California's Title 24, Part 6 Building Energy Efficiency Standards includes cool roof requirements for new and existing buildings.
California’s Building Energy Efficiency Standards for Residential and Nonresidential Buildings (Title 24, Part 6) contain requirements for the thermal emittance, three-year aged reflectance, and Solar Reflectance Index (SRI) of roofing materials used in new construction and re-roofing projects.
The requirements apply to new construction, additions, and alterations (including roof recoverings) on nonresidential (including motel and hotels and relocatable public school buildings), multifamily buildings, and single-family residential buildings. The requirements vary based on climate zone, building type, roof square footage, and roof slope (low or steep).
Any roofing product used for compliance must be rated and labeled by the CRRC (see section 10-113 of Title 24, Part 6).
The roofing requirements can be found in the following sections of the 2022 Title 24, Part 6 standards
Section 10-113(a, b) (Mandatory Certification and Labeling of Roofing Product Reflectance and Emittance)
Section 110.8(i) (Mandatory Insulation, Roofing Products & Radiant Barriers)
Section 140.1 (Performance Approach: Energy Budgets (Nonresidential));
Section 140.2 (Prescriptive Approach (Nonresidential));
Section 140.3(a)1 (Prescriptive Requirements for Building Envelopes (Nonresidential));
Section 140.3(a)8 (Prescriptive Requirements for Relocatable Public School Buildings);
Section 141.0(b)2B (Additions, Alterations, and Repairs to Existing Nonresidential)
Section 150.1(c)11 (Performance and Prescriptive Compliance Approaches for Single-Family Residential Buildings);
Section 150.2(b)1I (Energy Efficiency Standards for Additions and Alterations to Existing Single-Family Residential Buildings – Alterations - Prescriptive);
Section 150.2(b)2 (Energy Efficiency Standards for Additions and Alterations to Existing Low-Rise Residential Buildings – Alterations – Performance Approach;
Section 170.2 (Prescriptive Requirements for Multifamily New Construction)
Section 180.1(a,b) (Prescriptive Requirements for Multifamily Additions and Alterations)
For more information on Title 24, please visit https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards. You can also contact the California Energy Commission by phone (800) 772-3300 (toll-free in California) or 916-654-5106 (outside California) or email [email protected]
* The below resources are not official Title 24 documents. Please refer to the actual code for the requirements.
2022 Title 24, Part 6 Roofing Requirements Summary Chart (CRRC Reference Document)