Timber choice


Timber Choice

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Every project starts with the same question: what does this timber need to survive? Exposure, load, movement and finish all point to a different species. Below is our working reference — the timbers we specify most often, and where each one earns its place.

Accoya Approved Manufacturer

Accoya

Accoya is radiata pine put through an acetylation process that permanently changes its cell structure, so the timber stops absorbing and releasing moisture the way untreated wood does. The result is a softwood that outperforms most hardwoods for stability and decay resistance — with a 50-year above-ground guarantee — while machining, glueing and finishing like a well-behaved softwood.

As an Accoya Approved Manufacturer, we specify it routinely for external doors, windows and frames where movement and rot are the real risks — a lower-impact, FSC-certified alternative to slow-grown tropical hardwood.

Read why we specify Accoya for window replacement →

Hardwoods

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Windows, doors, high-class joinery

European Oak

Interior & exteriorHigh-class joinery

The benchmark for staircases, cabinetmaking and ecclesiastical work — pews, screens, carving. Strong, durable and ages to a rich, dignified colour.

American White Oak

Interior & exteriorClosed grain structure

The most valuable of the white oaks, with a denser, closed cellular structure (tyloses) than red oak varieties. As with any timber, performance outdoors depends on correct detailing, finishing and ongoing maintenance.

Sapele

Interior & exteriorFine grain

Deep reddish-brown heartwood with a cedar-like scent when cut. Works cleanly by hand or machine — a firm favourite if you do not want Accoya.

Iroko

Interior & exteriorDarkens over time

Known as African Teak — nearly as durable, though less dimensionally stable. Starts yellow and deepens to rich brown; can carry hard calcium deposits that darken the surrounding grain.

Utile

Interior & exteriorMahogany type

Sometimes called Sipo Mahogany, related to the true mahoganies and arguably the finest available today. Suits furniture, worktops and high-class exterior joinery alike.

American White Ash

Interior onlyStrong & straight-grained

White, dense and straight-grained. Perishes quickly in ground contact, so we keep it indoors — furniture and internal joinery are its natural home.

Beech

Interior onlyEasy to work

Fine, short grain that machines cleanly, especially once steamed. Resists compression and splitting well — equally at home in furniture or stairs.

Birch

Interior onlyVeneer & ply

Pale, fine-grained hardwood. Birch ply is among the strongest, most dimensionally stable plywoods available — just not for exterior use.

Tulipwood (Poplar)

Interior onlyStable & light

A fine-grained, stable and easy-working timber, despite technically being a hardwood. A dependable choice for cabinet work, framing and painted furniture.

Softwoods & Structural

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Internal doors, internal woodwork and mouldings

Douglas Fir

StructuralNot for external doors

A high-load structural softwood used extensively in construction. Strong and reliable in the right application, but we wouldn’t specify it for external doors.

Western Red Cedar

ExteriorNaturally durable

Tight, straight grain with few knots and genuine natural decay resistance. Built for posts, decking, fencing and shingles — weathers to a distinctive silver-grey.

Modified & Engineered

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Stability by design, not just by species

MDF

Interior onlyMade from waste timber

Wood fibre residuals bonded under heat and pressure into a dense, uniform panel. Ideal for shelving, mouldings and internal joinery; moisture-resistant grades are available.

Tricoya

Interior & exteriorAccoya technology

An acetylated MDF-grade panel — the same acetylation technology behind Accoya, built into board form. Where standard MDF fails outdoors within a few years, Tricoya carries a genuine long-term exterior guarantee, making it our choice for fascias, soffits, cladding and other panel work MDF can’t handle.

Engineered / Finger-Jointed Timber

Interior & exteriorKnot-free lengths

Finger-jointing removes the weak points — knots, splits, staining — and produces long, stable lengths timber can’t offer on its own, opening up applications solid sections can’t reach.

Not sure which timber suits your project?

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Exposure, budget and finish all change the answer. Tell us what you’re building and we’ll recommend the right material for it.

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Timber is a natural material. Even when correctly specified, finished and maintained, it will move — expanding, contracting and settling slightly with seasonal changes in temperature and humidity. This is normal, expected behaviour, not a defect.