The Truth About Aluminum Wiring In Older Homes

If you live in a home built between the 1960s and 1970s, there’s a chance your electrical system uses aluminum wiring. At the time, aluminum was seen as a cheaper alternative to copper — but decades later, it’s become known for potential safety hazards that every homeowner should understand. Knowing the truth about aluminum wiring can help you decide whether your home needs repairs, upgrades, or a full rewiring.

Aluminum conducts electricity well, but it behaves differently from copper. Over time, aluminum wiring **expands and contracts** more with temperature changes, which can cause loose connections inside outlets and switches. When wires loosen, they can spark, overheat, and lead to electrical fires. That’s why many insurance companies and electricians recommend replacing or upgrading aluminum wiring whenever possible.

One common warning sign is **flickering lights, warm outlets, or the smell of burning plastic** near electrical devices. These symptoms often indicate poor connections or overheating caused by aluminum wire. However, not all aluminum-wired homes are unsafe — the level of risk depends on how well the system was installed and maintained. Modern repair methods can make these systems safer without requiring a complete replacement.

A licensed electrician can perform an inspection to determine whether your home has aluminum wiring and how it’s performing. If replacement isn’t immediately necessary, they may recommend using **special connectors called COPALUM or AlumiConn**, which safely join aluminum wires to copper ones. This creates a stable connection that resists corrosion and reduces heat buildup.

Upgrading your outlets and switches to devices marked “CO/ALR” (Copper/Aluminum Revised) is another safety measure. These devices are specifically designed to handle aluminum conductors and maintain tight, safe connections.

In some cases, especially if you plan to remodel or add new circuits, it’s worth investing in a **full rewiring project** with copper wiring. Though it can be a bigger project, it greatly improves safety, reliability, and resale value.

If your home has aluminum wiring, don’t panic — but don’t ignore it either. A professional inspection can tell you exactly what condition it’s in and what steps to take next. With proper upgrades and maintenance, you can keep your home safe while avoiding costly electrical problems in the future.