Cool-roof rules in Jacksonville come from the Florida Building Code Energy Conservation chapter, not city ordinance. Low-slope commercial roofs in Climate Zone 2 must meet minimum solar reflectance and thermal emittance values certified through Cool Roof Rating Council labels.
Jacksonville sits in ASHRAE Climate Zone 2A, which the Florida Building Code Energy Conservation (FBC-EC) treats with cool-roof prescriptive paths under Section C402.3. Low-slope roofs on new commercial buildings must achieve a three-year-aged solar reflectance of at least 0.55 and thermal emittance of 0.75, or a Solar Reflectance Index (SRI) of 64. Steep-slope residential roofs follow IECC R402 prescriptive options or the performance path. The City's Building Inspection Division (Ord. Code 250) verifies CRRC labels at permit. Florida House Bill 1281 preempts local fuel-source rules but not energy-code amendments adopted via the Florida Building Commission process.
Failing to meet FBC-EC cool-roof prescriptive values without an approved performance-path tradeoff blocks certificate of occupancy. Building Inspection requires a corrective re-roof or compensating envelope upgrades. Florida statute Sec. 553.781 governs penalties and contractor discipline through DBPR.
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See how Jacksonville's cool roof requirements rules stack up against other locations.
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