The Appeal of Flat Roofs
Flat roofs offer many advantages. First and foremost is the cost. Flat roofs are less expensive than other types of roofing such as gable roofs, dome roofs or hip roofs. Typically they can have a pitch of up to 10°, so while not quite flat, for all intents and purposes they are. The ever so slight pitch does serve to promote drainage.
Ease of Access and Maintenance
As well as the cost, accessibility is a factor. Flat roofs are very accessible without specialized equipment or extra length ladders. If you wanted to, you could even climb out of a window onto a flat roof. It’s just like walking on the ground.
So again, another advantage, easy to clean as well. Just sweep or mop the top and you are done!