CRRC Standards Development

Last page update: July 5, 2018

The 2016 edition of ANSI/CRRC S100 - Standard Test Methods for Determining Radiative Properties of Materials was approved by the American National Standards Institute on April 26, 2016.

Click here to download ANSI/CRRC S100 (2016).


The CRRC became an accredited standards developer for the American National Standards Institute (ANSI) in 2007. After a three-year process, the first edition of ANSI/CRRC S100 - Standard Test Methods for Determining Radiative Properties of Materials (formerly CRRC-1 Standard) was approved on November 16, 2010.

ANSI's Essential Requirements and CRRC's procedures specify that the process for standards development must be a collaborative, balanced, and consensus-based approval process. As such, every few years the standard must go through a public review process. As part of this process, consensus must be reached by representatives from materially-affected and interested parties. ANSI/CRRC S100 (2016) was developed with input from the public and the CRRC Consensus Body, a balanced group representing diverse interests, ensuring that all aspects of the standard are considered.

ANSI/CRRC S100 covers test specimen preparation and test methods for measuring the initial and aged radiative properties of roofing products. ANSI/CRRC S100 is referenced by building codes and rating programs worldwide in order to measure the initial and aged solar reflectance and thermal emittance of roofing products.


Next Update of ANSI/CRRC S100:  2018-2020 Public Review Process

Consensus Body Formation

The CRRC is seeking members for its Consensus Body for the 2018-2020 public review of ANSI/CRRC S100. Per the CRRC’s policy on committee balance, we are seeking applicants who represent the following Interest Categories:

  • Users:  Individuals who represent entities that use the CRRC Product Rating Program or ANSI/CRRC S100 to specify products either for installation, for regulatory purposes or for a voluntary program. This category includes building owners, facilities personnel, government agencies that use the CRRC Product Rating Program as the basis for regulation, organizations that have green building certification programs or roof rebate programs, specifiers, consultants, contractors, and building inspectors. This category also includes organizations that provide testing and weathering services for CRRC Licensees (e.g., Accredited Independent Testing Laboratories and Approved Test Farms).
  • General Interest:  Individuals that represent entities that do not use the rating system directly and do not produce or sell roofing materials. This category includes independent research organizations, government agencies with an interest in energy or environmental issues (but do not establish or adopt regulations pertaining to cool roofs), non-profit organizations, and other organizations that do not directly profit from roofing product sales but have a general interest in cool roofing, energy-efficiency, and other related issues.
  • Producers:  Individuals that represent entities that produce or sell products that may be rated by the CRRC. This category includes companies that produce or sell roofing materials and organizations that represent companies producing and selling roofing materials (e.g., industry or trade associations).

Candidates should have a knowledge or familiarity with the CRRC Product Rating Program and/or ANSI/CRRC S100 standard, and should have a technical understanding of the concepts covered in the standard. Candidates do not need to be CRRC Members to serve on the Consensus Body nor is there a participation fee.

The Consensus Body is responsible for evaluating public comments from stakeholders and to ensure compliance with due process requirements. The Consensus Body approves proposed revisions to ANSI/CRRC S100 before approval and adoption by the CRRC Board of Directors at the end of the multi-year process.

Consensus Body members must be able to make the following time commitments during the review period (September 2018 through late 2019):

  • Review of the proposed changes to the draft ANSI/CRRC S100 document and proposals submitted by the public (could be 5 - 10 documents)
  • Participation in at least three (3) two-hour conference calls
  • Submission of ballots after each public comment period and for the final draft standard

If you are interested in becoming a member of the Consensus Body, please email the completed and signed Potential Sources of Bias and Conflict of Interest form (click here) to no later than July 31, 2018.


Schedule of Key Milestones (Coming Soon)


Frequently Asked Questions

What is ANSI/CRRC S100?

ANSI/CRRC S100 (formerly CRRC-1 Standard) was developed as a consensus-based standard to provide a consistent reference in energy and building codes regarding measuring the radiative performance of roofing performance. ANSI/CRRC S100 covers specimen preparation and test methods for measuring the initial and aged solar reflectance and thermal emittance of roofing products.

What is ANSI?

The American National Standards Institute (ANSI) is a distinguished non-profit organization that coordinates the development of voluntary consensus standards through its Essential Requirements, which require the process for standards development to be fair, open, and balanced.

How often is ANSI/CRRC S100 updated?

The CRRC updates ANSI/CRRC S100 approximately every three years. The primary reason for updating the standard is to incorporate changes made to the CRRC's Product Rating Program that are related to radiative properties measurement, including new test methods and practices adopted by the CRRC since the last update of ANSI/CRRC S100.

Contact Us

For questions about ANSI/CRRC S100, ANSI, or the public review process to update ANSI/CRRC S100, please contact Sarah Schneider, (503) 606-8448 ext. 502.