JoeyD said:
How much moisture really gets trapped by covering the just the tops? I stack my wood on pallets so when it rains water gets down inside the stacks. The outside of the stacks dry fast and don't need to be covered for most of the year. Surface water dries in a couple of hours. But the middle doesn't get the sun that the rest of the wood gets. Water can stay there for days if there isn't a breeze. Air doesn't travel from the top down to dry your wood but it will go vertical even if the tops are covered. I figure less moisture can only be a plus.
Joey, you asked, "How much moisture really gets trapped by covering the just the tops?" Not a lot. But by leaving it uncovered the first summer, you get that little extra drying because the moisture can evaporate easier. No doubt there are doubters and will come back at me for these posts, but we've tried many ways over the years and this is simply the best way we've found.
You also stated, "The outside of the stacks dry fast and don't need to be covered for most of the year. Surface water dries in a couple of hours. But the middle doesn't get the sun that the rest of the wood gets. Water can stay there for days if there isn't a breeze."
It would take one God-awful rain for water to get to the middle of our stacks. Last month we got 5" of rain one day and 2 more in the next 2 days. I looked at our stacks of wood and the water didn't get anywhere near the center of the stacks. Only the very tops and the sides. That moisture left faster than it came.
I agree with your last statement, "I figure less moisture can only be a plus." That is exactly right and that is why we try to get as much moisture from our wood as we can. I'll be covering that 9 cord of wood in November or December. We'll burn it in 6-8 years. We will be happy campers!