In zone 3 the average minimum requirement for attic insulation is 9 inches of r30 fill.
Insulation amount in attic.
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.
The average recommended level is 17 inches of r60.
Learn more about attic insulation in these how to videos or at energystar gov.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Find out where to buy knauf insulation here.
The main factors that impact the cost are.
Insulation input length and width of area to be insulated.
Type and material of your insulation.
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Square footage of your attic.
In zone 4 the average minimum requirement for attic insulation is 11 inches of r38 fill.
Inspecting your attic insulation first things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job.
The average recommended level is 17 inches of r60.