Mesa enforces the Arizona-adopted International Energy Conservation Code, which encourages reflective roofing in low-slope commercial construction. Climate zone 2B applies, prioritizing summer cooling load reduction over winter heat retention.
New commercial low-slope roofs in Mesa must meet IECC reflectance and emittance thresholds (typically 0.65 initial reflectance and 0.75 emittance) or use a weighted U-factor alternative. Residential roofs are not mandated to be reflective but qualify for SRP and Mesa Utilities cool roof rebates. The Building Safety division within Development Services reviews roof assemblies during permit issuance. Existing roofs are not retroactively required to be reflective — the rule applies at new construction or major roof replacement.
Permit denial or stop-work orders apply if roof assemblies fail to meet IECC reflectance values; corrective re-roofing is required before final inspection.
Mesa, AZ
Mesa pursues urban heat island reduction through cool pavement pilots, parking lot shade requirements in the Zoning Ordinance, and tree canopy goals. Summer ...
Mesa, AZ
Mesa requires a building permit for residential and commercial solar panel installations. The city follows a streamlined solar permitting process consistent ...
See how other cities in Maricopa County handle cool roof requirements.
See how Mesa's cool roof requirements rules stack up against other locations.
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