Attic Insulation R Value Chart Canada

In general to optimally isolate an attic on average an r value of the insulation is required ranging from r 50 to r 60.

Attic insulation r value chart canada.

Where you live different climates require different insulation r values. The table below shows what levels of insulation are cost effective for different climates and. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Recommended home insulation r values.

Insulation level are specified by r value. 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. The higher the r value the better the thermal performance of the insulation. 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.

You will need a higher r value of insulation if you live in the northeast than if you live in southern. The amount of insulation recommended for your home will vary depending on a number of factors. 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. How much insulation should you install.

Note from this chart that the ideal r value differs for each part of your home. R value is a measure of insulation s ability to resist heat traveling through it. Foam plastic insulation on the interior of the building envelope must adhere to the requirements of protection of foamed plastics as per 9 10 17 10 of the national building code of canada.