There was definately no solid sheathing as you could peak between the foil board and see the underside of the tiles. That is why I was concerned about the cracked corners. There were also a few that were cracked in the center as well.

That is a dryer vent. Someone cut the top of the tubs lid and installed a filter in the top to keep the lint out of the attic. I just put it on there for laughs.

__________________
If it weren't for lawyers, we would never need them.