Ice Dams: What They Are and How to Prevent Them Ice dams are a common winter roofing problem caused by uneven roof temperatures. When heat escapes from your home and melts the snow on the roof, the water runs down to the edges and refreezes, creating a dam. This blocks further melting snow from draining properly, leading to water pooling and potential leaks into your home. How to Prevent Ice Dams: Improve Insulation: Proper attic insulation keeps warm air inside your home and prevents…