R values of common types of insulation.
How many inches of insulation attic.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your.
In zone 2 the average minimum requirement for attic insulation is 9 inches of r30 fill.
How much does attic insulation cost.
For loose fill cellulose this translates to a total depth ranging from 8 inches.
We ll walk you through the steps to help you find the right type of fiberglass attic insulation and the right amount.
If it s a new building simply reference the energy code map.
This calculator is to be used as an estimating tool only.
You can do it yourself for about 500.
Fiberglass and cellulose insulation have r values of 2 9 to 3 8 per inch while sprayed foam insulation can go as high as 8 0 per inch.
Blown in insulation overview.
The average recommended level is 17 inches of r60.
The higher the r value the better job the insulation does at preventing the transfer of heat.
Inspecting your attic insulation.
The higher the r value the better the thermal performance of the insulation.
In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.
The recommended r value for attic insulation in ontario is between r 50 and r 60.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
How well a particular insulation works is expressed by the r value which ranges from 2 0 to 8 0 per inch of insulation.
The r value of the insulation for every inch of thickness depends on the type of insulation.
Input length width and desired r value of the area to be insulated.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Depending on type you will need somewhere between 10 and 18 inches of insulation to meet the recommended insulation values.
In zone 1 the average minimum requirement for attic insulation is 9 inches of r30 fill.
If you need to add insulation in your attic save big by blowing in cellulose insulation yourself.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
The average recommended level is 14 inches of r49.
First you ll need to determine your r value.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Add the right kind of insulation.
How much insulation in attic for zones 1 4.
The pros charge 1 500 to 2 000 to do a 1 200 sq ft.