If you've gotten a roofing quote in Costa Mesa, Newport Beach, or anywhere in Orange County in the last few years, you've probably seen the words 'Title 24' or 'cool roof' in the line items. Here's what's actually going on — and why we don't fight it.
What Title 24 requires
California's Title 24, Part 6 energy code sets minimum solar reflectance and thermal emittance values for roofing materials on residential re-roofs that replace more than 50% of the existing roof. In OC's climate zones, a low-slope roof generally needs an aged SRI of 64 or higher; steep-slope roofs need an aged SRI of 16 or higher (with several compliance paths).
What it looks like in real materials
On asphalt shingle re-roofs, we usually spec GAF Timberline HDZ Reflector Series or Owens Corning Duration Cool — they meet Title 24 in their standard color palettes and look identical to a non-cool shingle from the curb.
On tile, most concrete and clay tiles already meet the steep-slope threshold by default. On standing-seam metal, light-color Kynar finishes easily clear the bar.
Why it actually matters
A cool roof shaves real attic heat — 15–25°F on a hot Mesa Verde or Quail Hill afternoon. That translates to lower AC bills, longer-lived HVAC equipment, and a more comfortable upstairs. It's one of the few code requirements that pays you back.
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