I think I'm going to renovate my deck this summer. It will have to be plywood covered with something waterproof since there's a carport underneath. Should I use a sheet vinyl product, or do they have roll-on stuff that's good? People have been telling me to get a shade sail. I found a lot of reviews online but still don't know which one to go for. Does anyone have similar experiences? I've been looking at this shade sail review (shadepundit. com), which is about $50,any advice would be great.