// Compare · Aluminum Wiring vs Copper Wiring · NYC
Aluminum Wiring vs Copper Wiring
If your home was built or rewired between 1965 and 1973, it may have aluminum branch wiring — a known fire-risk and insurance flag. Here's how it compares to copper and what your real options are.
Aluminum Wiring
Used in 1965–73 homes — needs attention
Copper Wiring
The modern standard — safe and reliable
Aluminum branch wiring isn't an emergency, but it needs professional remediation — and insurers increasingly require it.
Aluminum expands, contracts, and oxidizes more than copper, which loosens connections over time and creates heat at outlets and switches — the documented fire risk. You usually don't need to rip it all out: approved fixes like COPALUM crimps or AlumiConn connectors at every connection remediate the risk at a fraction of full-rewire cost. Copper is the gold standard for new work, but remediated aluminum can be safe. The wrong move is ignoring it — especially when your insurer asks.
Aluminum Wiring vs Copper Wiring: the full comparison
| Factor | Aluminum Wiring | Copper Wiring |
|---|---|---|
| Era used (branch wiring) | Primarily 1965–1973 homes | Before, during, and after — the constant standard |
| Connection behavior | Expands/oxidizes — connections loosen and heat over time | Stable connections |
| Fire risk | Elevated at connections if untreated | Baseline/low |
| Insurance | Often flagged; coverage may require remediation | No issue |
| Fix if present | Remediate connections (COPALUM/AlumiConn) or rewire | N/A |
| Remediation cost (NYC) | ~$30–$75 per connection/device remediated | Full rewire if chosen: from $2,500 |
| Conductivity | Lower — needs larger gauge for same load | Higher — smaller gauge carries more |
| Best path | Professional remediation, documented for insurer | Use for all new circuits and rewires |
How to choose
✅ Choose Aluminum Wiring if…
- Your home was built/wired 1965–1973
- Your insurer flagged it or is asking about it
- You see warning signs: warm outlets, flickering, burning smell
- You're buying or selling and it surfaced on inspection
- You want it remediated affordably without a full rewire
✅ Choose Copper Wiring if…
- You're rewiring or adding circuits — copper is standard
- You want the most reliable long-term connections
- You're future-proofing for higher loads
The NYC angle
Aluminum branch wiring shows up across NYC's 1960s–70s housing — parts of Queens (Forest Hills, Bayside, Rego Park), outer Brooklyn, and the Bronx especially. The most common way homeowners discover it is an insurance review at purchase or renewal.
Our approach is the honest one: we assess whether your aluminum needs full rewiring or whether connection-level remediation resolves it — usually the latter, at far lower cost — and we document the work so your insurer accepts it. Warning signs that warrant a call sooner rather than later are in our electrical safety guide.
Think you have aluminum wiring?
We'll inspect, confirm what you have, and tell you whether affordable remediation or a rewire is the right call — with documentation your insurer will accept.
Aluminum Wiring vs Copper Wiring: common questions
The risk is real but manageable. Aluminum's expansion and oxidation loosen connections over time, creating heat at outlets and switches — the fire-risk mechanism. Properly remediated with approved connectors, aluminum-wired homes can be safe. Untreated and ignored is the dangerous scenario.
Usually no. Approved remediation — COPALUM crimps or AlumiConn connectors at every device and connection — resolves the risk at a fraction of full-rewire cost. We assess condition and recommend remediation versus rewiring honestly, based on what your home actually needs.
Connection-level remediation typically runs $30–$75 per device/connection treated, so total cost scales with home size — often a few hundred to a couple thousand dollars. A full copper rewire (if condition requires) starts around $2,500 and rises with size. We quote after assessing.
Many insurers will, but increasingly require documented remediation first. Some surcharge or decline without it. We perform the remediation and provide documentation your insurer accepts. If you've gotten a notice from your carrier, that's the time to call.
Homes built 1965–1973 are the prime candidates. The wire may be stamped 'AL' or 'ALUMINUM' at the panel or outlets. Warning signs include warm cover plates, flickering lights, or a faint burning smell at outlets. We can confirm it during an inspection.
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