Slip a strip of adhesive ice-and-water barrier (available where roofing repair products are sold) under the soffit/main roof ...

Clean the gutters regularly and install double layers of ice and water barriers to avoid icicle and ice dam formation.

Ice dams form when snow on a roof melts and refreezes at the edges, creating a barrier that traps water. That water can seep into homes, damaging ceilings, insulation, and walls. In some cases ...