See pic below. I want to build a fence approx 5 feet high, vertical slats with small gap between. My main issues are that the posts on other side of wall have been in for years and although feel secure the tops have rotted, they have also been put in before the shrubs so access now is not good for trying to replace them. So best bet appears to build my side of wall and as near to it as possible so less garden is taken away. On the other side of the wall there is a steep enbankment so I am not sure how much support the badly built wall has (single brick)ie if I put the posts in next to the wall would they blow over in the first gale. The strong winds generally hit the wall from my side, so would hit the fence head on. The post would be concreted in if I can get that rough concrete lifted and for the moment I am assuming just earth underneath.
Any thoughts on the best way to tackle this?