Revisions log for Answer #2636

I wouldn't do it with something like "multi-wall polycarbonate sheets," but if so, clear glass.

You might also need an alternative wood (then definitely glulam wood) or steel suggestion.

You can use a "regular" awning for shading or, in the case of wood, install something hand-held on rails from below.

Ask what makes it "so" expensive, perhaps a 90 degree angle would also be an option, i.e. not oblique, if that increases the price).

It should be cheaper than that 19k anyway.