Search for wrought iron driveway gates in Brisbane and you will get aluminium ones in the same results, often in the same style, often looking near enough the same in a photograph. The honest difference is not really about looks. It is about weight, and about what weight does to every other part of the job: the footings, the posts, the hinges, the motor, and the amount of attention the gate needs once the installer has driven away. This is a comparison of how each one behaves on a Queensland driveway, including the cases where iron is genuinely the right answer.
The quick answer
Most gates sold as wrought iron today are mild steel, not true wrought iron. That matters, because mild steel rusts and true wrought iron largely does not.
Weight is the real divide. A steel gate can run three to four times the mass of the same gate in aluminium, and everything else has to be sized up to carry it.
Aluminium does not rust. It can corrode at a damaged edge in a coastal setting, but it will not bleed orange down a driveway the way steel does.
Iron still wins on heritage and character frontages, where the weight and the detail are the point and a lighter gate would look wrong.
What people actually mean by wrought iron
Worth clearing up first, because the word has drifted. True wrought iron is a low-carbon iron worked by hand, with a fibrous grain running through it, and it has not been produced commercially in Australia for generations. Almost every gate sold today as wrought iron is mild steel, either welded from bar and tube or cast into decorative sections, then painted or powder coated to look the part.
This is not a marketing trick so much as an inherited name, but it changes the decision. Real wrought iron is unusually resistant to corrosion because of its slag content. Mild steel is not. When you are comparing a steel gate against aluminium, you are comparing a material that rusts against one that does not, whatever the listing calls it.
A quick way to tell
Ask what the gate is made from rather than what style it is. If the answer is bar, tube, RHS or cast sections, it is steel. If a supplier cannot tell you, that is an answer too.
Weight, and everything it drags along with it
This is the part that catches people out, because it is invisible in a photograph. A driveway gate in aluminium and the same gate in steel are not the same job. The steel one is heavier by a wide margin, and that weight has to be carried by the posts, resisted by the footings, and moved by the motor, every single day.
| What carries the load | Aluminium gate | Steel or iron gate |
|---|---|---|
| Posts | Lighter section, often the same post family as the fence run | Heavier post, frequently steel, sometimes core filled |
| Footings | Standard driveway gate footing for the span | Deeper and wider, because the overturning force is greater |
| Hinges and bearings | Sized to the leaf, standard duty for most domestic spans | Heavy duty, and wear becomes a maintenance item |
| Motor | Smaller duty motor handles a typical domestic leaf | Higher duty motor, and the ramp up and slow down matter more |
| Long term sag | Low, because there is less mass hanging off the hinge line | The common failure, and it usually shows as a dropped latch edge |
None of this makes steel a bad choice. It makes steel a bigger job. If you are quoting two gates against each other and one quote is noticeably leaner, check whether the posts and footings in that quote were actually sized for the gate being hung on them. Our guide to footing depths for fences and gates covers what the span and the material should be driving.
Span matters as much as material. If you are still deciding between a gate that swings and one that slides, that choice changes the loading again, and sliding against swing driveway gates works through it for a domestic driveway.
Rust is the Queensland question
South East Queensland is humid for much of the year, storms arrive hard in summer, and a large part of the population lives within reach of salt air. Those three things together are what decide how a metal gate ages here.
Steel rusts when the coating is breached. On a driveway gate the coating gets breached in predictable places: the bottom rail where a mower or a wheelie bin catches it, the latch edge, the hinge knuckles, and any weld that was not prepared properly before painting. Once it starts, it works outward under the paint film, and the first sign is usually a rust stain running down the driveway rather than a mark on the gate itself.
Aluminium behaves differently. It forms its own oxide layer, and that layer is stable, so a scratch does not spread the way a scratch in a painted steel surface does. It is not immune to everything, and in a beachfront setting you will still see surface pitting on a damaged edge, but it will not stain the concrete. We go into what does and does not affect it in whether aluminium fences rust.
The comparison against steel fencing generally runs the same way, and aluminium against steel fencing covers the fence version of this question if you are doing the whole boundary.
What each one asks of you over ten years
Neither gate is maintenance free, but they ask for different things, and the difference compounds.
Aluminium. Wash it. A hose and a soft brush a couple of times a year keeps the powder coat clean, and coastal sites benefit from more often. Hardware still needs occasional attention, particularly the hinges and the latch alignment.
Steel. Wash it, and then inspect it. Any chip, scratch or weld bloom needs touching up before it takes hold, and a gate that has started to rust properly needs grinding back and recoating rather than painting over. Budget for a full recoat at some point in the gate’s life.
Both. Hinges, latches, stops and any automation need the same periodic check, and the heavier the leaf, the more that check matters.
The powder coat is doing most of the work on either material, and the quality of that coating varies more than people expect. What separates a good powder coat from a cheap one is worth a read before you compare two quotes that look similar on paper.
Where wrought iron is genuinely the better choice
We supply aluminium, so it is worth being straight about this: there are frontages where a steel or iron gate is the right call and an aluminium one would look wrong.
Character and heritage streets. On a Queenslander with an established iron palisade fence, or in a character overlay where the streetscape is assessed, matching the existing ironwork is usually the better outcome. Our notes on front fences on character homes cover what tends to be expected.
Genuinely ornate detail. Scrollwork, cast finials and hand formed detail belong in steel. Aluminium can be made decorative, but the heavy traditional look comes from mass, and mass is the thing aluminium does not have.
Matching existing ironwork. If the fence either side is iron, a new aluminium gate between it will read as the odd one out, whatever colour it is coated.
The honest middle ground
Plenty of Brisbane homes end up with an iron look at the front and aluminium down the sides and rear, where nobody sees it and the weight buys you nothing. That is a reasonable answer, not a compromise.
Automation: the part that punishes a heavy gate
If the gate is going to be automated, and most driveway gates now are, the material choice stops being cosmetic. A motor is rated for a mass and a leaf width, and a steel gate eats into both numbers at once.
The practical consequences are a larger motor, more current draw on every cycle, more strain on the gearbox at the start and end of travel, and a shorter life if the motor was specified at the edge of its rating rather than comfortably inside it. On a solar setup this gets sharper again, because every cycle is drawing from a battery that has to be recharged by a panel. Solar gate openers in Queensland goes into the sizing.
Our guide to automatic gate motors covers the duty ratings and what to ask about, and what an automatic driveway gate involves sets out the whole system rather than just the leaf.
Before you decide, measure
Whichever material you land on, the measurement is the same and it is the thing most often got wrong. The opening width is not the gate width, the fall across the driveway changes what will swing, and the space behind the opening decides whether a slider is even possible.
Work through how to measure for a driveway gate before you ask anyone to quote. A quote against a correct measurement is comparable. A quote against a guess is not, and that is where two very different numbers usually come from.
If you want to see the aluminium side of the range while you are deciding, our aluminium gates in Brisbane page covers the profiles we make, and gate hardware covers the parts that decide how long any of it keeps working.
Frequently asked questions
Is a wrought iron driveway gate stronger than aluminium?
In raw material terms steel is stronger, yes. In practice a domestic driveway gate is not limited by material strength, it is limited by how well the posts, footings and hinges were sized. A well built aluminium gate on correct footings will outlast a heavy steel gate hung on undersized posts.
Will an aluminium gate look cheap next to iron?
At a distance, in the same colour and profile, most people cannot tell. Up close the difference shows in the detail: traditional ornate scrollwork belongs in steel. A modern flat blade or slat profile looks the same in either.
How long before a steel driveway gate starts to rust in Brisbane?
It depends almost entirely on the coating and on damage. A well prepared, well coated gate that never gets chipped can go many years. A gate that catches a mower on the bottom rail in its first summer can show staining inside a year. The bottom rail and the latch edge are where to look.
Can I automate a heavy iron gate?
Yes, with a motor specified for the mass and the leaf width rather than one chosen on price. The mistake is fitting a motor rated at the edge of the gate’s weight, which works on day one and fails early.
Do you supply steel or wrought iron gates?
No. We make aluminium fencing and gates, supply only or installed, across Brisbane and South East Queensland. If your frontage genuinely calls for ironwork we would rather say so than sell you the wrong thing.
General guidance only. Gate sizing, footing depth and motor selection depend on your driveway, slope, exposure and the gate you choose. Have the specific job assessed before ordering.
Working out what your fence line needs? Tell us the run and the height and we will quote it, supply-only or installed.
- Brisbane-based supplier
- Aluminium fencing & gates
- Supply or installed