How long does a roof last in cold, snowy climates?
By Best Roofing Answers · Published May 2026 · Updated July 2026
In cold, snowy climates, asphalt shingle roofs typically last close to their nominal 20–30 year range when ventilation is correct, but ice damming and freeze-thaw cycles commonly shave 3–7 years off poorly-vented roofs; standing-seam metal usually excels in snow country because snow sheds cleanly.
Ice dams are the real threat
Per DOE and IECC guidance, ice dams form when heat escapes an under-insulated or under-ventilated attic, melts snow at the ridge, and refreezes at the cold eave — pushing water backward under shingles. Homes with balanced soffit-to-ridge ventilation and R-49+ attic insulation rarely see them; older homes without either can see chronic edge leaks that shorten roof life.
IRC R905.1.2 requires an ice-and-water shield underlayment at eaves in zones with a design temperature at or below 25°F; this is one of the highest-ROI code minimums in cold climates.
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