The wall and the ground should be flat.
The E piece should be fixed in parallel to the ground.
In order to be sure, it is necessary to use a level.
(*it is strongly recommended to install the pergola on a concrete slab)
Make 10 holes in the wall,
thanks to a punch on the pre-
drilled areas on the E-piece.
The E piece should be fixed 2,5cm higher than the opposite
side, in order to facilitate the flow of water from the top
when it rains.
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