Cool Roof Technology: How Reflective Roofing Saves Energy in Phoenix
· 9 min read
In a city where air conditioning accounts for up to 60% of summer electricity bills, cool roof technology offers Phoenix homeowners a proven way to dramatically reduce energy costs. Learn how reflective roofing works, which options are available, and how much you can save.
What Makes a Roof 'Cool'?
A cool roof is any roofing system designed to reflect more sunlight and absorb less heat than a standard roof. The science behind cool roofs centers on two measurable properties: solar reflectance and thermal emittance. Solar reflectance (also called albedo) measures how much solar energy a roof surface reflects back into the atmosphere rather than absorbing as heat. A standard dark asphalt shingl…
Cool Roof Options for Arizona Homeowners
Arizona homeowners have multiple cool roof options across every major roofing material category. Reflective roof coatings are one of the most accessible cool roof strategies, particularly for existing flat roofs. Elastomeric acrylic coatings, silicone coatings, and aluminum-pigmented coatings can be applied over existing roofing materials to dramatically increase solar reflectance. White elastomer…
Energy Savings Data for Arizona Homes
The energy savings from cool roofing are not theoretical — they are well-documented through extensive research and real-world measurements in Arizona specifically. Studies conducted by the Oak Ridge National Laboratory, Lawrence Berkeley National Laboratory, and Arizona State University have consistently demonstrated significant cooling cost reductions from cool roof installations in the Phoenix m…
Utility Rebates and Incentive Programs
Arizona utility companies recognize the grid-level benefits of cool roofing and offer incentive programs that further improve the economics for homeowners. Arizona Public Service (APS) has offered cool roof rebates through their energy efficiency programs, with rebate amounts varying by program year and roof type. SRP (Salt River Project) similarly provides energy efficiency incentives that may ap…
Frequently Asked Questions
How much can a cool roof save on energy bills in Phoenix?
Cool roofs typically reduce cooling costs by 15-25% for Phoenix homeowners. With average summer electricity bills of $300-$500 per month, that translates to $45-$125 per month in savings during the cooling season. Over a roof's lifespan, cumulative savings can reach $5,400-$26,250.
Do cool roofs work with tile roofing in Arizona?
Yes, light-colored concrete and clay tiles qualify as cool roof products. Some manufacturers offer tiles with specially engineered reflective surface treatments that increase solar reflectance beyond what standard light-colored tiles achieve. Tile's natural thermal mass combined with cool roof reflectance provides excellent energy performance.
Are there rebates for cool roofs in Arizona?
APS and SRP have offered energy efficiency rebates that may apply to qualifying cool roof installations. Federal tax incentives may also be available for Energy Star-rated roofing products. Program details and amounts change periodically — Simply Roofing stays current on all available programs and helps homeowners maximize their incentives.
Can I add a cool roof coating to my existing roof?
Yes, reflective elastomeric or silicone coatings can be applied over many existing roofing materials, including flat roofs, metal panels, and some shingle types. Coatings cost $1.50-$4.00 per square foot and can increase solar reflectance to 0.70-0.85, providing cool roof benefits without full roof replacement.
Do cool roofs only come in white?
No, modern cool roof technology is available in a wide range of colors. Cool-rated shingles use specially engineered ceramic-coated granules that reflect infrared radiation while maintaining traditional colors including browns, grays, and greens. Even darker-colored cool products reflect significantly more solar energy than standard products of the same color.