Whoa.........it's no small task to pull up the floor in the ballroom. It was interesting to watch the process. There is a black plastic moisture barrier on top of the concrete base. Then two layers of thick plywood were nailed into place............with MANY nails by the looks of it. First they saw through a chunk and then pull it up with big crow bars. All must be pulled up and removed to put in a new floor. Whew!
My knees would definitely disqualify me for this job.