Trees, snow and cold on a Redding roof
Redding is hill country with an unbroken tree canopy, and that canopy is the main thing acting on its roofs. Oaks and maples drop limbs in ice storms and summer wind, pile leaves into valleys and gutters, and shade north slopes so they stay damp and grow moss. The elevation brings more snow than the shoreline towns and keeps it longer, so ice builds at the eaves, especially above unheated porches and on capes with shallow attics. Repeated freezing and thawing through late winter works at every cut edge and flashing joint. The few open fields and ridge tops get wind, which lifts tabs on the exposed slopes.

