Short Answer
Aluminum wiring was used in homes built between 1965 and 1973. It is not inherently dangerous, but it requires proper installation and maintenance. Aluminum wiring connections can loosen over time, creating a fire hazard. If the home has aluminum wiring, have it inspected by a licensed electrician. Repairs may involve installing copper pigtails at connection points using special connectors. Aluminum wiring can affect your insurance rates, and some companies may require proof of safe condition.
Aluminum wiring was used as a lower-cost alternative to copper during the mid-1960s to early 1970s. It is estimated that two million homes in the United States have aluminum wiring. Aluminum wiring is safe when properly installed, but it has different properties than copper. Aluminum expands and contracts more with temperature changes, which can cause connections to loosen over time. Aluminum also oxidizes when exposed to air, and the oxide layer is not conductive, which can cause overheating at connection points. The fire risk comes from loose connections and overheating, not from the wire itself. If you are buying a home with aluminum wiring, have a licensed electrician inspect the wiring and connections. The preferred repair method is to install copper pigtails at every connection point using COPALUM connectors or AlumiConn connectors. These are specialized connectors designed for aluminum-to-copper connections. Homeowners insurance companies may have specific requirements for homes with aluminum wiring. Some may require proof that the wiring has been properly maintained or repaired.
Bob's Advice
Redfin Senior Agent · AI Certified Agent
Aluminum wiring is not a dealbreaker, but it is something you need to address. I have helped buyers navigate aluminum wiring inspections and repairs. The cost of having an electrician inspect and repair aluminum wiring connections is typically $300 to $500 for the inspection and $15 to $25 per connection for repairs. For a typical home, the total cost is $2,000 to $5,000. If you are looking at a home built between 1965 and 1973, let us check the wiring and factor any needed repairs into your offer.
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