Everybody has their own method, that's why we are americans. What I have done, which my grandfather always did was stack single rows with at least a foot in between for air flow and put tin on top with rocks to hold it on. Scrap pieces, used tin from old buildings and what not. This was his theory, summer sun on the tin heats it up and in turn creates a "turmoil" of air between the rows. Which aids in seasoning the wood. The outer rows had sunlight. One time a few years ago a neighbor was I'll and his grandson came and cut firewood for him in october. It was all green, so what we did was load a 20' piece of 7ft drain pipe he had lying around with wood stacked in single rows with a foot of space above and a few inches between. Than he had a 1000gallon propane tank about 75 percent full at least 10 years old that was used for drying corn when he farmed. So I took the drier from the bin and made a mount for it from scrap tin and angle on the one end and took two partial sheets of plywood to cover the end up mostly. Basically we made a kiln, worked pretty slick for the most part. Loaded it up about five times and he had his firewood for the season...