Snow usually arrives in Englewood a few hours before the morning it intends to ruin, and the lots along Palisade Avenue have to be open by the time the first cars turn in. Top Roof, Commercial & Residential runs the storm from its dark side — plowing lots and driveways, clearing walks, entries and steps, laying salt where the melt will refreeze after sundown. Storefronts and houses want the same thing at six a.m.: bare pavement, sure footing, nothing to think about. A drive nobody had to worry over is a small, complete piece of work. Then the next band comes up the valley and it begins again.