Published standard for testing the initial and aged surface radiative properties of roofing and exterior wall materials from the Cool Roof Rating Council.

The current edition of ANSI/CRRC S100 – “Standard Test Methods for Determining Radiative Properties of Materials” was approved by the American National Standards Institute (ANSI) on December 5, 2024. The standard covers test specimen preparation and test methods for measuring the initial and aged radiative properties of roofing and exterior wall products. The standard is referenced by building codes and rating programs worldwide in order to measure the initial and aged solar reflectance and thermal emittance of roofing and exterior wall materials.

The first version of this standard was published in 2010 and was formerly titled the “CRRC-1 Standard.” The standard is updated periodically following a consensus process in accordance with ANSI and CRRC requirements.