Wade, I suppose it depends on what you're going to use it for. In my newest barn, I had a concret floor poured, 4" thick, reinforced with both rebar and fiberglass because I figured it would make a difference and it has. Heaviest tractor ever on it about 10,000 lbs. Its good for moving and storing pallets of fertilizer and feed, but I don't have a forklift so I don't know that I need concrete. Its ok. Has cracks, no big deal. I don't remember what it cost, but if I had to do it all over again, I think I might not have poured the whole thing and stopped at a slab for an office and a working pad for the hoist, but thats me. My other barns got dirt floors and do just fine. Maybe I should be happy with the concrete and stop taking it for granted? Maybe slab with ratboard around its more valuable than I notice. I know there's stuff living under it, not sure what though. I know there's stuff living in my barns with dirt floors, nothing big though that can't be dealt with. Oh well.