Corrugated sheet metal. 5x pieces. Purchased one year ago and they are in great condition with very little to no degradation as can be seen in the photos. This setup lowers the porch temp enough to make it enjoyable in the summer. My design kept out most of the lighter rains but I have ideas to make it better if you're interested. The wood, bolts, and ratchet straps are included. I'll throw in a couple tubes of silicone to create a seal where the roof meets the wall. I also have a sheet metal top piece that I was going to use to make a gutter that is included in the price as well. Solid deal, don't miss out! Text, Whatsapp, or call +19102297280 if you're interested.