Calculating Attic Insulation R Value

Inspecting your attic insulation.
Calculating attic insulation r value. Input depth of existing blown in insulation in inches. Click the button to calculate the approximate r value for this job. Recommended home insulation r values. For more detailed information on insulation in your part of the country and recommended insulation r value for attics walls and floors.
Wear a dust mask gloves and a long sleeved shirt when working with insulation. This calculator is to be used as an estimating tool only. Insulation savings calculator use this insulation savings calculator to measure the financial impact of increasing your insulation performance. 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.
R value is a measure of insulation s ability to resist heat traveling through it. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. To find the r value of the existing insulation in your attic multiply the number of inches of insulation by the r value for your particular type. The table below shows what levels of insulation are cost effective for different climates and.
Click the button to calculate the depth in inches and pounds of total insulation required for this job. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. Go to the energy savers insulation page on the u s. Access the attic through the pull down ladder already installed in your home or with a stepladder placed so you can.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. Insulation calculation once you have determined which r value you need you can calculate how much insulation you need. The higher the r value the better the thermal performance of the insulation. Input length width and desired r value of the area to be insulated.
Enter your data into the fields where indicated. How to calculate existing r value in an attic 1. This calculator is to be used as an estimating tool only. Refer to the project guide for more information on determining the right r value for your home.
Department of energy website. This calculator is to be used as an estimating tool only. Fiberglass and other insulation. Click the button to calculate the depth in inches and pounds of total insulation required for this job.