2 Answers

I have built two sheds, one with a concrete slab poured, having bolts in wet cement to hold the sills.  Another, has some timbers which I leveled and set the floor joists upon.  The cement one will surely hold up better, but the slab is not off the ground by much, and if there may be a water problem, things will get swamped in it.  The other is higher, with floor actually 7-8 in. above the level of yard.  hope this helps you...

I have a brick floor in my potting shed. The structure was just an open sided shed and as a junk collector, I had enough materials to add a wall, walls and a door, lighting, then a few bricks. a table and a chair, then a better roof in some areas, found more garden tools and hung them on a wall, then added an old window  and two more and a few more bricks in the floor. It will never be finished because it is just a collection of discarded things that looks like a little house for a hermit and I was thinking of putting a little stove in there that I found at a garage sale for ten bucks. I know its whimsey, so what , it's part of my entertainment.