Cool climates with significant precipitation and snowfall like The Greater Rochester Area can present specific challenges to roofs. Cool, damp environments may allow moss, algae, mold and fungi to develop. In significant snowfalls, roofs that are aging or aren’t properly insulated can experience ice dams and resulting damage to the home’s interior. Roofs may fail simply due to snow load—the weight of snow. This is particularly true for porches and overhangs, for example.