General flat roof maintenance should include removing all stagnant water and puddles. This can be done by installing a roof drain or siphon system. The quicker you get rid of standing water, the less chance there is for a leak to occur. All flat roofs should be inspected semi-annually and after severe weather. Inspections should pay particular attention to flashings, as any sharp bends or joints can open up and may require resealing. Additionally, keeping your flat roof and gutters free of debris will prevent water build up and leaks.