Aluminum Wiring in 1960s-70s Killeen and Copperas Cove Homes

From 1965 to 1973, copper prices drove builders to wire entire homes with solid aluminum. Many of those homes are still in service across the Fort Cavazos corridor — and the wiring needs attention.

If you're buying an older home in Killeen, Copperas Cove, Harker Heights, or anywhere else in the Fort Cavazos housing corridor, there's a specific electrical issue that comes up in inspections often enough to warrant its own conversation: aluminum branch-circuit wiring.

This isn't the same as the aluminum service entrance cable that's standard in nearly every modern home. We're talking about the smaller-gauge wiring inside the walls — the wires that feed your outlets, lights, and switches — being aluminum instead of copper. And from roughly 1965 to 1973, a meaningful percentage of homes built across central Texas were wired this way.

How we got here

Copper prices spiked dramatically in the mid-1960s. To control construction costs, builders and electrical manufacturers turned to aluminum, which was cheaper and abundantly available. Solid aluminum branch-circuit wiring was code-compliant at the time, and it was used in millions of homes nationally.

The problem wasn't the wire itself. The problem was how it terminated.

Aluminum has different properties from copper. It oxidizes more readily, it expands and contracts more with temperature changes, and it's softer — meaning it can deform under the pressure of a screw terminal over time. Combine these properties, and you get a slow process called creep: the connection that was tight on installation day gradually loosens, oxidizes, and develops resistance.

Resistance produces heat. Heat produces more oxidation. The connection gets worse. Over decades, the worst of these connections can reach temperatures that ignite surrounding materials — wood framing, paper-faced drywall, the back of a plastic outlet.

By 1973, the issues were well-documented enough that the industry largely moved back to copper for branch circuits. But every home built before that — and there are thousands of them across the Fort Cavazos area — still has the original wiring.

How to identify aluminum wiring

During a standard home inspection, we check for aluminum branch wiring in several ways:

• Panel inspection. Removing the dead-front cover from the electrical panel reveals the branch-circuit conductors. Aluminum is silver-gray; copper is reddish-brown. The color difference is unmistakable once you've seen both.
• Cable jacket markings. Non-metallic sheathed cable (Romex-style) has its conductor material printed on the jacket. "AL" or "ALUM" indicates aluminum.
• Age of home. Homes built 1965-1973 trigger automatic scrutiny.
• Sample device inspection. Removing a single outlet cover plate (after confirming power is off) lets us see the conductor at the device.

If aluminum branch wiring is present, the report flags it specifically and explains the recommended next steps.

What the failure actually looks like

The failure mode is gradual, and that's part of what makes it so dangerous. A homeowner won't see anything obvious until something is wrong.

Early warning signs:

• Outlets that feel warm to the touch when nothing is plugged in
• Flickering lights, especially on specific circuits
• Discoloration or scorching around outlet faceplates
• A faint plastic-burning smell that comes and goes
• Circuits that trip intermittently with no apparent cause

If any of these are present in a home with aluminum branch wiring, the conversation has moved from "you should remediate" to "you should remediate before you sleep there again."

The two accepted remediation methods

The Consumer Product Safety Commission and the electrical industry have identified two methods that effectively remediate aluminum branch wiring:

1. COPALUM crimp connections

A specialized crimping tool and copper pigtail are used to splice a short length of copper to the existing aluminum wire at every device. The copper pigtail is then connected to the outlet, switch, or fixture. This is the gold standard for aluminum remediation, but it requires a licensed electrician with COPALUM certification and the proprietary crimping tool — and those electricians can be hard to find.

2. AlumiConn connectors

A purpose-built lug-style connector (made by King Innovation) that accepts aluminum on one side and copper pigtail on the other, secured with set screws to specified torque. AlumiConn is widely available, code-recognized, and can be installed by any licensed electrician.

What is not acceptable: pigtailing with twist-on wire connectors (Wire Nuts) — even those marked for aluminum-to-copper use, like Ideal Twister Al/Cu. The industry has moved away from these because the long-term reliability data isn't there.

What this costs — and what it doesn't

Full whole-house remediation with AlumiConn connectors typically runs $1,500-$3,500 in central Texas, depending on the number of devices and the access conditions. That's a meaningful but manageable cost compared to a complete rewire (which can run $8,000-$15,000 for the average home).

Some buyers assume aluminum wiring means full rewire. It doesn't. Remediation at the connection points addresses the actual failure mode and is widely accepted by insurance carriers as adequate.

The insurance question

Here's where this gets practical. Many insurance carriers now decline to write new homeowner's policies on homes with unremediated aluminum branch wiring. Others charge significantly higher premiums or require remediation as a condition of binding the policy.

If you're buying an older home in Killeen, Copperas Cove, or anywhere in the Fort Cavazos corridor, run insurance quotes before you remove the option period. Discovering during the final week of closing that no carrier will write your home — or that the only quotes you can get are 3x what you budgeted — is the kind of surprise that derails deals.

The takeaway for buyers

Aluminum branch wiring isn't a reason to walk away from a home you otherwise love. It's a reason to:

1. Have it formally identified during your inspection with documentation;
2. Get a quote from a licensed electrician for AlumiConn remediation during the option period;
3. Factor that cost into your negotiation with the seller;
4. Run insurance quotes before lifting your option;
5. Make remediation a priority within the first few months of ownership.

For military buyers using a VA loan in the Fort Cavazos area, aluminum wiring is one of the issues we proactively check on every inspection of homes from this era. PCS timelines don't leave room for surprises at closing — and aluminum wiring is the kind of surprise that can blow up a deal in the last week if it isn't surfaced early.

If you're looking at a home and you're not sure how old it is or what the wiring looks like, ask. And if you can't get a clear answer, that's reason enough for a thorough inspection before you go any further.

Frequently asked questions