I'm looking into putting a "roof" over my pool. I wish to ensure that the roof does not obstruct the sun. You heard me. I wish to build the opposite of a shade roof. The roof is intended to protect my pool from detritus falling from surrounding trees (no, cutting them down is not an option) of which there is a lot. But I want to maximize the sun's exposure on the pool. It's an above ground 14' round. If my calculations are correct, here at 43°N, the height of the sun at maximum will be 70° http://www.physicalgeography.net/fundamentals/6h.html (Table 6H-1, bottom of page). Is that at true South? No way. My roof would need to be .... 42 feet above ground at its Southern edge!