How was the ground underneath the shed and the shed foundation prepared?
Untreated wood must not be in contact with the ground or in contact with concrete on or buried in the ground.
Bare ground under the shed must look dry most of the time and air must be able to circulate freely under there.
(One morning on WRKO Radio) The tub's not clean! Let's remodel the bathroom.
(One afternoon on WRKO Radio) It's time for an oil change. I'm going to trade in the car for next year's model.