Attic Insulation R Values Inches

Go to the energy savers insulation page on the u s.

Attic insulation r values inches. The higher the r value the better the thermal performance of the insulation. There are many ways to retrofit a home with fiberglass and. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. R values of common types of insulation.

The table below shows what levels of insulation are cost effective for different climates and. The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches. Add the right kind of insulation. For example a wall with 3 fiberglass batting r value of 10 8.

Recommended home insulation r values. Achieving greater r values in exterior walls. Cellulose insulation has a baseline r value of 3 8 per inch. The higher the r value the better the thermal performance of the insulation.

Recycled glass or sand that s melted and spun into fibers. Where you live different climates require different insulation r values. You can achieve better thermal performance in your attic by adding an additional layer of insulation. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

For more detailed information on insulation in your part of the country and recommended insulation r value for attics walls and floors. 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. Insulation level are specified by r value. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need.

R value is a measure of insulation s ability to resist heat traveling through it. Input depth of existing blown in insulation in inches. The higher the r value the better the thermal performance of the insulation. The r value of the insulation for every inch of thickness depends on the type of insulation.

R value is a measure of insulation s ability to resist heat flow. Your home s age if your home is more than 10 year old you likely need more insulation. The recommended r value for attic insulation in ontario is between r 50 and r 60. Insulation levels are specified by r value.

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. This calculator is to be used as an estimating tool only.