Ten years is young for most pitched roofs and middle-aged for some flat roofs. The material, how the roof was installed and how it has been looked after tell you more than the date on the permit.
How far through its life is a 10-year-old roof?
| Roof type | Typical Bay Area lifespan | At 10 years |
|---|---|---|
| Architectural asphalt shingle | 22–28 years | Less than halfway |
| Concrete tile | 40–60 years (underlayment often around 25) | Early in its life |
| Clay tile | 60–100 years | Early in its life |
| Standing-seam metal | 40–70 years | Early in its life |
| TPO single-ply (flat) | 18–25 years | Around the middle |
| Built-up tar and gravel (flat) | 15–20 years | Past the middle |
National estimates are similar. InterNACHI’s life-expectancy chart lists about 20 years for 3-tab shingles, 30 for architectural shingles and 20 for modified bitumen, and says the figures are guidelines, not guarantees. Our local figures are in how long a roof lasts in San Francisco.
When is a 10-year-old roof already a problem?
- Granules in the gutters or bare patches. Early granule loss can point to a product or installation problem.
- Leaks at flashing. Flashing, pipe boots and sealant can fail long before the roofing does, especially on a roof where old flashing was reused.
- Blisters, splits or ponding on a flat roof. Standing water shortens a membrane’s life quickly.
- Rusted fasteners and flashing near the ocean. Salt air in the Sunset and Richmond can corrode exposed metal within 8–12 years.
- A hot or damp attic. Poor ventilation ages shingles from underneath.
Does roof age matter when buying, selling or insuring?
Home inspectors note roof age, and insurers often ask for it. In San Francisco you can usually confirm when a roof was replaced from the reroof permit in the property’s DBI permit history. If the age is unknown, an inspection report with photos is the next best record.
What should I do with a 10-year-old roof?
Keep the gutters and drains clear, trim branches back, and have the roof looked at after a hard storm season. Our answer on how often to have a roof inspected gives a schedule. Fix small things while they are small: a cracked pipe boot is a quick roof repair, while ignoring it can mean wet decking later. A free roof inspection tells you how much life your roof has left, and our roofing in San Francisco page covers the city’s common roof types. If the roof is failing early, we will say so and explain your roof replacement options.
Related services and local pages
Sources
- InterNACHI: estimated life expectancy of home components
- San Francisco Department of Building Inspection
Rules and maps change; confirm requirements for your address with your city or county building department.
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