An Ice dam is when Ice melts and pools behind hanging icicles on your roof. This causes water to recess and backs up under your roof shingles. Eventually, that water can leak through your ceiling, causing damage and other issues to the roof and interior walls. We here at Schauer's Hardware in Forest Park want to help you prepare and prevent this issue. Armed with a little more knowledge, you will be ready to conquer the ice, once and for all.