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

https://telegra.ph/Seattles-2026-Building-Codes-What-Homeowners-Must-Know-Before-a-Roof-Replacement-Seattles-2026-Building-Codes-What-Homeowners-Mu-06-03

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.