What Is Iroko Wood?

We build our swing frames from a single material: iroko. It is also the question our customers ask most — 'what kind of wood is iroko?' This guide answers without marketing language: botanical origin, measurable technical properties, and an outdoor track record spanning more than half a century.

Iroko (Milicia excelsa) is a hardwood native to the tropical belt of West and Central Africa. With a density of ~660 kg/m³, natural silica content and EN 350 Class 1-2 natural durability, it lasts for decades outdoors without chemical treatment. It shares teak's service class — hence the name 'African teak' — and is the classic material of boat decks, piers and laboratory benches. That is exactly why we chose it for garden swings: a material that outlives the product.

1. Origin and Botany: Africa's 'Iron Tree'

Iroko's scientific name is Milicia excelsa (Chlorophora excelsa in older literature). It grows naturally across the tropical belt from Sierra Leone to Tanzania — notably Ghana, Ivory Coast, Cameroon and the Congo basin. Mature trees reach 30-50 metres; the branch-free trunk can exceed 20 metres, which means long, knot-free timber.

Local African names include 'odum' and 'mvule'; European trade has known it as iroko for over a century. Its maritime reputation is practical:

• Boat decks: Alongside teak, one of the two most trusted woods under salt water and constant sun.
• Piers and dock decking: One of the rare species used untreated in structures half-submerged in water.
• Laboratory benches: Its resistance to acids and chemicals made it the standard school and lab bench material throughout the 20th century.

A material's true reference is not a lab report but its record. Iroko's record: century-old piers, boats still afloat, benches still in use.

2. Technical Properties: Iroko in Numbers

Three measures matter in outdoor timber: density (impact and wear resistance), natural durability class (untreated resistance to decay) and dimensional stability (movement across humidity cycles). Iroko sits in the top band of all three:

• Density ~660 kg/m³: Well above Scots pine (~520), practically equal to teak (~655). Excellent screw-holding and impact resistance.
• Janka hardness ~1260 lbf (~5600 N): Everyday scratches and pet claws struggle to mark the surface.
• EN 350 natural durability Class 1-2: The top durability band — no preservative chemicals needed against fungi and insects.
• Natural silica and mineral content: Silica deposited between the fibres armours the wood from within against pests and abrasion (the same content blunts cutting tools, which is why iroko machining takes experience).
• Low movement coefficient: Properly dried iroko moves about as little as teak and noticeably less than oak across humidity cycles — low risk of cracks and gaps in wide panels.

In practice these numbers mean: a properly dried, properly finished iroko frame keeps its structural life in the 25-50 year band in every climate in Turkey.

3. Iroko Outdoors: Sun, Rain, Patina

For a species that evolved under equatorial sun, the Turkish climate is not a challenge. Still, we like to describe its outdoor behaviour plainly, in three points:

• UV behaviour: Iroko does not degrade structurally in sunlight; left unprotected, the surface colour weathers to a silver-grey patina over time. That is not damage but a cosmetic choice — the grey decks of teak yachts are the same phenomenon.
• Water and humidity: The dense fibre structure does not hold water at the surface; with the right finish (a penetrating oil that leaves no film) the wood breathes — no mould, no swelling.
• Finish choice: We use Italian teak oil: it penetrates the wood, is refreshed with a brush once a year, and never needs stripping. Our varnish-versus-oil guide covers the comparison in detail.

In short: outdoors, iroko needs not 'maintenance' but one afternoon of refreshing per year. The material handles the rest itself.

Iroko's identity card

Why we build the swing from iroko

A garden swing is the toughest scenario in outdoor furniture: it stays outside permanently, carries dynamic loads, and its frame works under human weight every day. In this scenario, saving on material means saving on the product itself.

Choosing iroko is not romantic — it is an engineering decision: teak-class durability, more accessible cost than teak, and a proven open-air record. We build the frame from solid iroko, finish it with Italian teak oil and deliver with a 2-year warranty — the material's real life is far longer than the warranty.

If you would like to see iroko side by side with teak and acacia before deciding, our comparison guide exists precisely for that.

Iroko, Teak and Acacia: Which Wood for a Garden Swing? →

You have seen the material. Now the models.

Solid iroko frame + Italian teak oil finish. Mihenk, Lavinya and Almila — three models, one material discipline. Free delivery across Turkey, 2-year warranty.