That's what I thought, but then I started seeing diagrams like this that made me think otherwise.
I'm actually fitting it on top of a rubble wall via some chunky galvanized brackets I have. Post level is a good shout though, there should be the possibility of a bit of shimming to the bracket to get things plumb.
It's as sound as it's going to get for a 100yr old wall, I rebuilt most of it as it was a crumbling mess.
Fence will be slated, 900mm high and tied in to these two adjacent runs, so I think it'll be fine in regards to wind. It's a fairly sheltered spot anyway do to the adjacent terrace.
That's what I thought, but then I started seeing diagrams like this that made me think otherwise.
I'm actually fitting it on top of a rubble wall via some chunky galvanized brackets I have. Post level is a good shout though, there should be the possibility of a bit of shimming to the bracket to get things plumb.