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Home > By DEPARTMENTS > Green Operations > California Environmental Compliance > California Title 24

New Title 24 Regulations Aug 1, 2009

Energy efficiency is almost second nature for doing business in California. For example, in California, commercial buildings with flat roofs have been required to have white roofs since 2005.

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Beginning August 1, 2009, updated Title 24 standards take effect, new residential roofs and retrofits in California will be required to have “cool-colored” roofs.

2008 Standards for Residential and Nonresidential Buildings - Effective August 1, 2009

Get the details in the official updated Title 24 documents: (Download PDF)

Find smaller chunks of information at Title 24/2008 Building Energy Efficiency Standards Toolkit

Cool Roofs

These roofs are about half as effective as white roofs but still reflect a higher fraction of the sun’s rays than current roofing materials of the same color.

The California Energy Commission (CEC) approved dozens of changes to the state’s building energy efficiency standards for new construction, commonly known as Title 24. The updated rules are expected to cut California’s peak energy demand by 129 megawatts (MW) in just their first year in effect, according to the CEC. Among the updates for new homes, are requirements for better insulated, heat-reflecting windows and “cool roofs” that, by staying up to 40 degrees cooler than a normal roof under the hot afternoon sun, reduce air conditioner demand and can cut a homeowner’s electricity consumption by as much as 20%. A significant change for businesses is a requirement that warehouses starting at 8,000 square feet — down from 25,000 square feet under existing rules — must install skylights to take advantage of daylighting and cut electricity consumption.

More Title 24 Standards Coming January 1, 2010

The requirement for when the 2008 standards must be followed is dependent on when the application for the building permit is submitted. If the application for the building permit is submitted on or after 1/1/10, the 2008 standards must be met.

The Energy Commission adopted the 2008 changes to the Building Energy Efficiency Standards for a number of reasons:

1. To provide California with an adequate, reasonably-priced, and environmentally-sound supply of energy.

2. To respond to Assembly Bill 32, the Global Warming Solutions Act of 2006, which mandates that California must reduce its greenhouse gas emissions to 1990 levels by 2020.

3. To pursue California energy policy that energy efficiency is the resource of first choice for meeting California's energy needs.

4. To act on the findings of California's Integrated Energy Policy Report (IEPR) that ...

Standards are the most cost effective means to achieve energy efficiency

Expect the Building Energy Efficiency Standards to continue to be upgraded over time to reduce electricity and peak demand, and recognize the role of the Standards in reducing energy related to meeting California's water needs and in reducing greenhouse gas emissions.

5. To meet the West Coast Governors' Global Warming Initiative commitment to include aggressive energy efficiency measures into updates of state building codes.

6. To meet the Executive Order in the Green Building Initiative to improve the energy efficiency of nonresidential buildings through aggressive standards.

Edited by Carolyn Allen, owner/editor of California Green Solutions
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