Roofs that are flat or have minimal slope to them are commonly seen to be problematic, poorly designed and prone to leakage. From a more informed point of view, a properly designed and built low pitch roof can be an easily constructed and cost effective option. Leakage can be problematic, but it usually is due more to the roof covering technologies most often seen used on flat roofs.
A low slope or flat roof has both advantages and disadvantages. Among the benefits, a flat roof will require less material to build, since it encompasses less surface area, also because it weighs less and does not require as much structural support.