St. Louis follows the International Energy Conservation Code adopted under Title X for new construction and major roof replacements on commercial buildings, requiring reflective or insulated roof assemblies but lacking a dedicated cool-roof retrofit mandate.
Title X Building Code adopts a current edition of the IECC. Commercial low-slope roof replacements over a defined area trigger reflectance/emittance compliance or added insulation paths under ASHRAE 90.1. Residential roofs follow prescriptive insulation tables but no albedo requirement. There is no city-funded cool-roof rebate, though Ameren Missouri energy programs and federal IRA tax credits apply. The Climate Action Plan recommends expanded cool-roof adoption to reduce urban heat-island effects on the riverfront and northside.
Permits for non-compliant low-slope commercial roof replacements are denied at plan review, and final inspection failures require corrective work before occupancy sign-off.
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See how St. Louis's cool roof requirements rules stack up against other locations.
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