The sleeping loft proved to be such a nightmare to do that I had to pay my uncle to do it for me. Getting out the metal opening strip was easy. The loft appeared to have a 2 and 1/2 inch thick hardwood floor. After I nearly ruined the reciprocating saw trying to saw through it, I asked for help.
This was what actually was inside the loft floor-2 inch thick foam braced with strips of hardwood.
This is what it looked like after my uncle called it quits after fighting with it for several hours. A sheet of plywood on top, a thin masonite panel on the bottom, and an interior of foam and hardwood strips.
View of the plywood that was on top of the loft floor.
2 inch thick styrofoam on top of a masonite underpanel.
It was also bolted in via these inaccessible wood screws.