What is an ice dam? An ice dam is when melting snow re-freezes at the edge of your roof and can prevent any water or snow from draining off the roof. This can cause water to make its way under the shingles and into your home. In New Jersey and other states with cold winters, this can be a real problem. Immediate steps you can take: -Clear downspouts. Make sure the area around your downspouts is clear. This way your gutters will be sure to drain once the snow begins to melt, preventing flood...