The answer to 'why is my flat roof ice dams' is that ice dams are a common problem on flat roofs during the winter months. Ice dams form when snow on the roof melts, usually due to heat escaping from the home, and then refreezes at the roof's edge. This creates a barrier that prevents proper drainage, leading to water backup and potential leaks.
Some common causes of ice dams on flat roofs include inadequate insulation, poor ventilation, and clogged gutters or downspouts. Symptoms can include icicles hanging from the roof, water stains on the ceiling or walls, and visible ice buildup along the roof's edge.