What is the difference between teak and hardwood?
The Wood Guide · Choosing and comparing
Side by sideTeak or hardwood?
Teak is a hardwood — but not just any hardwood. Anyone looking for garden furniture sooner or later runs into the question of why teak costs so much more. The answer lies in four properties.
- Teak: class 1, oil-rich, very stable
- Hardwood: class 1 to 5, widely varying
- The difference is in the maintenance
Teak or hardwood?
Teak is a hardwood — but not just any hardwood. Anyone looking for garden furniture sooner or later runs into the question of why teak costs so much more. The answer lies in four properties.
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Hardwood is not a quality label
It is a botanical category: all wood from broadleaf trees — in technical terms angiosperms, trees with seeds in a fruit or seed case. Oak, walnut, ash and teak all fall under it.
The name is misleading: not every hardwood is harder than softwood. Poplar and balsa are botanically hardwoods but soft and not very hard-wearing. Actual hardness, durability and weather resistance vary enormously from species to species — and that is exactly why "hardwood garden furniture" on its own says little.
The basic classification is explained in hardwood versus softwood and in our guide what is hardwood.
- Oak — tough and durable, popular for structures and floors
- Iroko — African alternative to teak, class 1 to 2
- Mahogany — warm reddish brown, stable, widely used in furniture
- Meranti — South Asian, light in weight, common in outdoor furniture
- Acacia — sturdy, fast-regrowing, affordable alternative to teak
- Walnut — dark and decorative, popular for interiors and veneer
- Poplar and beech — less durable, need extra protection outdoors
The four strengths of teak
Teak grows naturally in the tropical forests of Myanmar, Thailand, Laos and India, and today is grown on plantations in Asia, Africa and Latin America. The tree grows slowly — and it is precisely that slow growth that produces an exceptionally dense, oil-rich structure.
- High natural oil contentTeak naturally contains a lot of oil, which acts as a built-in protective layer against moisture, fungi, insects and rot — without you having to apply anything first. No other common hardwood does this to the same extent: oak, iroko and meranti have much less natural oil and are more sensitive to the weather when untreated.
- Durability class 1The highest class: more than 25 years of expected service life, even in contact with the ground. For comparison: iroko reaches class 1 to 2, oak heartwood class 2, meranti class 3 to 4 and beech class 5.
- Dimensional stabilityTeak barely moves: it shrinks and swells little with changing humidity and temperature. Ideal for precision work such as ship decks, decking and bespoke pieces. Many other hardwoods move more, which loosens joints or opens up gaps.
- Hardness in proportionTeak scores 4,740 N on the Janka scale — solid, but not the hardest hardwood; oak reaches around 5,300 N. What makes teak versatile is the combination: hard enough, relatively light, and excellent to work.
Teak alongside the rest of the family
| Characteristic | Teak | Other hardwoods |
|---|---|---|
| Colour | Golden brown to dark brown; weathers to silver-grey | Widely varying, from light yellow (acacia) to dark red (mahogany) |
| Texture and grain | Moderately coarse, straight grain | Fine to coarse, straight or wavy depending on the species |
| Oil content | High — built-in protection | Low to moderate — extra treatment advisable |
| Durability class | Class 1 (very durable) | Class 1 to 5, depending on the species |
| Janka hardness | 4,740 N | Wide range: beech ±6,000 N, poplar ±1,900 N |
| Stability | Very stable, little movement | Variable — oak and iroko stable, meranti less so |
| Workability | Good, but blunts saw blades because of silica crystals | Varies — oak harder to work, meranti easier |
| Typical uses | Garden furniture, ship decks, decking, luxury interiors | Structures, floors, furniture, window frames, veneer |
| Outdoor maintenance | Minimal — oiling optional, for the colour | More needed for the less durable species |
Acacia and meranti: the usual alternatives
For garden furniture, acacia is the most frequently mentioned alternative. It grows faster, is more readily available and more affordable.
Acacia is sturdy, has an attractive grain and stands up to the outdoors — with a clearly lower durability class than teak and less natural oil. With regular maintenance, acacia garden furniture lasts for years. Everything about it is in the acacia guide.
Meranti is lighter in weight and easy to work, but is usually treated or pressure-treated for good outdoor durability.
"Teak needs no maintenance"
That is only partly true — and that is exactly where the difference with other hardwoods lies.
Maintenance is aesthetic
Teak survives without treatment: it does not rot easily and stays structurally sound. It does, however, turn to a silver-grey patina under UV light. If you want to keep the warm golden-brown colour, oil it once or twice a year — a choice, not a necessity.
Maintenance is functional
With acacia or meranti, regular oiling or varnishing is more than cosmetic. Without protection, moisture penetrates deeper into the wood, increasing the risk of weathering and rot. A good wood oil, matched to species and colour, makes the difference between ten and twenty years of service life.
Which project calls for which wood?
Decades of peace
- You want garden furniture that lasts for decades with minimal maintenance.
- The piece comes into contact with water, moisture or salt — ship deck, pool edge.
- Stability is crucial: a bespoke table or built-in decking.
- You want a timeless, classic look.
Room for maintenance
- You are willing to do a little more maintenance in exchange for a more affordable price.
- The colour or grain of a specific species suits your project better.
- You have a structural use where oak or iroko performs better technically.
- The wood is used indoors, where weather resistance matters less.
Frequently asked questions
Is teak a hardwood?
Yes. Hardwood is a botanical category — wood from broadleaf trees — and teak belongs to it. What sets teak apart within that family is its high natural oil content and durability class 1.
Is the price difference justified?
For furniture that has to stand outdoors for decades with minimal maintenance, yes. If you are willing to put in some work now and then, acacia or meranti is a fully fledged choice for less money.
Does teak really need no maintenance?
Not structurally: it does not rot easily and stays sound. But without treatment it turns silver-grey. If you want to keep the golden brown, oil it once or twice a year — purely for the colour.
What is the best alternative to teak?
For garden furniture, usually acacia: sturdy, attractive grain and able to stand up to the outdoors, with a clearly lower durability class and less natural oil. With regular maintenance it lasts for years.
What about Douglas fir?
Douglas fir is a softwood, not a hardwood — but it is the sturdiest softwood, with durability class 3. The comparison is in Douglas fir or hardwood.
Convinced?
If you know which way you want to go, the furniture is ready. If you are still in doubt, we have more comparisons.
Have a question about your project? Just ask — we're happy to help.
Photos via Wikimedia Commons: Tectona grandis — cultivar413, CC BY 2.0 · Tectona grandis, Nilambur (India) — Ganesh Mohan T, CC BY-SA 4.0