A good friend purchased a HUD home a few weeks ago and he needed some help on his roof. Most of the house had already been re-roofed, but one section 25' by 43' still needed to be redone. As you can see, we tore off the old shingles and patched some holes in the roof decking, laid new tar paper, and then I proceeded to run all the new shingles, while the homeowner addressed the ridge vent and wall/valley flashing. We finished in time for me to leave for a wedding by 3pm, and the homeowner was able to get the flashing done before it rained the next day. It was the hottest day of the year so far, and if i stood still for more than a few seconds I would stick to the shingles.
Note to self, friends don't let friends buy shingles at Lowes.