I have done some calculating and I believe that I am right but I have found from working on sites before that dumpsters always have a way of filling up with more material than originally planned since there are air gaps (not to mention others helping you fill it at night).
I have 22 sq of shingles and tar paper to remove for yet another DIY project. I figure that a 9 yd hopper should do the job but I wanted to see if anyone had any first hand info.
I was working for a contractor about 10 yrs ago for a summer job and we did a roof about the same sq size as this house and he got a ~4 yd hopper and we filled it twice. The reason I want to know is yes I don't want to go way too big and pay more than I have to and not use the space. On the other hand I don't want to be held up on the job waiting for the dumpster to get emptied so that I can finish tear off.
If you have any experience with this please include a price you paid and the and the size. I'll help me gauge if things are in the ball park.
Thanks