and aged solar reflectance and thermal emittance properties are tested and
recorded on the CRRC directory of roofing products. A CRRC label displaying
initial and aged solar reflectance and thermal emittance can be displayed on
packaging materials. The CRRC logos can also be used for marketing
aging protocol for solar reflectance and thermal emittance
involves exposing test panels at commercial weathering farms in
three specific locations in the country. After three years of weathering the
panels are tested in the unwashed condition..
importance of having a product listed by the CRRC is that California’s Building
Energy Efficiency Standard, Part 6, Title 24, refers to the CRRC as the sole
authoritative entity at this time for rated roofing product information. In
Title 24, products used in California must be chosen from the CRRC directory, or
suffer significantly low default solar reflectance and thermal emittance values
in the Title 24 energy calculations.
CRRC adopted a Color Family Concept proposed to them by the Cool Metal Roofing
Coalition. In the Cool Family program, representative products from 17 distinct
color families are tested for solar reflectance and thermal emittance using the
normal CRRC standard. Other products from within each of the color
families, based on their L,a,b values, can then be listed in the CRRC directory
using a default value for the initial solar reflectance or the actual measured
value, whichever is lower, for that color. The color products also
use the aged solar reflectance and thermal emittance values of the
representative product for that color family. This procedure foregoes the cost
and time of weathering the products within a color family for aged values.
CRRC is referred to in the LEED program, and the data from the CRRC directory
can be used for registering ENERGY STAR roofing products as well. CRRC is
pursuing becoming a Certification Body in the revised ENERGY STAR
program. They are also working to become a referenced resource in
other energy codes and standards.