This was a first for me. A hole is punched in a window for extension cords. Putting duct tape over that rotting concrete would complete the design. (That's a joke.) ;-b There might have been something wrong with the concrete in the first place. This is an auto repair shop and it's a big building. It's so strange to me that they've let water drain down in that spot, maybe from the rain downspout, so that it's destroying their building. That didn't just start last year. They must be really stupid guys.