The sun reducing screens are available in 25%, 50%, 75%, or so I was told when we did out birdcage, we opted for 50% in the roof area only. While we have not noticed any reduction in wind, these do hold the water a little longer. Try Whites Aluminum (rt 441, where route 44 crosses a mile or 2 before the Leesburg airport). Also note you need a special size FLAT spline for this screen as it is much heavier (thicker) than normal screen. I had a very hard time finding the correct spline when I enclosed our front porch.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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