Quick Overview
Aluminum branch circuit wiring was widely used in Canadian homes from the mid-1960s to late 1970s as a lower-cost alternative to copper. It expands and contracts more than copper, which can cause loose connections that overheat over time.
How to Identify
- • Silver-colored wires (copper is orange/brown)
- • "AL" or "Aluminum" stamped on cable jacket
- • Visible at electrical panel or junction boxes
- • Home built between 1965-1978
- • Warm or discolored outlet/switch cover plates
Major Risks
- • Fire risk from oxidation at connections
- • Overheating at outlets and switches
- • Incompatible with standard copper-rated devices
- • Potential insurance surcharges or coverage conditions
- • May affect resale value
Understanding Costs
Remediation cost depends on the number of connection points, the method used (full rewiring, COPALUM, or AlumiConn), and local labour rates. Ask for itemized written quotes from licensed electrical contractors comparing these options before deciding.
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Professional Recommendations
Immediate Actions:
- • Have all connections inspected by licensed electrician
- • Note any warm or discolored cover plates, but do not disturb wiring yourself
- • Do not use standard copper-only devices
- • Notify your insurance provider
Long-term Solutions:
- • Install COPALUM or AlumiConn connectors at all points
- • Replace all devices with CO/ALR-rated versions
- • Consider full copper rewiring for a more permanent fix
- • Obtain an inspection certificate from your provincial electrical safety authority after remediation
Common questions
Frequently Asked Questions About Old Canadian Houses
Common questions from buyers and owners of older Canadian homes, answered with era context and pointers to the professionals who can confirm anything on a specific property.
Have a question not answered here? Browse our full inspection guide or explore all resources.