How long does firewood need to season?

Most hardwoods need 12-24 months of air drying to reach the target moisture content of 20% or less. Softwoods like pine and fir season faster, typically 6-12 months. Some dense hardwoods like oak can take up to two full years. The key is splitting before stacking, because split wood dries much faster than rounds. A moisture meter ($15-$25 at any hardware store) takes the guesswork out: split a piece, test the freshly exposed face, and if it reads 20% or below, it is ready to burn.

How much firewood do I need for a winter?

A household using wood as its primary heat source in a cold climate typically burns 3-5 cords per season. As supplemental heat (evenings and weekends with a central furnace doing the rest), 1-2 cords is common. A cord is a stacked pile measuring 4 feet high, 4 feet deep, and 8 feet long, equaling 128 cubic feet. Actual consumption depends on your stove's efficiency, home insulation, winter severity, wood species, and how hot you run the stove. Track your first season's consumption rather than relying on estimates.

What is the best firewood to burn?

The best firewood is dry firewood. Species matters less than moisture content. Dense hardwoods produce more heat per volume: osage orange leads at approximately 32.9 million BTU per cord, followed by shagbark hickory (27.7), white oak (25.7), sugar maple (24.0), and red oak (24.6). These dense hardwoods also produce long-lasting coals. Softwoods like pine ignite easily and are good for starting fires but burn faster and produce less heat per cord. Most people burn whatever grows locally. A mix of hardwood for sustained heat and softwood for easy starts is practical.

Can I burn freshly cut wood?

You can, but you should not. Green wood has a moisture content of 50-60%. Burning it wastes energy boiling off water, produces heavy smoke, creates rapid creosote buildup in the chimney (a fire hazard), and coats the stove glass. A stove fed green wood runs at a fraction of its rated efficiency and dramatically increases the risk of a chimney fire. Season your wood to 20% moisture content or below before burning. Kiln-dried firewood is available as a gap-filler when your seasoned supply runs out, though it costs significantly more.

How should I store firewood?

Store firewood raised off the ground on pallets or a log rack, with the top covered and the sides open. The cover keeps rain and snow off while open sides allow airflow for continued drying. Store the main woodpile at least 20-30 feet from the house to reduce insect and rodent risk and keep fire fuel away from the structure. Keep a smaller two-day supply closer to the door for convenience. Never store large quantities of firewood indoors, as it can harbor insects and moisture.

Firewood: Species, Seasoning, Splitting, and Storage

FROM THE FIELD

The wood you burn this winter was decided a year or two ago. First-year wood burners describe the same lesson in account after account: they bought loads sold as seasoned, found the fire sulking and the chimney fouling within weeks, and spent the winter burning around wet wood while they started next year's pile. The households that settle into wood heat stop buying for this winter and start working a season ahead. This page covers the fuel side of that shift: species, seasoning, storage, and how to know what you actually have.

The foundation

Your stove is only as good as your firewood

Every wood heating guide starts with the stove. This one starts with the fuel. The best EPA-certified stove in the world runs poorly on green wood, produces heavy creosote on wet wood, and barely throws heat on punky, half-rotted rounds. The stove is engineered to burn dry, split hardwood. Give it that, and it performs. Give it anything else, and you get smoke, creosote, poor heat, and accelerated chimney maintenance.

Firewood is also the one part of wood heating that depends entirely on your effort and planning. You can buy a stove once. You need firewood every year. Whether you buy it by the cord, cut it from your own land, or gather deadfall from a national forest, the same rules apply: the right species, properly seasoned, correctly stored, ready when you need it.

Species selection

Which wood burns best

Dry wood is always better than wet wood, regardless of species. That said, species determines heat output per cord, coal quality, ease of splitting, and how fast the wood seasons. Dense hardwoods produce more heat per volume. Softwoods ignite easily and are useful for starting fires.

Species	Million BTU/cord	Coaling quality	Splitting	Notes
Osage orange	32.9	Excellent	Difficult	Hottest-burning common species. Throws sparks; best for stoves, not open fireplaces.
Shagbark hickory	27.7	Excellent	Moderate	Premium firewood where available. Long burns, outstanding coals.
White oak	25.7	Excellent	Moderate	The standard benchmark. Widely available east of the Rockies.
Red oak	24.6	Good	Easy	Splits well, seasons relatively fast for an oak. Widely available.
Sugar maple	24.0	Good	Moderate	Clean-burning, steady heat. Common in the Northeast and Upper Midwest.
White ash	23.6	Good	Easy	Splits very easily, seasons relatively fast. Low moisture content when green.
Black cherry	20.4	Fair	Easy	Pleasant aroma. Good for shoulder-season fires and blending with denser species.
Douglas fir	20.7	Fair	Easy	Best of the softwoods for heat. Widely available in the West.
Eastern white pine	15.9	Poor	Very easy	Easy to light, good kindling wood. Burns fast with little coaling.

BTU values from USDA Forest Products Laboratory data and state cooperative extension publications. Values are approximate and vary with moisture content.

Practical advice on species selection

Burn what grows locally and what you can get at a reasonable price. If you are in oak and hickory country, that is your primary fuel. If you are in the Pacific Northwest, Douglas fir is excellent. The species chart helps you understand relative heat output, but availability and cost matter more than chasing the highest BTU number. A mixed load of dry hardwood outperforms a load of the "best" species that is still green.

Seasoning

Drying your wood from green to ready

Freshly cut wood contains 50-60% moisture by weight. Burning it wastes energy boiling off water, produces heavy smoke, and deposits creosote rapidly in the chimney. The target moisture content for burning is 20% or below. Getting there takes time, but the process is simple: split, stack, wait.

Seasoning times by species type

Softwoods (pine, fir, spruce): 6-12 months. Lower density means faster drying.
Medium hardwoods (ash, cherry, maple): 12-18 months. Ash is the fastest-seasoning hardwood because its green moisture content is already lower than most species.
Dense hardwoods (oak, hickory, osage orange): 18-24 months, sometimes longer. Oak in particular can take two full years in humid climates.

What speeds seasoning

Split before stacking. This is the single most important step. Split wood dries dramatically faster than rounds because the exposed inner faces release moisture. Rounds can stay wet inside for years.
Cut in late winter or early spring. Trees cut when sap is at its lowest start with less moisture.
Stack with airflow. Leave gaps between pieces. Orient stacks perpendicular to prevailing wind where possible.
Cover the top, not the sides. A tarp or sheet metal keeps rain off the top. Open sides allow air circulation. A fully tarped stack traps moisture.

The moisture meter

A pin-type moisture meter costs $15-$25 at any hardware store and eliminates guessing. To get an accurate reading, split a piece of wood and test the freshly exposed interior face, not the bark or weathered surface. The surface can read dry while the interior is still wet. If the meter reads 20% or below on the split face, the wood is ready to burn. This is the single cheapest and most useful tool in the firewood process.

From the field · One reading is one piece. Accounts describe the same split reading dry on the outside and wet at the core, and stacks that dry unevenly from the outer rows inward. Test several splits from different parts of the pile before trusting the whole thing.

Signs your wood is seasoned

Cracks (checks) visible on the end grain
Bark loosening or peeling
Gray, weathered appearance on the outer surface
Lightweight compared to green wood of the same species
Two pieces knocked together sound hollow, not dull
Moisture meter reads 20% or below on a freshly split face

Splitting

Tools, technique, and safety

Splitting wood serves two purposes: it speeds seasoning by exposing the interior to air, and it sizes the wood to fit your stove's firebox. Most stoves take pieces 3-6 inches across.

Splitting maul

A 6-8 pound maul with a wedge-shaped head is the standard splitting tool. The weight does the work. For most households processing a few cords a year, a maul and a chopping block are all you need.

Splitting axe

Lighter than a maul (3-5 pounds) with a thinner wedge profile. Better for straight-grained, easy-splitting species. Less effective on knotty or twisted grain.

Hydraulic log splitter

A powered machine that forces a wedge through the log. Makes sense if you process large volumes (5+ cords per year), deal with difficult species (elm, gum), or have physical limitations that make hand-splitting impractical. Can be rented or shared with neighbors.

Wedges and sledgehammer

Steel splitting wedges driven with a sledgehammer handle the rounds that a maul bounces off: large-diameter, knotty, or twisted-grain pieces. Every wood-splitter should own at least two wedges.

Splitting safety

Work on a solid chopping block (a flat-cut hardwood section, 12-18 inches tall)
Wear safety glasses or a face shield. Wood chips and bark fly unpredictably.
Wear steel-toed boots. A glancing maul strike can hit your foot.
Stand with feet shoulder-width apart. Aim your swing so a miss goes into the chopping block, not your shins.
Clear the area around you. No one within the swing radius.

For more on hand tools and safe technique, see Axes, Saws, and Clearing.

Storage

Stacking, covering, and protecting your supply

Proper storage continues the seasoning process and protects your investment. Poorly stored wood absorbs moisture, grows mold, harbors insects, and can become a fire hazard next to the house.

The four rules of firewood storage

1Off the ground. Stack on pallets, a gravel pad, or a log rack. Ground contact wicks moisture into the bottom row and accelerates rot.
2Top covered, sides open. A cover keeps rain and snow off the stack. Open sides allow airflow. A fully wrapped tarp traps moisture and promotes mold.
3Away from the house. The main woodpile should be 20-30 feet from the house. This reduces pest entry risk and keeps combustible fuel away from the structure.
4Two-day supply near the door. Keep a small supply close for convenience. Restock from the main pile regularly.

How to stack

Stack wood in rows no more than 4 feet high. A single row allows maximum airflow. If you stack multiple rows, leave 3-6 inches between rows. Place bark-side up on the top row so bark sheds water naturally. Keep the ends stable with a crisscross pattern or log rack.

Indoor storage

Never store large quantities of firewood indoors. Wood harbors insects (including carpenter ants, bark beetles, and spiders), and the warmth of your house can cause dormant larvae to emerge. Bring in only what you plan to burn that day or the next morning.

Getting your wood

Sourcing, quantity, and cost

Firewood can be purchased, harvested from your own land, or gathered from public lands. Each approach has its own cost, effort, and timeline.

Buying firewood

A cord of seasoned hardwood costs $200-$400 in most regions, with significant variation. Some dealers sell by the "face cord" or "rick" (one-third of a full cord). Make sure you know what unit you are buying.

Buy seasoned, not green, unless you are planning a year or more ahead. Verify with a moisture meter on a split face.

From the field · "Seasoned" is a seller's word, not a measurement. First-year buyers describe load after load advertised that way that metered well above 20 percent on a fresh split. The ones who fared best tested a few splits while the truck was still in the driveway.

Cutting your own

If you have wooded land, your firewood supply is on-site. The costs shift from purchase price to equipment, fuel, and labor. Chainsaw safety is a skill in itself.

For chainsaw work, see Axes, Saws, and Clearing. For managing woodlots, see Rural Acreage.

National Forest permits

Most National Forests sell personal-use firewood permits for $10-$20 per cord, allowing you to harvest dead and downed timber. Contact your local Ranger District for availability. A permit is required; cutting without one is illegal.

Kiln-dried firewood

Kiln-dried wood is heat-treated to 10-15% moisture. It lights instantly and burns hot, but costs significantly more. Useful as a gap-filler when your seasoned supply runs out, or as a fire-starter for cold mornings. Not cost-effective as a primary fuel.

How much do you need?

Primary heat, cold climate (5,500+ HDD): 3-5 cords per season

Primary heat, moderate climate: 2-3 cords per season

Supplemental heat (evenings and weekends): 1-2 cords per season

Occasional use (weekend fires): Under 1 cord per season

A cord is a stacked pile 4 feet high, 4 feet deep, and 8 feet long (128 cubic feet). Track your actual consumption through your first season rather than relying on estimates.

Safety

What not to burn

A wood stove or fireplace is designed to burn natural, untreated wood. Anything else can release toxic fumes, damage the stove, or create a chimney fire.

Never burn these materials

Treated or pressure-treated lumber. Contains arsenic (CCA-treated) or copper compounds that release toxic fumes when burned.
Painted or stained wood. Paint contains lead (in older paint) and other heavy metals that become airborne when burned.
Plywood, particle board, and MDF. The adhesives and resins produce toxic smoke and accelerate creosote buildup.
Garbage, plastic, and household waste. Produces toxic fumes and can damage the stove's catalytic combustor.
Large quantities of cardboard or paper. Burns at high temperatures with large flames that can overheat the chimney and ignite creosote.
Coal in a wood stove (unless the stove is specifically rated for coal). Coal burns hotter than wood and can damage a stove not designed for it.
Driftwood. Salt-saturated wood releases chlorine compounds and corrodes the stove and chimney.

Avoid these

Common firewood mistakes

Starting your firewood supply too late

If you install a wood stove in September and start splitting in October, you will not have seasoned hardwood for that winter. The lead time for seasoned firewood is one to two years. Start your supply the year before you need it. If you are starting from zero, buy seasoned wood for the first winter and begin processing your own supply in parallel.

Stacking rounds instead of splitting first

Whole rounds dry from the ends only. The bark seals moisture inside. An 8-inch-diameter oak round can stay at 40% moisture for years. Split everything before stacking. It dries faster, stacks more compactly, and is ready to burn sooner.

Stacking wood directly against the house

Convenient, but it invites termites, carpenter ants, and rodents directly to your foundation. It also puts a large volume of combustible fuel against your home. Keep the main stack 20-30 feet away. A small two-day supply near the door is fine.

Covering the entire stack with a tarp

A full tarp traps moisture underneath and prevents airflow. The top of the stack gets covered; the sides stay open. Better yet, use a purpose-built firewood rack cover or sheet metal that sheds water without sealing the sides.

Trusting bark and appearance instead of measuring

A piece of wood can look dry on the outside while still holding 40% moisture inside. The only reliable test is a moisture meter on a freshly split face. At $15-$25, a moisture meter is cheaper than one chimney cleaning, and it tells you what you actually have.

Sources

Where this information comes from

USDA Forest Products Laboratory. Wood Handbook: Wood as an Engineering Material. Heating values of common wood species.
University of Maine Cooperative Extension. Heating with Firewood. Seasoning, storage, and species selection guidance.
University of Missouri Extension. Harvesting Firewood from Your Woodlot. Sustainable wood harvesting practices.
USDA Forest Service. Personal Use Firewood Permits. National Forest permit program for dead and downed timber.
U.S. Consumer Product Safety Commission. Wood-Burning Safety. Fire prevention and safe burning practices. cpsc.gov
National Fire Protection Association. NFPA 211. Clearances and safe practices for solid fuel heating.

Wood heat guides