California Title 24 Part 6 sets cool-roof solar reflectance and thermal-emittance minimums for low-slope and steep-slope roofs. San Jose reach codes under SJMC Chapter 17.84 layer additional efficiency requirements on new construction and major reroofs.
California Energy Code Title 24 Part 6 requires cool-roof products on most low-slope nonresidential and high-rise residential roofs, with minimum aged solar reflectance of 0.63 and thermal emittance of 0.75. Steep-slope residential roofs in Climate Zone 4, which covers San Jose, require aged reflectance of 0.20 with prescriptive triggers at major reroofs. CALGreen Title 24 Part 11 adds voluntary tier measures, while SJMC Chapter 17.84 (Reach Code) applies additional efficiency margins on new construction. San Jose Department of Planning, Building and Code Enforcement reviews compliance via plan check and field inspection. Cool-roof product certification follows Cool Roof Rating Council labeling.
Permits for non-compliant roofing assemblies are denied at plan check. Installation of non-rated materials triggers correction notices, re-inspection fees, and refusal to issue final approval until certified products are installed.
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