Every shingle in the cool roof collection features a precise mix of solar reflecting granules to help comply with the solar reflectance index sri requirements of title 24 part 6 even with deeper vibrant colors.
Cool roof highest reflectance.
The solar reflectance measurement ranges between 0 0 and 1 0 with 1 0 representing 100 reflectance with no absorption.
According to the lawrence berkeley national laboratory.
This is due to the nature of the roof itself.
For every 10 increase in roof reflectance heating cooling costs drop 2 cents per square foot per year.
Cool roof rating council 2435 n.
Thermal emittance is measured in accordance with astm c1371 or the slide method determined by roofing product type.
The higher the solar reflective value the more efficient the product is in reflecting sunlight and heat away from the building and reducing roof temperature.
What qualifies as a cool roof typical minimum cool roof requirements are shown in table 1 and this is what we mean by cool roof throughout this document.
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.
White or light colored single ply vinyl membranes achieve some of the highest reflectance and emittance measures of which roofing materials are capable.
Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.
Solar reflectance can be measured in accordance with astm test methods c1549 e1918 e903 and crrc 1 method 1.
Standard or dark roofs can reach temperatures of 150 f or more in the summer sun.
The more waves that are bounced back into the atmosphere the higher the solar reflectance of the asphalt roofing shingle.
A roof can qualify as cool in one of two ways.
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Solar reflectance is the most important characteristic of a roof product in terms of yielding the highest energy savings during warmer months.
As one of the most trusted local roofing companies in your area jeff woods construction will help you secure the most energy efficient roof for your home.
A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning.
For every 1 increment in roof reflectance the surface temperature of the metal roof decreases 1 degree fahrenheit.
Asphalt shingles with higher solar reflectance values can achieve energy star certification.
Explore our expanded cool roof collection and reflect your unique style.