Can Aluminum Wiring Be Repaired?

Between 1965 and 1975, a copper shortage led builders to use solid aluminum for branch circuits (outlets, switches, lights). Aluminum expands and contracts more than copper under load, oxidizes into a resistive coating, and loosens at connection points. CPSC data shows those homes are 55 times more likely to have a connection point at fire-hazard conditions than copper-wired homes.

• COPALUM crimp — a special crimp connector applied with a tool from Tyco Electronics that pigtails a short copper wire onto each aluminum end. CPSC-recommended, effectively permanent, requires a certified installer.
• AlumiConn purple wire nut — a set-screw-based connector approved by CPSC as a code-compliant alternative. Faster and cheaper to install.

If the house is being remodeled, opened up, or the wiring is also degraded (cracked insulation, prior handyman splices, mixed with knob-and-tube), a whole-home rewire in copper is often close in cost to pigtailing hundreds of connections — and it's a permanent fix rather than a mitigation.

AlumiConn pigtailing: $10–$25 per connection, or $2,500–$8,000 for a whole home depending on outlet count. COPALUM: 30–50% more. Full rewire: $12,000–$25,000 for a typical Orange County single-story.

Tract homes built 1968–1974 in Fullerton, Anaheim, Placentia, and Garden Grove commonly have aluminum branch. Insurance carriers increasingly refuse to renew policies on unremediated aluminum-wired homes — we've written the letter to the carrier confirming AlumiConn remediation more times than we can count.