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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.
Note from this chart that the ideal r value differs for each part of your home.
Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Professional installers and diyers also can use blown in fiberglass insulation in an attic to achieve nearly any r value.
How much insulation should you install.
Where you live different climates require different insulation r values.
This calculator is to be used as an estimating tool only.
Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.
Fiberglass insulation for most projects comes in batts and rolls with r values ranging from r 8 to r 49.
Spray foam pink fiberglas vs.
R value is a measure of insulation s ability to resist heat traveling through it.
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 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 such cases where r value is assigned this may decrease the r value requirement for batt insulation.
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.
Chart courtesy of energy star.
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.
As a benchmark one inch of solid wood has an r value of 1.
Input length width and desired r value of the area to be insulated.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
