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Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills*—plus, prevent major issues like ice dams in the winter.
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. Recommended insulation levels for retrofitting existing wood-framed buildings
For Zone 3 climatic locations, the average minimum insulation thickness for the attic is 9 with an R-value of 30 while the average recommended insulation thickness is about 17 inches with an R-value of 60.
How many inches of insulation is recommended for attics? The depth of insulation you need depends on your local climate and the type of material you use. For fiberglass batts, Energy Star recommends at least 13–14 inches of insulation in Southern climates (R-38) or 16–18 inches deep in Northern climates (R-49). For spray foam, you may need ...
We wanted to share a quick resource that can help you to determine what your current attic insulation level is, and a rough R-value for your current depth. It’s quick and easy, all you need is access to your attic, and a ruler or tape measure to check your insulation depth.
On average, you can save up to 20% on your home’s heating and cooling costs or up to 10% on its total energy costs by adding insulation to attics, floors, crawl spaces, and accessible basement rim joists, and by reducing unwanted air leaks all around your house.
Looking across your attic, if the insulation is level with or below the ... Either read the R-value printed on the batts of your existing insulation or use a measuring tape to measure the depth of the insulation (inches). ... The number you end up with indicates the R-value of your existing insulation. If it's less than the recommended levels ...
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. Note from this chart that the ideal R-value differs for each part of your home.
To determine the right amount of attic insulation, consider your climate zone and existing insulation. Check the U.S. Department of Energy’s R-value recommendations for your area. Measure your current insulation’s thickness and calculate its R-value.
Typically, attics are recommended to be insulated to R-38 or about 10 to 14 inches, depending on the types of insulation. Green Attic Insulation simplifies the process. Calculate the required insulation by considering the square footage, depth, or desired R-value. Consequences of Inadequate Attic Insulation.