Rooftops can be an excellent place to install photovoltaics (PV) because the space is often unused and unobstructed. One risk of doing this is the potential to compromise the integrity of the roofing system. This program will summarize the general types of PV systems and look at the elements to consider with rooftop mounting of PV. Single-ply roof systems have been shown to be one of the most effective and reliable types of roofing to combine with PV systems. The best single-ply roofing systems are those that are ableto integrate with virtually any type of PV system and mounting method and exhibit excellent longevity.