Select the ASHRAE standard you would like to meet: ASHRAE 90.1 - 2004 ASHRAE 90.1 - 2007 ASHRAE 90.1 - 2010* (Proposed)
Select the desired R-value for your roof system: Click to Select an R-value 15 meets requirement 16 meets requirement 17 meets requirement 18 meets requirement 19 meets requirement 20 meets requirement 21 meets requirement 22 meets requirement 23 meets requirement 24 meets requirement 25 meets requirement
Enter the square footage of your roof:
