Split it in spring or you'll burn wet wood in December

A cord of red oak split on the first warm Saturday in April won't be ready this Christmas. It'll be ready the Christmas after. That's the single fact most people learn too late, usually in November, standing over a stove that hisses and smokes and puts out almost no heat.

So the work starts with the calendar. Ash, birch, poplar and most softwoods, split small and stacked properly in April, will burn by the following winter. Oak, hickory, beech and elm want two summers. Not two winters. Summers do the drying.

A cord is 128 cubic feet stacked tight: four feet high, four feet deep, eight feet long. If somebody sells you a "rick" or a "face cord," that's one row, usually eight feet long by four feet high, and the depth is whatever your stove length is. At 16-inch lengths that's about a third of a cord. Get that clear before money changes hands.

Cut to length before you split anything

Measure the inside of your firebox front to back, then subtract two or three inches. Most stoves take 16-inch splits. Some take 20. Cutting everything to 16 inches is the safe default, and it's also the length that fits almost every insert, fireplace and outdoor pit you'll ever load.

Consistency matters more than the exact number. A stack of mixed 14s and 19s won't sit flat, won't stay up past three feet, and leaves you rolling pieces sideways in the stove door at two in the morning.

Mark your bar with a wrap of tape, or lay a stick on the log and eyeball off that. Don't trust your stride.

Safety, the parts people skip

Chainsaw first. Chaps, eye protection, ears, and steel-toe if you have it. Cut on sawhorses or on a log deck, never with the tip of the bar poking into unseen ground. Kickback comes from the upper quadrant of the bar tip catching something. Know where your tip is at all times.

Splitting has its own rules and they're simpler.

Set the block low. A chopping block that's knee height or a little below. Waist-high blocks feel comfortable and they aim the miss straight at your shins. Low block, and a miss buries the head in the ground in front of you.

Stand square, feet apart, arms relaxed. Let the head do the work. Guys who muscle it get sore shoulders and split less wood.

Clear an arc. Nothing behind you. Nobody within twenty feet. Pieces fly sideways when they let go, and they fly fast.

If you use steel wedges, grind the mushroom off the head. A mushroomed wedge throws steel splinters. Strike wedges with the poll of a maul or a sledge, never with the back of an axe.

Gloves are your call. They save blisters and cost you some feel on the handle. I split bare-handed until the hands harden up, then it stops being an issue.

Reading the round

Stand the round on the block and look at the top face. You'll see checks, the cracks radiating out from the center as the wood dried. Aim for one. Wood wants to split along those lines and you're just finishing what the tree started.

Avoid knots. A knot is where a branch was, and the grain there runs in two directions at once. Go around it, taking slabs off the outside instead of driving through the middle.

Big rounds, anything over about 18 inches across, shouldn't be attacked through the center. Work the edges. Take a four-inch slab off one side, rotate, take another. You'll get through a 24-inch oak round in a dozen swings that way and never once bury the maul to the handle.

Elm is stringy, interlocked and miserable. If you've got a pile of elm, that's the argument for a hydraulic splitter. Everything else a six-pound maul handles fine.

Split smaller than you think. Faces of four to six inches across. Every split face is an escape route for water, and bark is a raincoat. A round left whole can sit outside for three years and still be wet in the middle.

An old tire laid flat on the block, rounds stood inside it, keeps the pieces from toppling after each swing. It cuts your bending in half. Best five minutes of setup in the whole job.

Where the stack goes

This decides whether any of it works.

Off the ground. Always. Pallets are free behind most building supply yards, or run two lengths of 4x4 or a couple of old fence rails parallel on the dirt. Wood in contact with soil wicks moisture up and rots from the bottom row. You'll find punky gray pieces crawling with sowbugs.

In the open, with wind across it. Wind does more drying than sun does. Find the direction your prevailing wind comes from and run the row so that wind hits the long face of the stack, not the end. A stack tucked into a sheltered corner behind the garage will still be wet in October.

Away from the house. At least a few feet, ideally more. Stacked against siding you're inviting carpenter ants, termites and mice right to the wall, and you're trapping moisture against the cladding.

Single rows, not a big square block. One row deep, four feet high, as long as you need. A double-wide stack dries at maybe half the rate because the inner faces see no air.

Building it so it stands

Start with the ends. Crib them: lay two pieces side by side, then two more across on top at ninety degrees, alternating up like a log cabin corner. That locks the ends and you don't need posts.

Fill between the cribs with the splits laid the same direction, bark side up on the top course so water sheds off. Leave gaps. The old line is that a mouse should be able to run through the stack and a cat should be able to chase it. That's about right.

Don't go higher than four feet unless the ends are properly posted. A collapsing stack is heavy and it always seems to happen when a kid is nearby.

Cover the top. Only the top.

This is the mistake that ruins more firewood than everything else combined. A tarp wrapped over the whole stack and bungeed down the sides turns your woodpile into a sweat lodge. Moisture comes out of the wood, hits the underside of the plastic, condenses, and runs back in. You'll open it in December to find mold and wood that's wetter than the day you split it.

Cover the top 12 inches or so of the stack and let the sides breathe. Scrap metal roofing is ideal, weighted with a couple of splits. A tarp folded to cover only the crown works too, with an overhang past the front face so rain drips clear.

Knowing when it's ready

A moisture meter is the honest answer, and it's the cheapest tool in this whole article. But use it properly: take a split off the stack, bust it open, and test the fresh interior face, pins across the grain. The outside of any piece reads dry after a sunny afternoon and tells you nothing.

Under 20 percent and you're good. Twenty-five and it'll burn badly and coat your flue with creosote.

Without a meter, go by the tells. Seasoned wood is noticeably lighter in the hand. The ends are checked and cracked. Bark is loose or falling off. Knock two pieces together and you get a sharp clack rather than a dull thud.

Bring a week's worth inside a few days ahead of burning. Even properly seasoned wood picks up surface damp from a wet week, and four days by the stove pulls that last bit out.

Now stack next year's while you're standing there. The whole trick is being a year ahead, and the only way to get a year ahead is to do it once when you don't need to.