How Many Inches Of Insulation Attic

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How many inches of insulation attic.

Depending on type you will need somewhere between 10 and 18 inches of insulation to meet the recommended insulation values. The recommended r value for attic insulation in ontario is between r 50 and r 60. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. How well a particular insulation works is expressed by the r value which ranges from 2 0 to 8 0 per inch of insulation.

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. We ll walk you through the steps to help you find the right type of fiberglass attic insulation and the right amount. First you ll need to determine your r value. When adding additional insulation you do not have to use the same type of insulation that currently exists in your.

If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. Input length width and desired r value of the area to be insulated. The average recommended level is 14 inches of r49. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting.

The higher the r value the better job the insulation does at preventing the transfer of heat. 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. In zone 1 the average minimum requirement for attic insulation is 9 inches of r30 fill. R values of common types of insulation.

Installing fiberglass attic insulation first time adding insulation to an attic. How much insulation in attic for zones 1 4. In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. If it s a new building simply reference the energy code map.

This calculator is to be used as an estimating tool only. Click the button to calculate the depth in inches and pounds of total insulation required for this job. How much does attic insulation cost. Inspecting your attic insulation.

In zone 2 the average minimum requirement for attic insulation is 9 inches of r30 fill. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. You can do it yourself for about 500. The r value of the insulation for every inch of thickness depends on the type of insulation.

For loose fill cellulose this translates to a total depth ranging from 8 inches. The average recommended level is 17 inches of r60. The pros charge 1 500 to 2 000 to do a 1 200 sq ft.