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Cool Roof Rating Program

Cool Roof Rating Program. Brazil, November 2011. 3rd Party Rating System for Roofing Products. Educational Resource on Cool Roofing. What is the CRRC?. CRRC Mission: To implement and communicate fair, accurate, and credible radiative energy performance rating systems for roof surfaces.

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Cool Roof Rating Program

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  1. Cool Roof Rating Program Brazil, November 2011

  2. 3rd Party Rating System for Roofing Products Educational Resource on Cool Roofing What is the CRRC? CRRC Mission: To implement and communicate fair, accurate, and credible radiative energy performance rating systems for roof surfaces.

  3. How Does the CRRC Rate a Cool Roof? CRRC only measures surfaceproperties: • Solar Reflectance • Thermal Emittance Rated on a scale from 0 to 1, where the higher the value, the more reflective or emissive.

  4. Solar Reflectance Index • Calculation used to combine solar reflectance & thermal emittance into one simple value. • Scale of 0 to 100, higher the better LBNL SRI Calculator: http://coolcolors.lbl.gov/assets/docs/SRI%20Calculator/SRI-calc10.xls

  5. Aging = Soiling & Weathering • Soiling • Dry and wet deposition of atmospheric aerosols and suspended dust • Microbiological growth • Weathering • UV (mostly) and visible radiation • Thermal cycling • Moisture • Degradation

  6. Initial vs Aged Ratings

  7. Testing Laboratories • CRRC product ratings are conducted by • Accredited Independent Testing Laboratories • ISO Certified • Lab Training Required • Independent from a supplier or roofing product company • Annual Round Robin Quality Assurance Testing

  8. CRRC Test Methods Solar Reflectance • Reflectometer (ASTM C1549) • CRRC-1 Test Method 1 • Spectrometer (ASTM E903) • Pyranometer (ASTM E1918)

  9. CRRC Test Methods Thermal Emittance • Emissometer (ASTM C1371) • Considering AZ Technology Temp/Tesa 2000 (ASTM E408)

  10. Weathering Farms • Product aging conducted at Accredited Test Farms • ISO Certified • Independent from a supplier or roofing product company • Products aged for 3 years • 3 climate zones across the US • Exposed at steep or low slope angles

  11. US Climate Zones Cold/Temperate Hot/Dry Hot/Humid

  12. Considering Climate

  13. Low vs Steep Slope VS

  14. Accelerated Aging • Laboratory simulated soiling, to shorten aging period • DOE & Lawrence Berkeley National Laboratory Ongoing Study spray nozzle spraying vessel samples

  15. Manufacturers send samples to a test lab for Initial Testing 3 Year Aging at the 3 Test Farm Locations Aged Testing at a Test Lab Product Rating Process

  16. The CRRC Label

  17. Rated Products Directory http://www.coolroofs.org/products/search.php

  18. Rated Products Directory

  19. Supporting Code Compliance

  20. Defining a Cool Roof Steep Low Reflectance Emittance Slope SRI Insulation Climate Zones Initial Thermal Mass PV Allowances Aged Calculated Aged

  21. California Energy Code If CRRC 3-year aged Reflectance values are not yet available, the CEC derives the aged value using Raged = 0.2 + 0.7[Rinitial - 0.2]

  22. Resources CRRC-1 Standard • Dictates how to prepare and test roofing products http://coolroofs.org/documents/CRRC-1Standard-finalANSI.pdf CRRC Program Manual • Dictates protocol for operating the CRRC Rating Program http://coolroofs.org/documents/CRRC-1_Program_Manual_04142011.pdf CRRC Website • Educational resource on cool roofing information http://coolroofs.org/links.html

  23. Contact Us www.coolroofs.org The “Cool Line” Tel: (866) 465-2523 Email: info@coolroofs.org Sherry Hao (510) 482-4420 x256 sherry@coolroofs.org

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