An ice dam is an accumulation of ice at the lower edge of a sloped roof, usually at the gutter. When interior heat melts the snow on the roof, the water will run down and refreeze at the roof’s edge (where temperatures) are much cooler. Over time, the ice builds up and blocks water from draining off the roof, forcing the water under the roof and into your attic and home.
Two words to remember to avoid trouble later: Ventilation and Insulation.
Keep your attic well ventilated and keep the attic floors well insulated. This will decrease the likelihood that ice dams will form or, at least reduce their size.
Call Disaster One 24/7 if you experience water a water damage. Immediate response can save you time and money.