Is second-hand timber worth buying? A furniture maker’s honest guide

By Dave Campbell · 24 August 2026

I build high-end furniture out of Brisbane, and most of it starts as reclaimed or surplus timber - boards that spent sixty years as floor joists, slabs from over-ordered jobs, species you can't buy new anymore. Bought right, this timber isn't a compromise; it's better material than money normally gets you, brought back to life.

And honestly, the hardest part was never the buying - it's the finding. Interesting species scattered across a dozen Marketplace ads, mills an hour's drive apart, and anything half-decent priced like it's rare art. That's half the reason I built the Heap: one place to search, filters that get you straight to the species, size and length you're after, and it's often the mills and original buyers themselves selling - so the price is what timber should cost, not what a middleman reckons you'll pay.

Enough about that though. Here's how you actually buy second-hand timber without getting burnt.

The thing nobody tells you: timber has to be DRY before you use it

This mistake ruins more projects than rot and borer combined. Timber is either kiln-dried (KD) or air-dried over years - if it's neither, it's "green," and green timber shrinks, cups and splits as it dries in your project. The slab that was flat when you bought it potato-chips on your bench. The gap-free deck opens 3mm gaps by summer.

Ask every seller: "kiln dried or air dried, and when was it milled?" Anyone who knows timber has an answer. Surplus new decking or flooring from a merchant is almost always KD - safe. A slab chainsawed off a backyard tree last month is green: it needs roughly a year of stickered air-drying per 25mm of thickness, so a 50mm slab is a two-year wait or a trip to someone with a kiln.
Reclaimed timber from old structures is the exception in your favour - a board that spent decades as a joist is as dry and stable as timber gets. It's done all the moving it will ever do. That's exactly why makers hunt old-growth reclaimed stock.
Buy a moisture meter - $30-60 at any tool shop, the best cheap tool a timber buyer owns. Aim for roughly 10-14% for indoor furniture in Queensland, up to ~15-18% for outdoor work. Over 20% isn't ready.
Let boards acclimatise in the room or climate where they'll live for a week or two before machining or laying. Timber moves with humidity; let it settle where it's staying.

Rough sawn vs DAR - and which to buy

Second-hand timber comes two ways, and the price difference is real:

DAR ("dressed all round") - machined smooth and square on all four faces, ready to use at its stated size. You pay for that convenience.
Rough sawn - straight off the mill blade: fuzzy, slightly oversize, often a bit wavy. Cheaper per metre, and reclaimed stock is usually somewhere between: once-dressed timber that's weathered, painted or cupped, needing re-dressing.

Which to buy: if you have no machines and need it ready to go, pay for DAR - the premium is cheaper than the tools. If you can dress it yourself, rough sawn is where the value lives - you're buying timber other people scroll past, and a board that costs half as much because it looks grey and fuzzy cleans up into the same (often better) timber. One trap: rough sawn is quoted at nominal size and loses a few mm per face in dressing - a rough 100×50 finishes around 90×42. Buy oversize for what you need to end up with.

How to mill rough or reclaimed timber (the sequence matters)

The order isn't optional - each step depends on the one before:

Metal hunt first. Every nail you miss destroys blades and planer knives. Visual check, then a $40 handheld metal detector for anything reclaimed. Non-negotiable.
Rough-cut to length (a bit over final size) - shorter boards are easier to flatten and you waste less thickness chasing bow out of a long board.
Face joint - one face dead flat on the jointer, no rocking.
Edge joint - one edge square to that flat face.
Thickness - through the thicknesser, flat face down, until parallel and at final size.
Rip to width on the table saw, jointed edge against the fence.

That's the jointer → thicknesser → table saw trio, and it's the honest reason makers own them.

No machines? You still have options

Hand planes - a No. 5 or 6 flattens a face the way it's been done for centuries. Slow, learnable, deeply satisfying, and a decent second-hand Stanley costs less than a night out.
A router sled - the budget slab-flattener: a router riding a rail bridge over the board, taking passes until flat. Slow but effective, handles slabs wider than any jointer, and the rig builds from offcuts plus a $150 router.
Thicknesser + sled trick - own only a thicknesser? Shim the board rock-free on a flat sled, run it through to flatten the top, flip, run normally. A jointer's result without a jointer.
Pay someone - timber yards, men's sheds and cabinet shops will dress a stack for a modest fee. Ring around: $50 to have your timber machined flat is often the best money in the whole project.
Or skip the problem - buy DAR or surplus new stock and start building today. Sometimes the project matters more than the process.

Grading: when second-hand is fine and when it isn't

For furniture, decks, garden beds, feature walls, benchtops - grade stamps don't matter; your eyes and thumbnail do. But if an engineer or certifier has specified stress-graded timber (F17, MGP10 and so on) for load-bearing framing, unstamped reclaimed timber is a certification problem regardless of how solid it is. Ask your certifier before you buy - plenty accept oversized reclaimed hardwood on inspection; some won't.

The five-minute inspection

Sight down the board like a rifle barrel. Gentle bow machines out; corkscrew twist doesn't - leave it.
Thumbnail test - press hard into the face. Sound hardwood barely marks; soft damp denting means rot. Walk away.
Borer: old vs active. Dark empty holes = history, mostly character. Pale clean holes with fine powder (frass) = active - don't bring it home, it spreads to your good stock.
End checks - splits at the ends are normal and get docked; just confirm the split doesn't travel a third of the board. A 3m board with a 1m check is a 2m board - price it that way.
Fixings count - a few nail holes are story; a board bristling with bolts is an hour of metal-hunting. Price your time.

What's worth buying

Buy with confidence: surplus new stock (over-ordered decking and flooring packs - KD, untouched, 30-50% under retail, the best value on any marketplace). Reclaimed old-growth hardwood (tallowwood, crow's ash, proper ironbark - denser and more stable than anything in commercial supply, and mostly unbuyable new). Big sections and wide boards generally.

Think twice: green slabs at "bargain" prices unless you're knowingly buying a two-year drying project. Heavily fixed demo timber if you're paying by the hour to denail it. Anything you can't inspect.

Rough Brisbane prices

Surplus new hardwood decking: 30-50% under retail. Reclaimed structural hardwood: commonly $5-15/lineal metre by section and species. Old-growth slabs and wide boards: cheap against new equivalents, never cheap outright - a too-good slab price usually means green or cracked.

The verdict

Surplus new stock: buy it, it's just retail cheaper. Reclaimed old-growth: the material money can't normally access - check moisture and metal, then bring it back to life. Green timber: only if you're deliberately buying a drying project. And the one question that sorts every seller instantly: "kiln dried or air dried, and when was it milled?"

Got timber in the shed from your own job? Someone needs exactly what you've got. Chuck it on the Heap.