What do I do with the fence board?


I bought some corrugated iron for the fence, but I decided to make the fence from something else.

What can I do with that board? It will have the color of the metal tile on the house. I will have a terrace and a gazebo in the yard. Is it ok to use flat sheet, with folds, to cover terraces, carports, gazebos, etc.? I know that on the roof of closed things there is a need for ventilation between the sheet and the board, to avoid condensation. Here, when the interior is in the open air, is it possible to use flat sheet metal for covering?