Attic Insulation R Value Chart Canada

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.

Attic insulation r value chart canada.

As a benchmark one inch of solid wood has an r value of 1. In such cases where r value is assigned this may decrease the r value requirement for batt insulation. How much insulation should you install. 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. Chart courtesy of energy star. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. The amount of insulation recommended for your home will vary depending on a number of factors.

Note from this chart that the ideal r value differs for each part of your home. Recommended home insulation r values. Where you live different climates require different 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.

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