City Of Los Angeles Cool Roof Ordinance

This page provides details about cool roof building code requirements in Los Angeles, California. For information about how to apply to the rebate program, visit the LADWP Consumer Rebate Program webpage. You can contact LADWP with rebate program questions at 1-800-374-2224.

Building Code Requirements

Starting October 1, 2014, the 2014 Los Angeles Green Building Code requires that roofing material used in residential buildings meet minimum values for 3-year aged solar reflectance and thermal emittance, or for SRI. The requirements are as follows:

ROOF PITCH

SOLAR REFLECTANCE

THERMAL EMITTANCE

SRI

Low-slope (< 2:12)

0.63

0.75

75

Steep-slope (> 2:12)

0.20

0.75

16

If the product is new and the aged solar reflectance value is unavailable, it can be calculated using the following formula:

Aged Reflectancecalculated=(0.2+ ß[pinitial – 0.2])

Where pinitial = Initial Reflectance listed in the CRRC Rated Product Directory, and

ß= 0.65 for Field Applied Coating, or 0.70 for Not a Field Applied Coating

Exceptions to the 2014 Los Angeles Green Building Code include:

  • Roof repair;

  • Roof replacements when the replacement roof area is equal to or less than 50% of the total roof area;

  • Where building-integrated photovoltaics (BIPV) are installed; or

  • Permits issued prior to January 1, 2015, for the replacement of an existing roof with asphalt roof shingles or asphalt composition roll roofing.

To find CRRC-rated products that comply with the ordinance, visit the CRRC online Rated Products Directory and search for the minimum required values using the "Minimum Radiative Properties" tab. For more information about the building requirements, review the City of Los Angeles Cool Roof Fact Sheet & FAQs [PDF] or visit www.ladwp.com.