It is a roof that is totally or almost level. The advantage Of Flat roofs is High Efficiency, Better Accessibility, and Durability. Disadvantage Of Flat Roofs is Lack of Drainage, Temperature Changes, and Higher Repair Costs. Types Of Flat Roofs are PVC Roofing, TPO Roof, Modified, Bitumen Roofing, and Metal Roofing. Visit our blog to know more about What Is the Best Flat Roof Material.