The tents have no flysheets because we hung them under a grass thatched roof. As you will know, of course you can hang them under any stable steel-construction with a fly sheet or whatever kind of roof you prefer.
As you can see in the photos, we had our tents set up on a 10 x 11m (33 x 39 feet) concrete platform, with nice furniture and cozy carpets inside. Meaning: our tents don’t have any floor. So, you are perfectly free for your likes and needs concerning the floor.