Wondering if there are any concrete experts that can chime in on what is happening with the shared retaining wall I have with my neighbor.
To me, it looks like the downspout he has running from his roof, along the fence wall, and along the top of our retaining wall is leaking and water is damaging the wall. I can pick apart the concrete by hand and there is a pile of concrete debris forming on the base of the wall. He's saying there is no leak from his side.
Am I missing something? Does concrete do this naturally? I'm trying not be an a** but this is going to cost both of us if it's not taken care of.
What do you guys think?