We used the SunTuf panels from Home Depot in both the grey and the clear to give it that "skylight" effect. Looking back, if we could have afforded it I would have loved to go with all clear in our run but hindsight is 20/20 right? Anyhow, we used the screws with the washers AND silicone caulking. Can't be too careful here in the PNW. We didn't use the wavy boards, hubby said we didn't need them because they lie flat on our 2X4 framing. I guess we will just have to see how they will hold up in our winter storms