Ice dams in Seattle form when warm attics melt snow that refreezes at eaves, forcing water under shingles

https://telegra.ph/Keep-Your-Bellevue-Home-Dry-Through-Winter-Storms-Keep-Your-Bellevue-Home-Dry-Through-Winter-Storms-06-03-4

Ice dams in Seattle form when warm attics melt snow that refreezes at eaves, forcing water under shingles. Continuous soffit-to-ridge ventilation, air sealing, and eave ice-and-water shield stop hidden winter leaks.