Attic Insulation R Value Chart Canada

Chart courtesy of energy star.

Attic insulation r value chart canada.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3. In general to optimally isolate an attic on average an r value of the insulation is required ranging from r 50 to r 60. The amount of insulation recommended for your home will vary depending on a number of factors.

Where you live different climates require different insulation r values. As a benchmark one inch of solid wood has an r value of 1. Recommended home insulation r values. The insulation levels of an attic or of any part of a house are understood through the r value that is the value with which the insulating material is resistant to heat flow.

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. Note from this chart that the ideal r value differs for each part of your home. Insulation level are specified by r value.

You will need a higher r value of insulation if you live in the northeast than if you live in southern. The table below shows what levels of insulation are cost effective for different climates and. 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.