We only provide vertical roofs for a few very good reasons. Regular-style roofs have rounded corners and panels that run front to back, which can result in leaking. The same results often come from A-frame or box-style roofs on buildings over 25' feet wide. The panels often don't overlap correctly. Vertical roofs are the best solution. They include a six-inch overhang and a "hat channel" that runs through the center of the building, which prevents leakage.