jmf -
Quote:
Originally Posted by jmf
"Englert’s Ultra-Cool metal roof coatings dramatically increase the reflectivity of medium to darker color roofs, meeting Energy Star specifications for cool roofs. Consequently, architects and builders can enhance the appearance of their projects with the use of medium and darker colors and save warm weather energy costs because reflectivity keeps the roof and interior spaces cooler. In addition, the use of Englert’s Ultra-Cool metal roof coatings has several positive impacts on the roof, its structure and the environment. Heat is reflected away from the building, urban smog is reduced when environmental temperatures are reduced, the life expectancy of the roof increases due to less expansion and contraction and public monetary incentives are available for using reflective roofing products. Englert standing seam metal roofs are available in a wide variety of Ultra-Cool colors including dark bronze, charcoal gray and matte black."
My neighbor is a dealer for Englert. This is from thier site.
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Yes, but those are also the "normal" colors that meet aesthetic expectations of what people want to buy. I went here :
Englert: Ultra-Cool Coatings are available in the following popular colors
In the above you can see that the white has a better Solar Reflectivity Index ...
Atlanta Roofing | Cool Roofs | Green Roofs | LEED Certified Roofs | Solar Roofing in Atlanta | Green Wave Forever
Quote:
Cool Roofs - Cool roofs are a very inexpensive way to significantly lower your energy bills. A “Cool” roof is cool because it has a high Solar Reflectivity Index(SRI) and High Thermal Emissivity. These are two terms that you will hear when learning about sustainability and energy efficiency. Solar Reflectivity Index refers to how much sunlight is reflected off the surface. To qualify for a roof to be “cool” and earn the appropriate LEED Credits, a roof must have an SRI of 78 or higher. Thermal Emissivity refers to a materials ability to release stored heat. This factor is a number between 0 and 1. The higher the number, the less heat that a surface holds.
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CarloSW2