Low-income favelas would benefit from green roofs ... da Silva's roof. Students from both the neighborhood elementary school and nearby federal university helped roll up Spanish moss, kalanchoe ...

Spencer Claeys: My name is Spencer Claeys, and I specialize in deep cleaning and removing layers of moss off of roofs. The area that ... But generally, if it's green or black or something living ...

Then, a customized treatment plan is created based on the roof's material and condition. "The best way to prevent moss is with regular maintenance, keeping roofs free of dirt and debris.