Aluminum Wiring Repair and Remediation

Which houses have it

Aluminum was used for branch circuit wiring in Canadian homes for roughly a decade, from the mid 1960s to the mid 1970s, when copper was expensive. Then the industry moved back to copper.

So the question is mostly about the build date. If your house went up between about 1965 and 1976, it is worth checking. Belleville and the surrounding towns have a good deal of housing from exactly that window.

How to check without opening anything: look at the cable sheathing where it enters the panel, or where a cable is visible in an unfinished basement. Aluminum branch cable is usually marked ALUMINUM or AL along the jacket. The conductors themselves are silver rather than copper-coloured.

Do not go pulling outlets apart to look. That is the exact connection that fails, and disturbing it without knowing what you are doing makes it worse.

Why the connections fail

Aluminum expands and contracts more than copper as it heats and cools. Every time a circuit carries a load, the conductor moves fractionally under the screw holding it.

Over decades, that works the connection loose. A loose connection has resistance. Resistance makes heat. Heat makes the connection looser. It is a slow feedback loop that ends at a device box, which is why the smell and the warm faceplate are the symptoms people notice.

Aluminum also oxidises, and unlike copper oxide, aluminum oxide does not conduct. And when aluminum is pressed against the wrong metal in the presence of moisture, the two corrode each other — which is why an aluminum conductor under an ordinary brass screw on a modern receptacle is a genuinely bad idea rather than a technicality.

What the work involves

Pigtailing. At every device, we cut back the aluminum conductor to clean metal, join it to a short copper tail using an approved connector rated for aluminum-to-copper, and land the copper tail on the device. The device then sees copper, which is what it was designed for.

Replacing devices. Any receptacle or switch that is not rated for aluminum gets swapped for one that is, or gets a copper pigtail so the rating stops mattering.

The panel. Connections at the breakers get remade with the correct compound and torqued to spec. This is the single highest-current connection in the house and it gets checked properly rather than glanced at.

Junction boxes and fixtures. The connections nobody sees. Ceiling fixtures are a common failure point because heat from the lamp adds to the heat from the connection.

Documentation. ESA notification, inspection, and a Certificate of Inspection listing what was done. That is the paper your insurer wants.

We work room by room. Power is off in the room being worked on and on everywhere else in the house.

What it costs

$18 to $32 per device, and a device means one outlet, one switch, or one light fixture connection.

A typical three-bedroom home has somewhere between 40 and 80 of them. So most whole-house remediations land in the low four figures rather than the five figures a rewire would cost. That gap is the reason this page exists — a lot of people are quoted a full rewire for a problem that does not need one.

What moves the number:

• Device count. Straightforward. More outlets, more cost.
• Access. A device behind a bookcase or inside a closet takes longer than one on an open wall.
• What we find. Boxes that are already overfilled, connections that have been overheating for years, or previous repairs made with the wrong connectors all add time.
• Whether the panel needs work too. If the service is also 60 or 100 amp and due for replacement, doing both at once is cheaper than doing them separately.

We count the devices during the site visit, so the quote you get is a number and not an estimate per point.