Here is a sketch of the privacy fence I would like to build above our brick wall. The wall is about 5 feet high. To add 2 feet above that, I would cut conduit to about 7 feet long. The conduit would be anchored into the ground by rebar (the way people normally do with garden trellises.) I've only seen these fences with shade or privacy fabric. Would it be possible to attach light wooden fence boards? It's what I have laying around. But how would I securely attach them in this position? The hole straps seem like they would be too weak for this purpose. And how can I make the design stronger? I live in a mild climate with occasional strong winds (maybe a few weeks in a year we'd get 20 mph winds?) Thank you for any input!