Flat roofs are constructed of an under layer and a top coat. There are always two parts and the proper sealing of them is critical to the integrity of the roof. The coating can be a PVC-like synthetic rubber coating, asphalt or a modified bitumen. All of these coverings need to be checked regularly to ensure that the roof stays leak free. Flat roof styles are typically seen in warmer weather climates, as most could not stand the weight of winter snow build-up. They are architecturally appealing and can be economical if used in the right setting while being properly maintained.
Flat roofs have some distinct advantages over their sloped counterparts. One of the most obvious advantages is that flat roofs are easier to climb up on and inspect. Although any excursion to the roof should be dealt with using care and caution, flat roofs offer significantly more stability and horizontal surface than sloped roofs do. Another benefit of flat roofs is that they are cheaper to re-coat and install than sloped roofs. However, this is a tricky point, because flat roofs need to be re-coated and sealed every few years to help them maintain their integrity and prevent leaks. If the roof is not properly cared for, there can be a need for replacement much sooner which would make a sloped roof actually more cost effective.