We size the system to the building. A shallow-bay shell with a young roof and heavy ponding gets a different recommendation than a twenty-year-old park with brittle laps and failed pitch pans. We are not interested in selling the same roof to every building.
Flat flex roofs and standing water are a constant fight in this region. We get sustained heavy rainfall, and when a tropical system parks over the area the way Harvey did in 2017, a roof's drainage gets tested at the absolute limit. Flex roofs are especially prone to ponding because rooftop unit curbs, walkway pads, and added penetrations interrupt the natural slope and create dams. Long-standing water accelerates membrane breakdown, overloads the deck, and turns small seam defects into active leaks.