Since there aren’t one but many types of flat roofing options, you need to see which option suits you and your home the best before deciding.
Built-Up Roofing (BUR): These are made up of hot tar and gravel, with three or more layers of waterproof ply sheets. With offering protection against the rain and UV rays, it is cheap, low maintenance, and the oldest form of flat roofing.
Modified Bitumen Roofing: This type of flat roofing is much easier to be installed in a number of ways. It uses only a single layer of roofing material (asphalt) as its base and it is a pocket-friendly option that offers more flexibility in terms of temperature changes.