R value is a measure of insulation s ability to resist heat traveling through it.
Calculating attic insulation r value.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
R value measures how well certain building insulation materials can resist heat.
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.
Know exactly how much you need with our project calculators.
Insulation level are specified by r value.
How to calculate existing r value in an attic 1.
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.
Go to the energy savers insulation page on the u s.
Department of energy website.
Click the button to calculate the approximate r value for this job.
Recommended home insulation r values.
The table below shows what levels of insulation are cost effective for different climates and.
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.
When determining how much insulation you need don t guesstimate calculate.
Input depth of existing blown in insulation in inches.
The higher the r value the better the thermal performance of the insulation.
This calculator is to be used as an estimating tool only.