Attic Insulation R Value Chart Canada

Chart courtesy of energy star.

Attic insulation r value chart canada.

R value is a measure of insulation s ability to resist heat traveling through it. Insulation level are specified by r value. Note from this chart that the ideal r value differs for each part of your home. As a benchmark one inch of solid wood has an r value of 1.

You will need a higher r value of insulation if you live in the northeast than if you live in southern. How much insulation should you install. Where you live different climates require different insulation r values. In general to optimally isolate an attic on average an r value of the insulation is required ranging from r 50 to r 60.

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. In such cases where r value is assigned this may decrease the r value requirement for batt insulation. 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. The amount of insulation recommended for your home will vary depending on a number of factors.

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. The table below shows what levels of insulation are cost effective for different climates and. 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.