Increased air flow
The roof can be angled to suit the aspect your patio area faces e.g angle upwards with a North/East aspect to let the winter sun in and block the summer sun out
An elevated ceiling to give a more open feel
They can enhance the look of a home.
Used as a carport they can cover higher vehicles such as Boats, Motorhomes or Caravans
They can be built using Single Skin roofing or Insulated Roofing