Energy Star Roof

New California Title 24 Requirements: Understanding How They Affect You and Your Customers

Californias 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.

The Title 24 Roofing Code establishes new requirements to promote the installation of “Cool Roofs” in Low Rise Residential Steep Slope Construction. Cool Roofs are roofs consisting of materials with extraordinarily high reflectance of 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.

Eagle Roofing Products is committed to helping our partners adhere to the California 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 youve 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 the following Solar Reflectance (SR), Thermal Emittance (TE) and Solar Reflectance Index (SRI) requirements as outlined by the California Energy Commission (CEC).

Solar Reflectance

  • Solar Reflectance (SR): Measure of a surfaces ability to reflect solar energy.
  • Dark surfaces tend to absorb solar energy, becoming hot and passing heat into the attic below. Lighter surfaces reflect solar energy and help keep the roof and building cooler.
  • Solar Reflectance is expressed as a percentage (0-100%) as listed by the CRRC.
  • Aged Solar Reflectance tests the surface after three years and is typically lower than initial solar reflectance.
  • The new Title 24 requirement for aged SR is .20 or 20%.

Thermal Emittance

  • Thermal Emittance (TE): The ability of a roofing material to release absorbed heat energy back into the atmosphere.
  • Surfaces with low emittance transfer more heat into the roof components and attic space.
  • Thermal Emittance is expressed as a percentage (0-100%) as listed by the CRRC.
  • The new Title 24 requirement for TE is .75 or 75%.

Solar Reflectance Index

  • Solar Reflectance Index (SRI): Index that uses a calculation, incorporating both SR and TEas listed by the CRRC.
  • A color is assigned a value between 0 and 100.
  • The California Energy Commission is concerned with aged SRI.
  • The aged SRI calculation is made using a 3 year aged reflectance, as listed with the CRRC.
  • The CRRC has a calculator for new colors to determine an estimated aged SRI.
  • The new Title 24 requirement for Estimated Aged SRI is 16.

New Construction Eagle Products Available

Title 24 Products 1

 

 

 

Re-Roof and Alterations Eagle Products Available

Climate Zones 10-15

  • Any tile color that has an aged SRI of 16 or more.
  • Any color of Capistrano.
  • Any tile installed on elevated battens that provide 1” between the bottom of the tile and the roof deck.

Requirements vary by zone, depending on the building and the climate method. Any municipality, even outside of climate zones 10-15, can choose to enforce these Title 24 changes. Any municipality in all climate zones can choose more strict regulations, such as Cal Green. It is important that contractors know the requirements in the municipalities where they re-roof.

To see which climate zone your project is in and the requirements associated with your building structure, visit the CECs website: http://www.energy.ca.gov/maps/renewable/building_climate_zones.html

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Is Your Roof Cool? Here’s How it Works.

As we get into the hot, summer months, the AC gets cranked and the energy costs often rise to to keep buildings comfortable. According to the EPA, about $40 billion is spent annually in the US to air condition buildings – one-sixth of all electricity generated in a year!
ENERGY STAR qualified roof products reduce the amount of air conditioning needed in buildings and can reduce energy bills by up to 50%.”

What is Energy Star? ENERGY STAR is a U.S. Environmental Protection Agency (EPA) voluntary program that helps businesses and individuals save money and protect our climate through superior energy efficiency. (seeenergystar.gov)

Cool Roof Rated products are listed with the Cool Roof Rating Council (www.coolroofs.org) and have been tested and approved as highly reflective. Eagle Roofing offers an extensive amount of colors and profiles of Cool Roofing options, which can help reduce your energy costs by 10-30%. They also have environmental benefits as well, by reducing global warming, urban heat island effects, smog, and the production of CO2. 

Here’s How It Works:
A cool roof reflects and emits the sun’s energy as light back to the sky, rather than transferring it to the building below it as heat. Therefore, a tile’s 
“coolness” is measured by two properties–Solar Reflectance – fraction of sun energy reflected by roof (0-100%) and
Thermal Emittance – ability of roof surface to release (emit) absorbed heat (0-100%).
The recognition of the benefits are becoming more widespread and have been adopted by building codes and green building programs across the nation. 

To find out more about how an Eagle Tile Roof works, contact us today at eagleroofing.com .