Here's an interesting deck cover that I saw on a homeowner survey inspection this past weekend.
The deck would allow for air circulation, and pressure relief during high winds. It would not offer any rain protection. The angle would be good for snow to fall off.
It is very interesting on several levels. First, it is all formed from bent sheet metal, but of a slightly thicker dimension. I found one place where the paint was peeling, and it was plain galvanized underneath. Perhaps it could be done out of PaintLock sheeting.
Nextly, if you notice on some of the pictures, it actually does not serve its purpose, and that is to provide shade during the hottest portion of the day and summer. The slats are not aligned in conjunction with the sun angles, but rather to follow the contour of the pool house building.
Nextly, it is all screwed together, an aid for those who don't weld, or have access to a welder.
Just a thought, but my wife and I are considering something like this, perhaps with the diagonal portions made to be moveable with the change of seasons, and even fold completely flat. It would not be a great thing re: blocking rain. I have seen some locally made ones from a professional company, and they do have sealing bulbs, but I don't believe they would perform 100%. Plus, the cost on them is high, although not prohibitive.
Just an idea.
Heart surgery pending?