Aluminum Wiring in Kingston Homes: Risks, Remediation, and Insurance Implications

During the mid-1960s to mid-1970s, copper prices skyrocketed, and builders turned to aluminum as a cheaper alternative for residential branch circuit wiring. Aluminum worked fine for large-gauge service entrance cables (and still does today), but the smaller-gauge wiring used for outlets, switches, and lights proved problematic over time. The issue isn't the aluminum itself — it's what happens at connection points.

Aluminum wiring poses fire risks primarily at connection points — outlets, switches, light fixtures, and the panel. When aluminum heats up (which it does more than copper), it expands. When it cools, it contracts. Over decades, this repeated expansion and contraction loosens connections. Loose connections create resistance, resistance creates heat, and heat can ignite surrounding materials. According to the Consumer Product Safety Commission, homes with aluminum wiring are 55 times more likely to have one or more connections reach fire-hazard conditions.

Look at the wiring entering your electrical panel or at an outlet. Aluminum wiring is silver-colored (copper is orange/brown). You may also see "AL" or "ALUMINUM" stamped on the wire jacket. If you're unsure, a qualified electrician can confirm in minutes. Many Kingston homes in neighborhoods like Kingscourt, Strathcona Park, and parts of the west end were built during the aluminum wiring era.

Many Ontario insurance companies will not insure homes with unremediated aluminum wiring, or they'll require an electrical inspection and remediation certificate before issuing a policy. If you already have insurance, your provider may require remediation upon renewal. This is a significant concern for Kingston homeowners buying or selling homes with aluminum wiring — it can affect both the sale price and the closing timeline.

There are three main approaches to addressing aluminum wiring: • COPALUM crimps: The gold standard. A special tool crimps a copper pigtail to each aluminum wire using a COPALUM connector. This is the only method recognized by the CPSC as a permanent repair. Cost: $3,000–$6,000 for a typical home. • AlumiConn connectors: A widely accepted alternative that uses set-screw connectors to join copper pigtails to aluminum wires. Approved by the ESA and accepted by most insurance companies. Cost: $2,500–$5,000. • Full rewire: Replacing all aluminum wiring with copper. This is the most thorough solution but also the most expensive and disruptive. Cost: $10,000–$25,000+ depending on home size.

For most Kingston homeowners, AlumiConn pigtailing is the best balance of safety, cost, and insurance compliance. It's ESA-approved, accepted by virtually all insurance companies, and can be completed in 1–2 days without opening walls. We've done hundreds of aluminum wiring remediations across Kingston and can provide a certificate of completion for your insurance company.