Empty rooftop space is a great location to place solar panels and is often abundant in large commercial buildings and distribution centers. When evaluating for rooftop solar, it’s important to consider the age of the existing roof, geographical latitude, weather conditions, roof slope, and shading from adjacent buildings or vegetation. Melink uses a ballasted roof mount racking system, meaning that we typically do not make roof penetrations. http://www.sun-novasolar.com/ground-mounting-system/pile-ground-mounting-system/