Learn how to take action today and Rule Your Attic! with ENERGY STAR.
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. These R-values are a sum, meaning this should be the total R-value once you add up the entire depth of insulation.
Does your attic insulation measure up? How much insulation should you install? The amount of insulation recommended for your home will vary depending on a number of factors: Where you live —Different climates require different insulation R-values.
Recommended R-values for the attic range from R30 to R60. Here is the full DOE’s recommended attic insulation R-value chart: In this chart, you can notice that colder states (Zone 7, Zone 6, Zone 5, Zone 4) all have the recommended R60 attic insulation.
The range of R-values of insulation materials spans from materials with R-10 insulation values per inch like vacuum insulated panels and silica aerosol to below R-1 values per inch like bricks, glass, and poured concrete.
evaluate your house’s current R-value and recommend whether additional R-value is needed and appropriate types of insulation. The table opposite suggests R-values by zone as indicated in the map of the United States. It also suggests R-values when adding insulation to uninsulated or under-insulated attics, crawl spaces, and walls. Further ...
Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. Use the JM insulation calculator to determine the recommended R-value for your project, as well as how much insulation you’ll need.
Here is the DOE’s recommended attic floor R-value insulation chart: You can check the full climate zones US map here. Looking at the floor R-values at different climate zones, we can clearly see that: In southern states, you need lower floor R-values.
According to Green Builder magazine , some brands of attic door insulation can cut air infiltration by 70 percent. Priced at under $150, they can reduce heating or cooling loss in a home by 20 percent annually.
You can use the following table to estimate the required insulation R-value for common components in your ... CEILING R-VALUE IN AN. UNINSULATED ATTIC. WOOD FRAME WALL R-VALUE FOR UNINSULATED 2X4 WOOD-FRAME WALL: 1: R30: R13 or R0 + R10 CI* 2: R49: R13 or R0 + R10 CI: 3: R49: R20 or R13 + R5 CI or R0 + R15 CI ... The table below lists some of ...