Calculating Attic Insulation R Value

Click the button to calculate the approximate r value for this job. 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. Input depth of existing blown in insulation in inches.

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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.

Calculating attic insulation r value.

Wear a dust mask gloves and a long sleeved shirt when working with insulation. How to calculate existing r value in an attic 1. Fiberglass and other insulation. Recommended home insulation r values.

Inspecting your attic insulation. The higher the r value the greater the insulation performance. Insulation level are specified by r value. Go to the energy savers insulation page on the u s.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. The table below shows what levels of insulation are cost effective for different climates and. For more detailed information on insulation in your part of the country and recommended insulation r value for attics walls and floors. 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. Department of energy website. Know exactly how much you need with our project calculators. This calculator is to be used as an estimating tool only.

When determining how much insulation you need don t guesstimate calculate. Access the attic through the pull down ladder already installed in your home or with a stepladder placed so you can. R value measures how well certain building insulation materials can resist heat.

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