My stacks are in the woods. Even though the leaves aren't falling now, there are catkins falling and storms will generate debris that will fall on my stacks. I'm going to cover the tops of my new stacks soon to prevent any buildup. My year-old wood is already covered.
southern NH. I'm with BWS on this and agree non punky wood is not a sponge. I've measured wood moisture content before a rain and a week after and there's no change. I would cover anything you are going to burn in the near future (I have a small shed next to the house that holds a little over a cord for my ready to burn stuff) and I cover the tops and a foot down the sides with tarp during the time of year snow may fall figuring not much drying happens in winter anyway and that snow would also be a cover to trap and contribute moisture. Otherwise its open air for my stacks.![[Hearth.com] When to Top Cover [Hearth.com] When to Top Cover](https://www.hearth.com/talk/data/attachments/64/64784-bd06a6abe683644ee1c707382d11302e.jpg?hash=Y5tQtYap58)