Calculating Attic Insulation R Value

Insulation calculation once you have determined which r value you need you can calculate how much insulation you need. 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.

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Wear a dust mask gloves and a long sleeved shirt when working with insulation.

Calculating attic insulation r value.

Department of energy website. 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.

Input length width and desired r value of the area to be insulated. Inspecting your attic insulation. Refer to the project guide for more information on determining the right r value for your home. Insulation level are specified by r value.

Input depth of existing blown in insulation in inches. Go to the energy savers insulation page on the u s. This calculator is to be used as an estimating tool only. Click the button to calculate the depth in inches and pounds of total insulation required for this job.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. 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. Recommended home insulation r values. The table below shows what levels of insulation are cost effective for different climates and.

The higher the r value the better the thermal performance of the insulation. Access the attic through the pull down ladder already installed in your home or with a stepladder placed so you can. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. 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.

Fiberglass and other insulation. For more detailed information on insulation in your part of the country and recommended insulation r value for attics walls and floors. Click the button to calculate the depth in inches and pounds of total insulation required for this job. 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.

Click the button to calculate the approximate r value for this job. Input length width and desired r value of the area to be insulated. 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.

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