Teak vs aluminum outdoor furniture

Teak heartwood and cast aluminum are both twenty-year materials outdoors, so the choice is not about which lasts longer. Teak needs no coating and can be repaired, but it changes color and asks for cleaning. Aluminum needs nothing annual and cannot rust, but it gets hot in sun and its finish is a consumable you cannot renew properly.

The short answer

Buy teak if you want furniture you can repair and you are at peace with it going silver. Buy cast aluminum if you want to do nothing to it and you have shade. Those two sentences cover most of this decision, and everything below is the detail behind them.

The honest caveat on both sides is grade. "Teak" spans mature heartwood and plantation timber with substantial sapwood, and the USDA Forest Products Laboratory is clear that decay resistance lives in heartwood. "Aluminum" spans thick cast sections and thin tube, with a powder coat whose grade almost nobody publishes. The grade question matters more than the material question on both sides.

Side by side

The annual bill

This is where the two materials actually separate, and it is worth being concrete because the maintenance load is where most buyers end up unhappy.

Teak asks for an afternoon. Not for survival — untreated teak heartwood is structurally fine left alone — but for appearance. If you want honey rather than silver, that is a clean and an oil every year, and the chore scales with the number of pieces. Clearing debris out of joints is the part that genuinely extends life, and it takes minutes.

Aluminum asks for a tin of touch-up paint. There is no annual job. There is an occasional one: a coating chip on an aluminum frame is cosmetic rather than structural, but left alone it becomes an oxidation stain, and on a coastal site it starts pitting. Our salt-air page explains why that timeline shortens dramatically near the water.

Heat and wind

Two practical properties that comparison tables usually skip, and both favor wood.

Heat. Aluminum conducts, so a cast aluminum seat in direct afternoon sun is genuinely unpleasant to sit on, and the arms are worse. The fix is shade rather than a different finish color, which makes an umbrella part of the purchase if your patio faces the sun. Teak does not do this.

Wind. Mass is what keeps furniture on a deck. Teak is dense and heavy; cast aluminum is heavy; thin tube aluminum is not, and that is the version that goes over a railing. If you are comparing a teak chair against a lightweight aluminum one, you are not comparing like with like — see the metal comparison for how the constructions differ.

Repairability, which decides the long run

Over twenty years, repairability matters more than any spec on either product page, and this is the one place teak wins outright.

• Teak can be returned to new. A scorch, a scratch, a stain, a gray patina — all of it sands out, and a two-part chemical cleaner does most of the work with far less material removal than sanding. See our restoration guide.
• Aluminum cannot be refinished at home. A powder coat is applied electrostatically and cured in an oven; you can touch up a chip, and you cannot re-coat a frame in a garden. A dull, chalked frame stays dull.
• Both have replaceable hardware, which matters more than people expect. Bolted construction on either material means you can swap fasteners before they become the reason the furniture is scrapped.

How to choose

• Full-sun patio with no shade plan: teak. Aluminum will be too hot to use at the time of day you want to use it.
• You will not do any annual maintenance: aluminum, and accept that it will dull. Or skip both and read the poly lumber page.
• Coastal site: either, with reservations. Teak is unaffected by salt; aluminum resists it far better than steel. Both need their fasteners watched.
• You want it to look new in year fifteen: teak, because it is the only one of the two you can refinish.
• Exposed, windy deck: teak or cast aluminum. Not tube.