Subject

Forestry & Lumber

Forestry and lumber is the management of trees as a renewable crop and the business of converting them into timber, firewood and material that can be used and replaced.

Handled properly a woodland yields indefinitely, which is why it was managed rather than harvested for most of the last thousand years.

A woodland is a crop with a long rotation

The modern picture of trees is binary: they're either standing or they've been cut down, and cutting is loss. That's a recent way of seeing it, and it's not how anyone who actually depended on wood ever thought.

A managed woodland produces continuously. Coppicing takes a crop of poles from the same stools for centuries; thinning improves what's left; selective felling takes the mature stems and leaves the stand. Some of the most biologically rich woodlands in the world are the ones that have been worked longest, because the working created the structure.

Which matters practically, because wood is the one structural material a household can genuinely produce for itself. It grows back, it needs no fuel to make, and it can be converted with hand tools. A holding with managed trees on it has a supply of building material, fuel, fencing and tool handles that renews itself.

Knowing what the tree is for

Species differ enormously in what they're good at, and matching the tree to the job is the whole of the knowledge.

The properties that matter are durability in contact with ground and weather, strength for its weight, how it works under tools, how it moves as it dries, how it splits, and how it burns. Those vary independently: a timber can be strong and rot quickly, or durable and difficult to work, or easy to work and hopeless outdoors.

Some rough distinctions travel everywhere. Heartwood is durable and sapwood generally isn't, in every species. Dense timbers are usually stronger and harder to work. Straight-grained material splits cleanly and is what you want for anything riven or cleft. Resinous species light easily and burn fast.

What doesn't travel is the species list, because the useful trees where you are may not exist somewhere else. The transferable skill is knowing which properties you need for a job and then finding out which local trees have them.

Managing a stand instead of clearing it

The systems that produced timber for centuries all share one idea: take a portion, keep the structure, let it regrow.

Coppicing cuts broadleaved species close to the ground and lets them regrow from the stool as multiple stems. On a rotation it yields poles, fuel, fencing, tool handles and craft material indefinitely, and the stools can outlive many human generations. Pollarding does the same higher up, out of reach of grazing animals.

Continuous cover forestry takes mature stems selectively and never opens the canopy fully, so the woodland is always a woodland and regeneration happens under the shelter of what's left. It's slower to yield and far more stable than clearing and replanting.

Thinning is the least visible and most valuable operation. Removing poor and crowded stems early puts all the growth into the ones you're keeping, and a stand thinned properly at the right age produces better timber decades later. Neglect it and you get a lot of thin drawn stems, none of them worth much.

Felling, which is where the danger is

This is the most hazardous operation on most holdings and the one most commonly done by people who've never been taught.

The physics are simple to state: a tree falls where its weight and the wind take it unless the cut controls it, and the hinge of uncut wood left between the face cut and the back cut is what steers it. Cut the hinge through and control is gone.

Assessment comes before any cutting. Lean, crown weight, wind, dead limbs overhead, what the tree will hit, what's behind you, and a cleared escape route away from the fall line. Most serious injuries come from something other than the trunk: a dropping limb, the butt kicking back, a tree hanging up in another, or a stem under tension releasing when it's cut.

Anything hung up, leaning hard the wrong way, dead, or near a building or a line belongs to someone trained and equipped. There's no version of that where the saving is worth it. And learn this from a person, on a course, not from a page.

Converting a log into boards

How a log is cut decides how the boards will behave, which is why this belongs with the woodwork, not after it.

Cutting straight through produces mostly flat-sawn boards, which are wider, quicker to get and move more across their width. Quarter sawing takes more work and waste and produces boards that are more stable, wear better and show the ray figure in species that have it. Choosing between them is choosing what the timber will do later.

Riving is the oldest conversion and still the best for some purposes. Splitting along the grain instead of sawing across it follows the fibres, so the resulting piece is far stronger than a sawn one of the same size. That's why cleft fencing, shingles, ladder rungs and chair parts were traditionally riven.

At small scale the practical options are a chainsaw mill, a portable band mill, a pit saw, or riving with wedges and a froe. Each has a different balance of speed, waste and equipment, and all of them convert a log a household already has into material it would otherwise buy.

Seasoning and stacking

Freshly cut timber is full of water, and how it comes down to a workable moisture content decides whether it's useful or firewood.

Air drying is the traditional method and it's mostly about airflow and patience. Stack off the ground, on a level bearing, with stickers of even thickness between every layer aligned vertically so the weight transfers straight down, under cover from rain and sun but open to the wind. Uneven stickers cause permanent distortion, and unstickered stacking causes staining and rot.

Drying too fast splits timber, particularly at the ends where moisture leaves fastest. Sealing the end grain slows that and is worth doing as soon as the log is cut.

Time depends on thickness, species and climate far too much for any general figure to be useful, and the old rule of a year per inch is a rough guide for temperate air drying and no more. The reliable method is to weigh a sample piece repeatedly: when it stops losing weight, it's reached equilibrium with where it's stored.

Firewood, and getting the most out of it

For many households this is the main product, and there's more in it than cutting and burning.

Dry wood is the whole game. Green wood carries a great deal of water, and burning it spends much of the heat evaporating that water instead of warming the room, while the cooler smoky fire deposits creosote in the flue, which is the main cause of chimney fires. Season it properly and split it, because split wood dries far faster than round.

Species differ in density and therefore in heat per volume, and in how they burn. Dense hardwoods burn long and steady and are worth the wait; lighter and resinous species light easily and burn fast, which makes them kindling instead of fuel. What's available locally decides the mix.

Stacked well, off the ground, with air through it and the top covered, wood keeps improving. Stacked badly it rots, and a rotten stack is a season's work wasted.

Or tell us what you need

This form isn't accepting submissions yet.

Questions

How long does timber take to season?
It depends on thickness, species and climate far too much for a single figure to be meaningful. The old rule of a year per inch describes temperate air drying and travels badly. The reliable method is to weigh a sample piece from the same stack every few weeks: when it stops losing weight it's in equilibrium with where it's stored, which is what you actually need to know.
Is cutting trees down bad for the woodland?
Not inherently, and managed cutting is frequently what keeps a woodland rich. Coppicing, thinning and selective felling all take a crop while keeping the structure, and some of the most biologically diverse woodlands in the world are the ones worked longest. Clearing a stand entirely is a different act with different consequences, and the distinction is between managing and removing.
Can I mill my own timber without a sawmill?
Yes, by several routes. A chainsaw mill attachment converts logs where they lie, a pit saw does it with two people and no power, and riving with wedges and a froe splits along the grain and produces stronger material than sawing for anything that will be stressed. Each trades speed against equipment, and all of them turn a log you already have into material you would otherwise buy.
Why does my firewood burn badly?
Almost always because it's still wet. Green wood spends much of its heat evaporating its own water, burns cool and smoky, and deposits creosote in the flue, which is the main cause of chimney fires. Split it, stack it off the ground with air through it and the top covered, and give it the time its thickness and species need.
More questions, and every other subject, in the FAQ.

The library is how this gets written

The Ark is a library of practical knowledge that was ordinary once and isn't any more, being recovered from the sources that recorded it while it was still in use. Membership is what pays for that work, and it's what decides how fast subjects like this one get written.

See what membership includes

The Ark of Forgotten Knowledge Podcast

0:000:00