Opening of the blades
Clockwise left view of pergola
The blades will rotate clockwise when standing outside the pergola and looking at the left side.
So if the facade of your building is towards the rear, your slats open from the back to the front.
With 45° slats, the sun's rays will be blocked by the slats.
This orientation is ideal for pergolas located in regions south of Lyon, where solar gain in winter is not necessarily necessary to warm your main room.