After a Morris County storm the Madison rooftops hold their snow in long white shelves, and ice gathers at the eaves where the winter sun never quite reaches. Miller & Sons Roofers LLC works the cold side of a property — clearing snow, opening driveways and walks, salting the paths where the melt refreezes overnight. Storms here often start as snow and finish as something meaner, so the job is as much about the second day as the first. A driveway opened end to end and a walkway you can cross without thinking: that is the whole goal, plainly stated. Cold work, and it earns its keep the moment a car backs out without slipping.