My floor thoughts
Trying to think this all out before I actually do it. Pull the old rubber/wood, clean and paint. Next would be red rosin paper then 1 x 2's window to window. Pink board will go between them, then a vapor barrier and then 1/2 or 3/4 plywood, attached to the 1x2's. There will be a gap along the walls and back, allowing movement, etc.
Make sense or am I off somewhere?