Cool Roofs

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BE COOL!

California Building Energy Efficiency Standards state that replacements, recovering or recoating of the exterior surface of existing nonresidential low-sloped roofs shall meet certain requirements where more than 50 percent or more than 2,000 square feet of roof, whichever is less, is being replaced, recovered or recoated. The complete roof standards appear in Sections 118 (i), 143 and 149 of the State of California's Building Energy Efficiency Standards. New standards will take effect January 1, 2010.

In addition to true cool roof shingles, lighter colors of standard asphalt shingles are also more environmentally friendly than black shingles.

Cool Roof Code Requirements

Energy Commission Cool Roof Brochure

Mandatory cool roof requirements

 

What is a Cool Roof?

A cool roof reflects and emits the sun's heat back to the sky instead of transferring it to the building below. "Coolness" is measured by two properties, Solar Reflectance and Thermal Emittance. Both properties are measured from 0 to 1, and the higher the value, the "cooler" the roof. For more information, visit the Cool Roof Rating Council’s web site at http://www.coolroofs.org/

  

Cool Roof Diagram

 

Outside Links

U.S. EPA Heat Island Effect

U.S. EPA Cool Roofs

California Energy Commission Consumer Energy Center

Lawrence Berkeley Labs Heat Island Group

Global Cool Cities Alliance Cool Roof Toolkit - NEW

Coat 'N' Cool

Cool Roofs Brochure 

 

Links to State Resources

Title 24 Energy Hotline 
    800-772-3300 
Building Energy Efficiency Standards
    www.energy.ca.gov/2006publications/CEC-400-2006-015/CEC-400-2006-015.PDF.Title Free Title 24 Energy Information Videos 
    www.energyvideos.com 
Trade-off Calculator 
    www.asphaltroofing.org/title24_reroof.html
Cool Roof Rating Council 
    www.coolroofs.org; 866-465-252 
Approved Title 24 Nonresidential Compliance Software 
    EnergyPro:  www.energysoft.com 
    Perform 2005: call or email Title 24 Hotline
Title 24 Website 
    Title 24 Energy Standards and support documents - 
    www.energy.ca.gov/title24
Energy Commission Cool Roof Website  
    www.energy.ca.gov/title24/coolroofs/index.html
Blueprint, the Energy Commission Newsletter on T24 Questions and Answers 
    www.energy.ca.gov/efficiency/blueprint

 

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