Down in Waterfront South the port cranes stand against the sky like herons, and when a storm swings up the coast the sleet comes sideways off the water. R&R Roofing Services runs snow work through those nights — plowing yards and driveways, clearing lots, breaking ice loose at the doorways where the de-icer does its slow patient work. Weather that arrives off the Delaware is rarely tidy: half snow, half rain, setting up hard by four in the morning. So the truck goes back out, and out again, until the pavement gives its color back instead of holding white. Morning finds the gates open and the ground honest underfoot.