Attic Insulation R Values Inches

R value is a measure of insulation s ability to resist heat flow.

Attic insulation r values inches.

R values of common types of insulation. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. The r value of the insulation for every inch of thickness depends on the type of insulation. For more detailed information on insulation in your part of the country and recommended insulation r value for attics walls and floors.

The recommended r value for attic insulation in ontario is between r 50 and r 60. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Achieving greater r values in exterior walls. The higher the r value the better the thermal performance of the insulation.

Input depth of existing blown in insulation in inches. Recycled glass or sand that s melted and spun into fibers. Add the right kind of insulation. The higher the r value the better the thermal performance of the insulation.

Insulation levels are specified by r value. For example a wall with 3 fiberglass batting r value of 10 8. Go to the energy savers insulation page on the u s. The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches.

The higher the r value the better the thermal performance of the insulation. Your home s age if your home is more than 10 year old you likely need more insulation. 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. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. The table below shows what levels of insulation are cost effective for different climates and. Insulation level are specified by r value. Click the button to calculate the approximate r value for this job.

R value is a measure of insulation s ability to resist heat traveling through it. Recommended home insulation r values. 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. This calculator is to be used as an estimating tool only.

There are many ways to retrofit a home with fiberglass and. Cellulose insulation has a baseline r value of 3 8 per inch.