What causes ice dams
An Ice Dam is a thick ridge of ice that can form at the edge of your roof and in the gutter. As snow above the dam melts, water backs up underneath the shingles and leaks down through the wall and ceiling, causing major damage. Keeping the temperature of the attic under control can prevent ice dams. Proper insulation and ventilation are major components of maintaining perfect conditions in the attic as well as the roof deck.