I have a small patio that was covered with transparent PVC sheets. I liked all the light they let in, but they are all broken and full of holes, so it's time to think about replacing them. However, since I live in Texas, the sunlight that they let through heats up the room that is adjacent to them. I've been thinking about replacing them with either "tinted" polycarbonate sheets or galvanized panels. What do you guys think? Is there something out there that I could do that would be a better option?