To make any roof plan:

1. Draw the overall plan of the building with dotted line at locations where there are overhangs.
   
2. Create ridges at desired location (often halfway)
   
3. Create hips. These will bisect corners. If corners are square, then hip will be at a 45° angle.
   
4. Divide by number of feet of total rise and draw contours representing 1' rise.
   
5. Draw valleys at intersections of contours.
   
6. Draw overhangs as needed.