Attic Insulation R Values Inches

You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Attic insulation r values inches.

R value is a measure of insulation s ability to resist heat traveling through it. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. R values of common types of insulation. Cellulose insulation has a baseline r value of 3 8 per inch.

The recommended r value for attic insulation in ontario is between r 50 and r 60. Go to the energy savers insulation page on the u s. Insulation levels are specified by r value. Your home s age if your home is more than 10 year old you likely need more insulation.

R value is a measure of insulation s ability to resist heat flow. The higher the r value the better the thermal performance of the insulation. The higher the r value the better the thermal performance of the insulation. For example a wall with 3 fiberglass batting r value of 10 8.

Input depth of existing blown in insulation in inches. The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches. Where you live different climates require different insulation r values. Insulation level are specified by r value.

The table below shows what levels of insulation are cost effective for different climates and. Recommended home insulation r values. Add the right kind of insulation. The higher the r value the better the thermal performance of the insulation.

Achieving greater r values in exterior walls. There are many ways to retrofit a home with fiberglass and. Recycled glass or sand that s melted and spun into fibers. 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.

For more detailed information on insulation in your part of the country and recommended insulation r value for attics walls and floors. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. This calculator is to be used as an estimating tool only. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Click the button to calculate the approximate r value for this job.