Mountains or Mole Hills?

The workers finished the roofing job over the sunroom. However, I had to cart away all the leftover shingles, tar paper and whatever else they threw down. Hard hat area! With each loaded wheelbarrow of roofing material, I wondered just how much was actually up there as the pile I created became quite large! A very, very rough guesstimate (and likely overestimated) of the roof's area would be 220 sq ft. With the shingles all flush and flat on the roof, I thought the pile of waste would only be a couple of feet wide and no more than a foot tall. Little did I know just how much lay *beneath* those shingles! The resulting mole hill turned into a mountain at least 6'x4'x2'. Carting the waste to the local recycling center required a number of trips! Plus, I had already diligently stacked the waste in boxes to maximize space. I thought I was going to throw my back as I didn't realize just how heavy roofing material really is. That was a rough lesson. Had I known the amount of work before me, I would have strategized the waste removal differently from the very beginning of the roofing job. =(