Although flat roofs are the simplest roof-type to build, installing them can still be challenging because they need to be properly sealed. There is a significant potential for leaks because flat roofs do not have a slope for water to run off.
A flat roof can save money on roofing materials. However, the roof should be installed by a professional that has experience with flat roofs to ensure it is properly sealed. Flat roofs can be more messy to install than traditional roofs due to the variety of materials used to apply and seal them so they do not leak. There are many types of flat roofs, such as single ply, built-up, rubber membrane and modified bitumen.