Currently they couldn’t, so I built some extra ladders so they could finish. It isn’t game breaking, just something I noticed that could be better. Building the ladders from the bottom, in this case, just takes longer and then I have to destroy the ladders to make sure monsters can’t get in. In the real build I was trying to create some long buildings as defense and noticed that it wouldn’t finish. This was just a simplified example for the screenshot and recreate.