Make sure the roof is in good shape. Inspect for missing and loose shingles. "Ice, rain, snow, and wind combined with rapidly changing temperatures and humidity wreak havoc on roofs," says Jay Butch, Director, Contractor programs for CertainTeed Roofing. "Your roof is your first defense in protecting your home. It’s better to proactively deal with repairs in the fall than to discover a leaky roof during a snowstorm."