The Science Behind Reflective Roofing

The Science Behind Reflective Roofing

According to the Cool Roof Rating Council (CRRC), black surfaces in the sun can become up to 90° F hotter than the most reflective white surfaces. Heat increases stress to the entire roofing system, shortening the life span of the system. Hotter roofs increase internal building temperatures, requiring cooling systems to work harder. Trapped heat also causes a heat island effect in which surrounding temperatures in developed areas rise faster, become hotter and remain hotter even after sundown. The result is increased energy demand, air pollution, greenhouse gas emissions, heat impact. In fact, a 2016 study from Concordia University shows that any improvement to a roof that limits the summertime solar heat gain actually results in energy cost savings for the building owner, as well as a reduction in the building's overall environmental related illness and more.

Beyond Energy Savings

Radiant heat and powerful UV rays cause thermal shock and rapid deterioration of all roofing materials at the molecular level. This constant exposure results in accelerated aging, lost flexibility, fatigue, splits and cracks and ultimately roof membrane failure. Heat build-up on a roof can also lead to increased building temperatures, building discomfort, and in some cases, unproductive employees.  In fact, cool roof systems can also dramatically decrease roof maintenance requirements.

Reflective roofing restoration systems deliver high solar reflectivity and thermal emittance which significantly reduces roof temperatures. Lower roof temperatures have been proven to decrease internal building temperatures resulting in recurring savings from lessened air conditioning needs. As an added benefit, air conditioning equipment is less strained which can extend the life span of that equipment too. The bottom line is that reflective roof coatings can significantly increase energy efficiency, saving money along the way by improving occupancy efficiency, extending the life of HVAC equipment, lessening the need for roof maintenance and of course, roof restoration systems can extend the life of the existing roof, typically by 5-15 years, depending on the condition of the roof.

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