How do I know if my home has knob-and-tube wiring?

Knob-and-tube wiring uses individual ceramic knobs mounted on wood framing with cloth-insulated wires running between them. You’ll typically find it in attics, basements, and behind walls of pre-1950s homes. A licensed electrician can confirm during an inspection.

Is aluminum wiring dangerous?

Aluminum wiring itself isn’t inherently dangerous, but the connections where aluminum meets copper (which is most connection points) can loosen and overheat over time. This is a known fire risk. If your home has aluminum wiring, have it inspected and consider remediation.

How much does a full rewire cost?

A full rewire of a typical New Canaan home ranges from $8,000 to $20,000+ depending on home size, accessibility, and scope. New Canaan Electric provides a free, detailed estimate after an on-site inspection.

Do I need to rewire my entire house?

Not always. Some older wiring can be safely maintained with targeted repairs and GFCI/AFCI protection. A professional inspection will determine whether a full rewire is necessary or if partial upgrades will address safety concerns.

Safety

Is Your Old Home’s Wiring Safe? What New Canaan Homeowners Should Know

April 10, 2025 5 min read

New Canaan\u2019s historic homes are one of the town\u2019s greatest draws \u2014 charming architecture, mature trees, and character you just can\u2019t find in new construction. But behind those beautiful walls, aging electrical wiring can be a hidden hazard that puts your family and property at risk.

Here\u2019s what every older-home owner should know about wiring safety.

Knob-and-tube wiring

Common in homes built before 1950, knob-and-tube (K&T) wiring uses individual ceramic knobs to route wires through framing. It was fine for its era, but it wasn\u2019t designed for modern loads. Over time, insulation around the wires degrades, connections loosen, and the lack of a ground wire becomes a serious limitation. K&T wiring is not inherently dangerous, but it does need professional evaluation \u2014 especially if you\u2019re adding circuits or insulation.

Aluminum wiring (1960s\u20131970s)

Aluminum was widely used as a copper substitute during the 1960s and 70s. The problem: aluminum expands and contracts more than copper, causing connections to loosen over time. Loose connections overheat, and that\u2019s a known fire risk. If your home has aluminum wiring, it should be inspected by a licensed electrician who can recommend remediation options like AlumiConn connectors or full replacement.

Cloth-insulated wiring

Before plastic sheathing became standard, wiring was wrapped in cloth insulation that becomes brittle with age. Brittle insulation cracks, exposing live wires. If you see cloth-covered wiring in your basement or attic, have it evaluated \u2014 especially if you\u2019re planning any renovations.

Warning signs in older homes

Watch for: flickering or dimming lights, warm or discolored outlets and switch plates, burning smells, buzzing sounds from outlets, two-prong outlets with no ground, and circuit breakers that trip frequently. Any of these could indicate aging wiring that needs attention.

What you can do now

The best first step is a whole-home electrical safety inspection. A licensed electrician will assess your wiring type, condition, and capacity, then give you a clear picture of what\u2019s safe and what needs upgrading. You don\u2019t always need a full rewire \u2014 targeted repairs, GFCI/AFCI protection, and grounded outlet upgrades can make a big difference.

Get a safety inspection

New Canaan Electric specializes in older-home electrical safety. We\u2019ll inspect your wiring, identify hazards, and give you a prioritized plan \u2014 no pressure, no surprises. Serving New Canaan and Fairfield County with upfront, honest pricing.

Call (203) 984-8722