How do they compare?
| Asphalt shingles | Metal | |
|---|---|---|
| Estimated life (InterNACHI) | About 20 years (3-tab) to 30 (architectural) | 40 to 80 years |
| Fire rating (CDI) | Most qualify as Class A | Metal shingles and sheets qualify as Class A |
| Relative cost | Lower | Well above asphalt (Cost vs. Value) |
Sources: InterNACHI, CDI Safer from Wildfires.
When is metal worth it?
If you'll stay long enough to benefit from its life, you're in a fire-exposed area, or you're adding solar and don't want to remove panels again. Standing seam needs a minimum slope of 1/4:12 (CRC R905).
When are shingles the better pick?
For most homes on a typical budget, or when the neighborhood or HOA expects them. Architectural shingles last longer than 3-tab.
Do cool-roof rules apply?
In climate zones 4 and 8 to 15, qualifying steep-slope reroofs need a rated cool product, which both materials offer (CEC). See cool roof rules and metal roof cost.
For your actual price, request a free written estimate: a licensed roofer measures the roof and prices your exact scope.
Every roofer we work with is licensed, insured and highly reviewed by Bay Area homeowners.
Get a free replacement quoteFrequently asked questions
Is metal roofing worth it in California?
It can be if you'll stay a long time or face fire risk; it costs well above shingles.
Are both metal and shingles Class A?
Most asphalt shingle roofs and metal shingles or sheets qualify as Class A, per the CDI. Check the product listing.
Do metal roofs need a certain slope?
Standing seam needs a minimum slope of 1/4:12 under the California Residential Code.
Sources
- InterNACHI: life expectancy of roofing materials
- CDI: Safer from Wildfires
- Cost vs. Value report
- California Residential Code R905
- CEC: cool roofs
Sources reviewed November 12, 2026. Figures are published estimates and official fees, not quotes. Confirm prices, permits and requirements with your contractor and building department. This page is general information, not legal or insurance advice.