The Bay Area’s mild, marine-influenced climate is actually kinder to roofs than most of California. Surface temperatures rarely exceed 130°F on shingles (vs 160°F+ in Sacramento or the Central Valley), and our UV index is lower because of marine layer cloud cover. That extends shingle life by 3–6 years on average.
Typical lifespan we see in the field, by material:
- Architectural asphalt shingle: 22–28 years
- Concrete tile: 40–60 years (underlayment usually fails first, at ~25 years)
- Clay tile: 60–100 years
- Standing-seam metal: 40–70 years
- TPO single-ply (low-slope/commercial): 18–25 years
- Built-up tar & gravel: 15–20 years
What shortens roof life in our microclimate: coastal salt air (degrades exposed fasteners and aluminum flashings within 8–12 years), tree debris (acidic redwood and oak leaves trap moisture against shingles), and skylight curb leaks that go unnoticed during the dry season.
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