Leaks on a flat roof can be particularly challenging on several fronts. Start with the initial evidence of a roof leak. This usually appears within the building’s workspace. Frequency, volume, weather conditions, and location are some of the factors to evaluate. Then the roofs surface must be examined. This includes the entirety of the envelope, membrane, flashings, petitions, gutters, adjusting walls, etc. Then the diagnosis begins, that must consider the type of roof, age, underlying decking, and previous underlays. This is properly done by a commercial roofing expert that deals with these types of problems daily. It is important that the proper materials are used to repair the issues to extend the life of the roof to its maximum use.