There are hundreds of windows to be added. The owner is a billionaire. The contractor will do whatever he asks. Also, maybe they're testing window designs and

There are hundreds of windows to be added. The owner is a billionaire. The contractor will do whatever he asks. Also, maybe they're testing window designs and not checking out the contractors work. "Does it fit?" "Let's order 3 and try." It's not hard to imagine why someone would want to install a few windows in a big abandoned building before installing all of them.