Cold weather and moisture can cause ice dams on any roof, but the difference between traditional roofs and flat commercial roofs is that water slides off regular roofs more quickly because of their slope. On flat roofs, water tends to pool since there’s no incline. As the snow melts on the surface or after heavy rainfall, it freezes, forming an ice dam on the surface.
Eventually, sunlight melts the snow and ice on your flat commercial roof. That becomes a problem if the melt doesn’t run off the roof and into the drain pipes or gutters like it should. When pooling water has nowhere to go, it seeps into the roof’s membrane, causing severe water damage that can mean leaks and mold growth.