Cool Roof Requirements: Irvine vs Mission Viejo
How do cool roof requirements rules compare between Irvine, CA and Mission Viejo, CA?
Irvine and Mission Viejo have similar restriction levels.
Irvine, CA
Orange County
California Title 24 Part 6 energy standards require cool roof reflectivity for most new and replacement low-slope roofs in Orange County's climate zones 6, 8, and 10, covering all cities and unincorporated areas.
View full Irvine rules →Mission Viejo, CA
Orange County
California Title 24 Part 6 energy standards require cool roof reflectivity for most new and replacement low-slope roofs in Orange County's climate zones 6, 8, and 10, covering all cities and unincorporated areas.
View full Mission Viejo rules →Key Facts Comparison
| Fact | Irvine | Mission Viejo |
|---|---|---|
| Code | CA Title 24 Part 6 | CA Title 24 Part 6 |
| OC zones | 6, 8, 10 | 6, 8, 10 |
| Trigger | 50% roof replacement | 50% roof replacement |
| Certification | CRRC rated product | CRRC rated product |
Highlighted rows indicate differences between cities.
Irvine FAQ
Does my asphalt shingle roof need to be reflective?
Steep-slope residential requirements vary by climate zone. Many zones allow standard shingles; check the current Title 24 prescriptive table or use a performance compliance path.
Are minor roof repairs covered?
Repairs under 50 percent of the roof area generally do not trigger Title 24 cool roof requirements, but local jurisdictions may apply stricter rules.
Mission Viejo FAQ
Does my asphalt shingle roof need to be reflective?
Steep-slope residential requirements vary by climate zone. Many zones allow standard shingles; check the current Title 24 prescriptive table or use a performance compliance path.
Are minor roof repairs covered?
Repairs under 50 percent of the roof area generally do not trigger Title 24 cool roof requirements, but local jurisdictions may apply stricter rules.
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