What is Title 24
Title 24, part 6, of the California Code of Regulations, sets energy efficiency standards for residential and non-residential buildings. Also known as the California Energy Code, the California Building Standards Commission was created in 1978 in response to a legislative mandate to reduce California's energy consumption. Its long term goals are to provide California with an adequate, reasonably priced and environmentally sound supply of energy while conserving resources and protecting the environment.

As a result of less energy consumption, the Building Energy Standards have saved Californians more than $74 billion in reduced utility bills since being introduced 1978. The newest energy code will move California closer to achieving its zero-net-energy (ZNE) goals, whereby all newly constructed low-rise residential buildings are to be ZNE by 2020.

Photographer Denise Retallack | Architect Sanders Pace Architecture

How to Comply
Before a city or county in California will grant a building permit, a Title 24 energy report (also called Title 24 energy calculations) will need to be submitted to verify the proposed building design complies with the California Title 24 energy standards. There are two methods of compliance. Prescriptive and Performance.

  • Prescriptive Method is the simplest approach where each individual component meets the prescribed minimum energy requirement. This method is less flexible because it limits the overall number of windows and doors allowed in most climate zones and severely limits the amount of west-facing glass. This method is best recommended for simple home renovations and not generally used for new homes or large additions which could lead to over-insulation and potentially expensive energy upgrades and higher construction cost.
  • Performance Method offers the most flexibility to achieve compliance but requires a detailed account to verify the proposed building design. A specialized state-approved software program calculates the minimum level of energy efficiency necessary for compliance which allows for the relaxing of some requirements. The performance method's flexibility allows for more trade-offs, does not limit the number of windows & doors and could save considerably on construction costs.

Costs for having a consultant prepare the report for your home remodel or addition will vary depending upon the square footage.

New Energy Standards for Fenestration Products
The energy standards are updated periodically by the California Energy Commission to allow consideration and possible incorporation of new energy efficiency technologies and methods.

The updated 2013 Title 24 Building Energy Efficiency Standards have been in effect since July 1, 2014 and incorporate significant changes and stricter energy codes requirements. Please note that building permits that were issued prior to July 1, 2014 are still valid and can follow the former 2008 Title 24 codes.

Specifically, the new Title 24 Energy Code significantly increases the thermal performance required by manufacturers for all fenestration products (windows and doors). The prescriptive maximum U-factor and SHGC values have been reduced to .32 and .25 in all climate zones.

What LaCantina Doors Offers
LaCantina Doors continues to support green design and is a proud member of the US Green Build Council.  Committed to energy-conscious living, LaCantina Doors offers:

  • Dual glaze, LoE, NFRC rated glass as the standard for improved energy efficiency
  • A range of glass options, including triple glazing for greater thermal performance
  • Thermally controlled frames across our product line
  • Energy efficient material options including Aluminum Thermally Controlled Aluminum Wood, Clad and Wood
  • Compliant Folding and Sliding Door & Window options that meet with new Title 24 prescriptive requirements

Who Benefits
Homeowners and the environment will benefit the most as a result of these new energy efficiency standards. With a projected annual energy use reduction of approximately 30% among new homes, Californians will save at least $100 million a year in the form of lower electricity bills. Not only will Californians leave a smaller carbon footprint, but investing in energy saving products, features and upgrades that pay for themselves offers a more comfortable lifestyle that is simply smart living.

View the list of LaCantina Doors' compliant door & window options

Learn more about the new title 24 energy code