roofing material takeoff

https://charlie-wiki.win/index.php/How_the_Austin_Roofing_Company_Roof_Calculator_Simplifies_Your_Project_Planning

For a roofing material takeoff, you measure every square foot of the roof plane, then figure eaves, rakes, valleys, and hips to add waste. I calculate the number of squares of shingles or panels, then list underlayment, flashing, ridge caps, fasteners, and accessories. It's detailed but keeps you from running short on a job.