I am about to make a 2400mm x 700mm x 1800mm firewood shed for storing dry wood and keeping it that way. The location is the least affected by elements on our property, it's very protected from wind, and the best site for minimising rain. However, the downside is that is gets precisely no sun. Unfortunately there really isn't anywhere else to put it.
I am more concerned about encroaching dampness and rats living in the free nest than anything.
My instinct says to make this shed water-tight so rain can't get in, put a door on it and seal it up, rather than the traditional style of wood shed which is more open to the elements for airflow/drying. I want to be able to go into my shed, grab a dry log, put it on the fire. When I put a tarp over the wood on a raised wooden platform it keeps it dry through storms and no condensation/mould forms and there is zero proper airflow there, but like I said, the wood is dry.
I am going to build the floor today, and if someone hadn't said to me "wood sheds need to have airflow, because all the ones I see do and because condensation mumble mumble" I wouldn't even have asked.
However, because this shed is not going to be airtight, there will be some degree of dampness that gets in. The floor will be raised off the ground by cinder blocks and I could space out the floor boards for ventilation but I was just going to try to keep it dry and rat free by sticking plywood on top of the boards to be honest. I am using clear corrugated PVC for the roof and sides of the shed.
EDIT: I realise now that it would be more descriptive to describe it as a glorified dry wood storage box, than a wood shed per se