A garden bench has to put up with everything a British year can throw at it: rain driven sideways, weeks of drizzle, a fortnight of proper sun, then frost. The material the frame is made from decides how well it copes, how often it will ask for your attention, and how it looks in five years' time.
Almost every bench sold in the UK is made from one of four things: teak, oak, acacia or metal. They behave quite differently. Here's how they compare on durability, maintenance, cost and weather performance, so you can pick the one that suits your garden and your habits.
Teak: the benchmark for wooden benches
Teak is a dense hardwood with natural oils and silica in the grain, which is what makes it resist rot and insects without much help from anyone. Left alone, it fades to a soft silver-grey within a season or two and stays there, structurally sound for many years. Fine surface cracks, known as checking, are normal and not a sign of failure.
If you want to keep the warm honey colour, oil it once or twice a year, ideally in spring. If you prefer the grey, simply clean it with warm soapy water and a soft brush. What teak does not like is being ignored for years and then scrubbed hard or pressure-washed, which raises the grain and leaves it rough.
Teak is the most expensive of the four by a wide margin. Look for the botanical name Tectona grandis if you are paying a premium, as the word is sometimes used loosely.
Oak: heavy, handsome and unmistakably British
Oak is hard, heavy and full of tannins, the natural compounds that help it resist decay and insects. Untreated, it weathers to the same silver-grey as teak and can last for decades, provided the joints are sound and the feet are not sitting in water.
Two quirks are worth knowing. Tannins leach out in rain and can stain pale paving, especially in the first year or two, so oak sits more happily over darker stone or gravel. And oak moves as it takes on and loses moisture, which means untreated timber may develop small splits along the grain. These are usually cosmetic, but they are the reason oak benefits from a finish.
Finishing and looking after oak
A penetrating oil suits oak best: apply it in dry weather, in thin coats, and wipe off the excess rather than leaving it tacky. A clear wood preserver works too. Re-coat annually if you want the golden colour; if you like the grey, leave it alone entirely. Keep an eye on any bolts or dowels, as movement can loosen them over a season.
Acacia: the value option among hardwoods
Acacia is why you can buy a solid hardwood bench for the price of a decent plastic one. It grows quickly, is widely grown on managed plantations, and is genuinely hard. Left untreated, though, it is less forgiving than teak or oak, and cheaper pieces often arrive with small knots, short grain and thin sections.
Most acacia benches are sold already oiled, and that finish is doing real work: it slows water uptake and reduces the movement that causes hairline cracks. Plan on re-oiling once a year, and again after a wet winter if the wood looks dry and pale. Keep the fixings tight, since acacia shrinks slightly as it dries, and lift the bench off wet grass instead of leaving it to sit in the damp.
If you want a bench that looks after itself, this is not it. If you are happy to spend an hour a year with a brush and a tin of oil, it is excellent value.
Metal: low fuss, but mind the finish
Metal benches fall into two groups. Cast aluminium is light, will not rust, and holds a powder-coated finish well; you can leave it outside all year and do almost nothing to it. Cast iron and steel are heavier and often more traditional-looking, but every scratch in the coating is a place for rust to start. Once rust creeps under a powder coat it lifts the finish in flakes, and repainting means stripping back to bare metal.
Whichever you choose, check the details before buying: welded joints should be smooth and continuous, feet should have rubber or plastic glides to lift them off wet paving, and the seat should drain so water does not pool. Touch up chips promptly with a suitable metal primer and topcoat. It takes five minutes and saves a season of decay.
One drawback in a British garden: metal is cold to sit on from October to April and can become uncomfortably hot in a sunny spell. Cushions solve both problems, but then you have cushions to store.
Comparing the four at a glance
- Teak — longest lifespan, least maintenance, highest price. Weathers to grey, or oils up to gold.
- Oak — very durable and very heavy; wants an annual finish to hold its colour; tannins can stain paving.
- Acacia — best value and easy to move; annual oiling essential to avoid cracking and grey, grainy wear.
- Metal — aluminium is near zero maintenance; steel and iron need rust checks and touch-ups; cold without cushions.
What British weather actually does to a bench
Alternating wet and dry is harder on timber than steady rain, and that is the pattern most UK gardens get. Water sits in the joints, the wood swells, then dries and shrinks, and the cycle repeats. Add frost in the joints, algae on shaded surfaces and UV that bleaches any finish, and you have a fair summary of what a bench endures.
A few habits make more difference than any product:
- Sit the bench on paving, gravel or decking rather than grass or bare soil.
- Keep the feet clear of standing water; rubber feet or small pavers help.
- Clean with warm soapy water and a soft brush each spring, and skip the pressure washer.
- Tighten bolts and screws, and check for rust, splits and loose joints at the same time.
- In winter, move the bench into a shed or garage, or cover it with a breathable, tied-down cover. Never wrap a wet bench in plastic — trapped moisture does more damage than rain.
Choosing the right bench for your garden
Start by being honest about how much maintenance you will actually do. If the answer is none, buy cast aluminium or pay for teak and let it weather to grey. If a spring tidy-up appeals, oak or acacia will reward you with looks metal cannot match, and the annual oiling is a pleasant hour with the radio on.
Then think about position. A bench in full sun feels very different in metal than in timber, and one under trees will collect algae and leaf litter whatever it is made of. Weight matters too: oak needs two people to shift, and you will want to move the bench when you mow or repaint a fence.
Finally, buy the best version of whichever material you pick. A well-made acacia bench will outlast a cheap teak one, and a solid steel frame with proper welds will see off far more winters than a thin, hollow aluminium lookalike. Material matters, but so does how it is put together.
Photo: Kapa65 / Pixabay
