Ratings, Codes and Programs
Membership and Outreach
For those of you who are unaware, John Wonders is no longer the contact at the Atlas Test Farm. His contributions and support will be missed.
Jaynae Brust will be the new contact at Atlas for placing your product samples on weather exposure. Please see the following link for her contact information: http://www.coolroofs.org/productratingprogram_test_farm.html
On September 6th, a CRRC lab training workshop was held at Lawrence Berkeley National Laboratory. All attendees indicated that they found the workshop interesting and informative. Special thanks to Hashem Akbari, Ronnen Levinson and Paul Berdahl for their help in facilitating this event.
The CRRC is considering holding the next lab training in the spring of 2008, dependent on interest. If you would like to attend a springtime lab training workshop, please contact Rebecca at your earliest convenience: Rebecca@coolroofs.org. Once we gauge the level of interest, we can determine a date to hold the event.
The CRRC Technical Committee met at the Pacific Energy Center in San Francisco on Tuesday, October 16th. Key issues discussed include:
High Profile Products and E1918A
Mr. Akbari and Mr. Desjarlais presented recent studies relating to the solar reflectance of high profile products (tile and metal, respectively). Mr. Akbari also presented data on a modification of ASTME1918, called E1918A (alternate), which allows testing a small product sample (approximately 1m2) by comparing it to a reference black and a reference white. The Committee voted to allow E1918A as an acceptable test method for CRRC. The CRRC and the tile and metal industries will continue to contemplate how to best rate high profile products.
Color Family Program Revisions
The CRRC’s Color Family Program was designed for the metal industry, and allows manufacturers to group products of the same binder/resin technology by color, bestowing each Color Family Group with a minimum default value for both solar reflectance and thermal emittance. Color families require aged testing on only one product for each family. The Cool Metal Roofing Coalition requested that a few modifications be made to the Color Family Program to expand seven of the Color Family Groups. The Committee voted to accept the proposed revisions to the Color Family program.
The Committee discussed how to best collaborate with the American Society for Testing and Materials (ASTM) in order to develop and maintain the test methods referenced by the CRRC Product Rating Program.
Correction to the Reflectometer (C1549) Measurements
LBNL is working with Devices and Services to correct their reflectometer’s red sensor. The sensor is overly responsive to near-infrared wavelengths, so this correction will lower the reflectance of materials that are highly reflective in the infrared. The Committee discussed the issue, and will work with LBNL, Devices and Services and the Accredited Testing Labs to resolve this issue. The Committee decided to look into a re-rating requirement and set up a sub-committee to discuss this.
The CRRC Board of Directors recently clarified that aged radiative property data is a mandatory requirement for all CRRC product ratings, including inactive products. For inactive products, the aged ratings will not be added to the online Rated Products Directory, but will appear on the Inactive Product Rating list, which is not published online, but is available from staff upon request. The Aged Product Rating Application and Aged Test Results Report must be received by CRRC staff within 90 days of a product’s removal from the test farm; no fee is required.
Ratings, Codes and Programs
In preparation for the 2008 update to Title 24, California’s Building Energy Efficiency Code, the California Energy Commission (CEC) has released pre-45 day language. This draft language proposes adding cool roof prescriptive requirements to steep slope and residential applications in certain climate zones. The CEC plans to start their formal rulemaking process this fall.
The pre-45 day language is posted at: http://www.energy.ca.gov/title24/2008standards/documents/pre-45-day_language/index.html
The CEC is giving away free copies of their new HVAC Changeout and Cool Roofs DVD. The videos contain interviews and presentations on several aspects of complying with the Title 24 requirements. Please contact the CEC directly for your free copy: (916) 654-5106.
Green Seal is a non-profit organization that promotes the manufacturing, purchasing, and use of environmentally responsible products and services through the development of environmental standards for specific product types, and through certification of products that meet those standards. Green Seal is currently revising their Environmental Paint Standard (GS-11), which sets requirements that paint products must comply with in order to be Green Seal certified.
The current standard for exterior topcoats limits the concentration of Volatile Organic Compounds (VOCs) by weight, and forbids certain types substances, such as lead, within the paint and packaging. The revised version adds a provision specific to reflective coatings, which sets minimum solar reflectance and thermal emittance requirements.
The proposed requirement states that reflective coatings must meet the following minimum solar reflectance requirements when tested with ASTM E1918-06 Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field:
Reflective coatings must also have a thermal emittance of 80% or more, tested in accordance with ASTM C1371-04a Standard Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable Emissometers.
The CRRC submitted comments urging Green Seal to expand the approved solar reflectance test methods to include ASTM C1549 and ASTM E903 and to reference the CRRC’s Rated Products Directory.
Green Seal plans to release the final revised standard by the end of 2007. To view the proposed revision to the standard, please visit: http://www.greenseal.org/certification/g11_paintstandard_dev.cfm.
ASHRAE Standard 90.1-2007, Energy Standard for Buildings Except Low-Rise Residential Buildings is currently under revision. ASHRAE has released the 45-day language, which is open for public comment until October 29, 2007. ASHRAE committee members will receive comments in November and December 2007, and will respond to all comments in January 2008.
The proposed revisions would require most roofs in climate zones 1, 2, and 3 (the southerly states in US) to comply with one of four options:
• Minimum Solar Reflectance of 0.70 and a minimum Thermal Emittance of 0.75; or
• Minimum Solar Reflectance Index of 82; or
• A ballasted roofing system, including vegetative roofs (New to this version); or
• A roof, with a slope greater than 2:12, offset-mounted from the roof deck and a minimum Solar Reflectance of 0.40 (New to this version).
The CRRC Product Rating Program is still referenced in the proposal as a nationally recognized organization that can accredit laboratories to determine the values for solar reflectance and thermal emittance.
For more information or to read the public review draft, please visit: http://www.ashrae.org/technology/page/331.
Membership and Outreach
On September 20th-22nd, CRRC staff attended the West Coast Green Expo in San Francisco. The tradeshow focused on residential green building. Attendees were largely architects, consultants and homeowners. The CRRC booth enjoyed a steady stream of visitors. We hope to see some of you at West Coast Green next year!
CRRC staff also attended the MetalCon tradeshow at the Las Vegas Convention Center from October 3-5th. Staff enjoyed the opportunity to walk the floor and learn more about metal products. We saw many of our participants there, and quite a few friendly faces. Staff also spoke with new manufacturers and contractors about the benefits of a CRRC product rating.