I've been fighting for years to keep my splits dry. I stacked them on pressure treated wood rails and used 2-3 tarps over the many rows - but the driving rains and chewing mice (lots of holes) make the tarps almost useless - and a woodshed is not in the cards. My wood has to be really dry for the Woodstock Fireview stove to be happy. I envy my Western-state friends who can leave their stacks uncovered and still have dry wood. Here in the NorthEast corner of Massachusetts, an uncovered pile will be liquid sawdust in a few years. My solution was to buy three sheets of pressure treated 1/2 inch plywood, enough to cover almost 2 chords worth at once. As I use up the covered stacks I will keep covering the uncovered stacks so I should have at least 6 weeks worth covered and drying at one time. It cost $63 for the 3 sheets at HD. I overhung the edges about 10 inches on all sides and tarped the sheets - so far torrential rain has not gotten the sides of the stacks wet. Hopefully the rodents wont like the chemical laced wood. We'll see, this is the first year.