Berkeley requires cool-roof products meeting California Energy Code Title 24 reflectance and emittance thresholds on most low-slope reroofs, supporting the citys heat-island mitigation goals.
California Title 24 Part 6 mandates cool-roof products on most non-residential and multifamily low-slope reroofs, with prescriptive aged solar reflectance and thermal emittance values. Berkeley enforces these requirements through its Building and Safety Division during reroof permit review. Steep-slope residential reroofs have lower reflectance thresholds but still trigger product-rating documentation. The Berkeley CAP and 2024 update encourage voluntary cool-roof upgrades in single-family homes through BayREN rebates. Roof products must carry a Cool Roof Rating Council label, and contractors submit CF-1R compliance documents at final inspection.
Reroofs failing Title 24 inspection cannot pass final permit closeout; uncorrected work blocks certificate of completion and may be cited as building-code violations under BMC Title 19.
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