This application uses the equations that are laid out in the SMACNA handbook. It should be used to calculate required gutter size, downspout size, and downspout spacing for your roof perimeter. Please Note: This calculator should serve as an information source only. Metal-Era, Inc. assumes no responsibility for problems which may arise from using this calculator and recommends that you verify all data obtained. For further assistance, please email us at email@example.com or call 800-558-2162.
1600 Airport Road
Waukesha WI 53188