The sr value is a number from 0 to 1 0.
Sri roof rating.
Different roofing technologies have different sri values.
Most manufacturers still report separate emissivity and reflectivity data in their literature but the cool roof rating council an organization that verifies and labels cool roofing products has begun using the measure while retaining reflectivity and emissivity measurements.
The higher the sri the cooler the roof will be.
Check our latest roofing ratings for detailed results for 16 different lines of asphalt roofing shingles.
Berridge metal roofing is cool and sustainable the high reflectivity emissivity and solar reflectance index sri of berridge metal roofing helps mitigate the heat island effect.
A value of 0 indicates that the material absorbs all solar energy and a value of 1 0 indicates total reflectance.
Berridge s kynar 500 hylar 5000.
Solar reflectivity r solar reflectance index sri by color.
The cool roof rating council is an excellent resource to finding out sri solar reflectance and thermal emittance values.
Cool metal roof colors are optimal for reducing energy consumption particularly where cooling loads dominate.
Cool roof rating council crrc has created a rating system for measuring and reporting the solar reflectance and thermal emittance of roofing products.
Asphalt shingle products with an energy star rating do not utilize the sri compliance path.
The cool roof rating council is a not for profit organization that validates the reflective and emissive properties of cool roof products.
The cool roof rating council accepts test reports from approved testing laboratories and then compiles the information in an easily accessed database.
These shingles must have an initial solar reflectance of at least 0 25 and a three.
This system has been put into an online directory of more than 850 roofing products and is available for energy service providers building code bodies architects and specifiers property owners and community planners.
Higher sri ratings for shingles mean greater reduction in cooling load on a home.
Cool roofing products are classified in many cases by their solar reflectance index sri.
Cool roof rating council.
Solar reflectivity or reflectance is the ability of a material to reflect solar energy from its surface back into the atmosphere.
The cool roof rating council was created in 1998 to develop accurate and credible methods for evaluating and labeling the solar reflectance and thermal emittance radiative properties of roofing products and to disseminate the information to all interested parties.
Asphalt roofing shingles with higher sri ratings are cooler in the sunshine.
