Metal building condensation

Keep it closed up, I have noticed it more at my place this year with the screwey weather if I am out working with the door open. I had to run my big barrel fan to dry the floor after I closed it all back up after a few hours. 30's to 70's and everything in between... All depends on what the humidity is. Only low cost things I have seen help are crib things up off the concrete and put down a good vapor barrier, can get it at any home improvement store in a big roll. I have done it before when storing dirtbikes for winter, would prevent condensation from building up in the crankcase and "milking" the oil up over the winter. I just cut out a section big enough to cover where I was parking the bikes and duct taped it down.