Attic Insulation R Value Chart Canada

Chart courtesy of energy star.

Attic insulation r value chart canada.

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.

In such cases where r value is assigned this may decrease the r value requirement for batt insulation. As a benchmark one inch of solid wood has an r value of 1. 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. Where you live different climates require different insulation r values.

Insulation level are specified by r value. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. 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. Recommended home insulation r values.

The table below shows what levels of insulation are cost effective for different climates and. The higher the r value the better the thermal performance of the insulation. 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.