Garden house / shed ground!?

Has no one had experience with something like this or seen it before?
The background is, besides the infiltration of moisture, also the almost barrier-free access

My buddy did that, the only disadvantage is that where there is no pad you have air, a mouse can also get through there, maybe put a grid in front...

At the entrance, there is still a batten at the bottom for the door stop. So it is not completely barrier-free.

And the threshold for the door rebate should then also preferably be placed on pads? The grille is no problem, I have already ordered it and it is here

Oh, one more thing, if it rains and the rain runs down the wall, the wind occasionally pushes some of it inside. So you can't store a sack of cement directly on the bare floor.