Oh yea the floor is definitly covered...I have 2x6 floor joices going north and south and then I used 2 2x8 and I sandwiched a piece of 3/4 plywood inbetween it...made a laminent beam....Made two of them 8 ft long and i put them east to west 6 ft a part......I used 4 house floor jacks that hold 38,000lbs a piece at each end.....the floor is good.......I have pics I just can't seem to upload......I am interested in the ventalation system I assumm a high powered bath vent with a humidity switch/sensor that turns on when it needs it.......Unless thats is a allot of money than i will just out the darn thing out side....