California Title 24
2013 California Title 24, Part 6 Requirements — Understanding How It Affects You
California’s Title 24 energy standards address the energy efficiency of new construction of, and additions and alterations to, homes and commercial buildings. Since buildings are one of the major contributors to electricity demand, the goal of Title 24 is to reduce energy consumption in California for its energy future.
Effective July 1, 2014, the Title 24 Roofing Code establishes new requirements to promote the installation of “cool roofs” in low-rise residential steep slope construction. Cool roofs consist of materials that reflect the sun’s energy from the roof surface, as well as have high emissivity, allowing them to emit infrared energy. Thus, significantly reducing energy costs and urban heat islands.
Northern California Roofing Company is committed to adhering to the Energy Commissions energy standards by providing our customers with cool roof concrete tile solutions that not only meet the new requirements, but deliver the beauty, durability and value that you’ve come to expect.
How does Title 24 Impact You?
- Builders: All new permits and buildings must comply
- Architects: Must plan for the new energy efficiency requirements
- Roofers: Can differentiate by knowing the new code
Cool Roof Criteria
California is divided into 16 climate zones. Buildings located in Climate Zones 10-15 need to meet, at a minimum, the following requirement as outlined by the California Energy Commission (CEC).
Aged Solar Reflectance Index of 16
Requirements vary by zone, depending on the building and the climate method. To see which climate zone your project is in and the requirements associated with your building structure, visit the CECs website.
Re-Roof and Alterations
In Climate Zones 10-15, when 50% or more of the roof is being replaced, the Prescriptive Method must be used to meet cool roof requirements, except when:
- Home addition has less than 300 square feet of roofing
- Minimum R38 attic insulation is used, provided:
- Minimum R4 above deck insulation is used
- There is no ductwork in attic or duct insulation meets new requirements
- High profile tile is used (rise to width ratio of 1:5 when installed)
- Elevated battens are used
For new construction, the Performance Method — where you use the California Energy Commissions approved software to demonstrate compliance for the entire building — is the preferred path.
- A total building energy budget is established
- Solar Reflectance and Thermal Emittance of chosen product are entered into the software
- Trade-offs are allowed (i.e. higher efficiency windows, HVAC, etc.)
Any profile or color can be used as long as the energy budget is met.