Mark is the most dependable worker that I've ever met in the zone. If he says that he's going to put a new roof on a house by a certain time, it's as good as done-and he has a girlfriend that will back his every play. Case in point; one of Mark's employees calls in sick, so Debbie climbs up and starts tacking down tarpaper then works the nailgun on the shingles. And yes, they finished on time.