Hey y'all, I need some fencing in a run that slopes up slightly at one end (perhaps 18ins max change in level) and was considering using pvc gravel boards along tthe bottom. Then they can be sunk into the slope so the timber panels above stay clear of soil level and dont rot. Was thinking of dark brown, as I stain my timber that colour anyway. Anyone any experience of these? Do you have to use pvc posts with them?