Is Aluminium Wiring in Older Homes Actually Dangerous?

Byron Knight, Licensed Electrical Contractor

QLD Lic. 1511406 · 20+ years’ experience · Gold Coast & SEQ · Updated August 2026

Search this question and you’ll find a lot of confident alarm, most of it describing a country you don’t live in.

The aluminium wiring scare is a real story with a real body count, and it happened in American houses built during a copper price spike in the late 1960s and early 1970s, where aluminium was run through branch circuits and landed on terminals never designed for it. That’s a specific alloy, in a specific era, against specific fittings. It gets repeated on Australian sites as though the same houses were built here.

So here’s the honest version: what Queensland’s own regulators actually warn about in older homes, what the physics genuinely does, and what’s worth doing if you think you’ve got it.

What Queensland actually warns about in older homes

This is the part that reframes the question, and it took me a while to appreciate it.

The Queensland Building and Construction Commission publishes a list of electrical fittings and wiring to watch out for in older properties. It names VIR and TRS rubber-insulated cable in installations wired prior to 1960, which can deteriorate to the point of exposing live conductors, and Bakelite fittings that go brittle and break in your hand.

Aluminium is not on that list. It isn’t the subject of a Queensland safety alert either, and I could find no Australian regulator publishing prevalence data on residential aluminium wiring: how many homes have it, which eras used it, or how often it fails here.

Meanwhile the hazards Queensland does name are the ones an older-home owner should actually be asking about, and they have nothing to do with which metal the conductor is made of. A pre-purchase electrical inspection is where those get found, not a web search.

The physics, which is genuinely real

None of the above means aluminium behaves like copper. It doesn’t, and every difference shows up in the same place: the connection.

Aluminium expands and contracts more than copper as it heats and cools, and it creeps, meaning it slowly deforms under sustained pressure. A terminal screwed down hard on aluminium can be looser a year later without anyone touching it. Aluminium also forms an oxide layer the moment it meets air, and unlike copper’s oxide, that layer resists current rather than carrying it.

Then the loop starts, and it’s the same one behind most electrical fires: a slightly loose joint adds resistance, resistance makes heat, heat accelerates oxidation and loosening, and the joint gets worse rather than settling. It is slow. It can run for years. It ends at a termination that is hot enough to smell, which is what a burning smell at a power point usually turns out to be.

There’s a Gold Coast wrinkle too. Where aluminium and copper meet in the presence of moisture and salt, you get galvanic corrosion, the two metals reacting with each other rather than simply ageing. That’s the same chemistry that makes switchboards corrode faster near the coast, and it’s why a mixed-metal joint in a beachside board at Miami or Palm Beach deserves more attention than the same joint inland.

All of which points one direction: the cable running through your wall is not the problem. The ends of it are.

Which means the question is where yours is, not whether aluminium is bad

Two installations can both contain aluminium and present completely different amounts of risk, depending on how many terminations there are, what hardware they land on, and where those connections sit.

That is not something an article can answer about your house, and it is not something a web search can either. It needs someone with the cover off, safely, looking at the actual connections. Which is also why the checking is not a job to do yourself: opening a switchboard is electrical work, and the Electrical Safety Office lists that class of work as requiring a licensed electrician. Colour-checking a conductor is not worth a shock.

The part most owners forget: some of it belongs to you

On older properties, particularly ones with a private pole or an overhead run to a shed, a length of that cable is yours rather than the network’s, and it comes with obligations most people have never heard of.

Energex is direct about it: if you’re the property owner, keeping private property poles safe and well maintained is your responsibility, and under Queensland law the landowner must regularly inspect and maintain any privately owned electricity infrastructure. Their recommendation is a safety inspection every five years by a licensed electrical contractor, an accredited pole inspector, or an RPEQ engineer. They also warn plainly against attempting repairs yourself, since electrical work without a licence is an offence.

If your aluminium is in a private overhead run, that five-yearly rhythm is the answer to “how often should I worry about this”, and it’s a schedule rather than an anxiety.

What actually needs to happen if you have it

1. Get it identified properly. Aluminium is dull grey against copper’s pink. That’s a two-minute answer for someone with the cover off safely, and a guess for anyone else.
2. Have the terminations inspected, not the cable. Condition, tightness, correct hardware, signs of heat. This is where the entire risk lives.
3. Check for mixed metal joints. Aluminium landing directly on copper or on fittings not rated for it is the specific combination worth finding, especially near the coast.
4. Re-terminate with the right hardware where needed. Terminals rated for aluminium, correct preparation, correct torque. Not a retighten and hope.
5. Put it on a schedule. Aluminium terminations benefit from being revisited rather than tightened once and forgotten, because creep is a slow and continuing process.

Notice what isn’t on that list. A full rewire is occasionally the right answer, usually because the installation has other problems of the kind QBCC describes, but it is not the automatic consequence of finding aluminium. If someone quotes a rewire off the back of a glance at your switchboard, the questions worth asking are in what a rewire actually involves.

On older boards a thermal imaging scan is the most useful tool here, because a joint that’s running hot shows up as heat under load long before it shows up as a smell. It turns an invisible slow failure into something you can look at.

On that last one the Electrical Safety Office’s advice is worth repeating exactly: if you touch something that gives you an electric shock or a tingle, the next thing you touch should be your phone. Intermittent symptoms without an obvious cause are a fault finding job.

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