Hi I have one of those pergolas with no roofing and the beams are level. I want to put polycarbonate on it and I had the idea of screwing uprights to the beams to support the battens so that I can get the 5 degree slope. I am wondering if anybody knows if this would meet building codes or if not what is another solution (other than dropping the ends of the beams down to get the slope) I am in a N3 area.
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