Icicles forming on gutters can be a sign of ice dams, a buildup of ice that can cause damage to roofs and gutters. Ice dams form when snow melts on a roof and refreezes at the edge, preventing ...

Ice dams cause roof leaks but insulation and ventilation help prevent them. A long, cold winter can leave homeowners dealing with a heavy buildup of snow and ice on their roofs. In some cases ...