Water damage due to an ice dam during a winter weather thaw in Hamden, CT. After the recent snowstorms, we've received many phone calls from people with water damage due to ice dams in their homes. A roof leaking water into your structure’s interior walls, ceilings and floors is not a pretty picture. Ice dams are a leading culprit for water leaks during the winter season. They form when heated air melts roof snow above and behind the dammed up ice. When the trapped water cannot safely flow or run off the roof, it can backflow under the roof's shingles and into the structure's interior areas. This homeowner had water leaking down through walls. SERVPRO had to cut the affected walls under the windows to prevent mold from developing; protecting the hardwood floor.