Cool Roofs and Title 24

Cool roofs can cut building owners' energy costs. Because cool roofs gain less heat than normal roofs, they reduce the need for air conditioning making buildings more comfortable to the people inside.

aerial view of Solano County Government Center Cool roofs have other benefits, too. For building owners they can cut maintenance costs and increase the life expectancy of the roof. And for society in general, cool roofs can even help to reduce the urban heat island effect that makes our cities hotter and produces unhealthy air.

Because cool roofs save both money and energy, in October 2005 they became part of the prescriptive requirements of California's energy code, the Title 24 Building Energy Efficiency Standards. Most cool roof materials for low-sloped roofs are white or another light color. Because steep-sloped roofs are often visible from the ground, however, roofing material manufacturers have developed popular roof colors other than white that will still reflect or emit the sun's energy away from the building.

Cool Roof Resources

Commercial Reroofing

Steps to Help Decide if a Cool Roof is Right for You (Acrobat file)

Sample Forms to Meet Building Criteria

Cool Roof Rating Council

The Cool Roof Rating Council (CRRC) is an independent organization that lists the solar reflectance and thermal emittance specifications for many roofing products. CRRC is a valuable resource for building officials; energy service providers; architects and specifiers; property owners and community planners - anyone seeking to improve the energy efficiency of their buildings.


Find financial incentives offered by your local utility.

Additional Sources for More Information