If you've heard a contractor mention "Title 24" and nodded politely, here's what they meant: California's energy code has opinions about your roof, and when you replace it, those opinions can apply. The good news — compliance is mostly about picking the right product, and the right products aren't ugly anymore.
The gist
Title 24 wants roofs that reflect more sun and shed heat faster — "cool roofs" — to cut air-conditioning load. Whether it applies to your re-roof depends on your climate zone, your roof's slope, and how much of it you're replacing. Inland valleys (the hot zones) see the strictest application; coastal zones get more slack. Your contractor and your city's permit desk make the final call — and yes, a real re-roof should be permitted.
Materials that pass without drama
- Cool-rated asphalt shingles: the major brands all make CRRC-rated lines now — they look like normal shingles, not spaceships.
- Tile: clay and concrete are natural overachievers here — the air gap under every tile is built-in insulation, and many blends carry cool ratings.
- Metal: the poster child. Reflective Kynar finishes turn summer attic temps from brutal to bearable.
What it means for your wallet
Cool-rated versions of a product typically cost little or nothing more — the real cost is picking a contractor who doesn't know the code and fails inspection. Ask your bidder how they handle Title 24 in your city; a confident, specific answer is a good-roofer tell. Need one of those? Our referral has you covered, and the counter can tell you exactly which in-stock products carry the right ratings for your zone.
Written by the counter crew at South Coast Shingle — supplying Southern California roofing & masonry since 1946. Questions? Long Beach (800) 540-7626 · Laguna Niguel (800) 580-7626.