1. What Is California Title 24 Part 6 and Why Does It Apply to You?
If you replace more than 50% of your roof (or over 500 square feet) in Lancaster, Palmdale, or the greater Antelope Valley, California law requires your new roofing material to be certified as a "Cool Roof" by the Cool Roof Rating Council (CRRC).
Lancaster and Palmdale are classified under California Building Climate Zone 14, known for scorching 100°F+ summer peaks and sub-freezing winter lows. In contrast, our South Bay office in Gardena sits in Climate Zone 8.
The goal of Title 24 is simple: prevent roofs from absorbing radiant solar heat, which strains residential HVAC compressors and drives up Southern California Edison (SCE) power grid strain.
Steep-slope residential roofs (pitch > 2:12) must meet minimum initial SRI 20 / 3-year aged SRI 16, or aged solar reflectance ≥ 0.20 and thermal emittance ≥ 0.75.
2. How Infrared-Reflective Granules Work Without Looking White
A common misconception is that a Title 24 compliant roof has to look bright white like an industrial warehouse or commercial building.
Today, manufacturers like Owens Corning (Duration® COOL and COOL Plus), GAF (Timberline HDZ® RS), and CertainTeed (Landmark Solaris®) embed micro-engineered solar-reflective granules into rich architectural tones including Charcoal, Mojave Sand, Desert Tan, and Canyon Gray.
These granules reflect the invisible near-infrared spectrum (which accounts for over 50% of solar heat) while absorbing the visible light spectrum so your home maintains traditional aesthetic curb appeal.
3. Real-World Attic Temperature Reductions
During an August heatwave in Lancaster with ambient air at 104°F:
• Standard non-cool black asphalt roof surface: 165°F to 175°F. Uninsulated attic temperature: 140°F.
• Title 24 compliant cool shingle roof surface: 125°F to 135°F. Properly ventilated attic temperature: 108°F.
That 30°F+ temperature reduction in your attic takes immense pressure off your AC ductwork, allowing your cooling system to cycle off during peak afternoon SCE rates.
Local utilities such as SCE and clean energy programs frequently offer cash rebates for certified CRRC cool roof installations. APR Roofing handles all certificate filings.
4. The APR Roofing Title 24 Certification Guarantee
Every re-roof completed by APR Roofing includes:
• CRRC product label verification attached directly to the permit packet.
• Calculation and installation of proper NFA (Net Free Area) balanced ridge and soffit intake ventilation.
• Completed CF-1R and CF-2R energy compliance certificates signed by our CSLB license holder for final city sign-off.