Ice Dams: Causes, Prevention, and Solutions for Damaging Roof Ice Buildup

Ice damming—when snow melts on a warm area of roof and flows down until refreezing on a colder area—can ruin roofing, sheathing, and non-weather-resistant materials below. Keep this from happening to your home with this guide to preventing and eliminating ice dams.

Map of recommended insulation levels
Fig. 2: Recommended insulation levels for houses, by region.
DON OSBY