What kind of electrician handles knob-and-tube or old wiring?
Older wiring systems such as knob-and-tube, cloth-insulated wiring, aluminum wiring, or ungrounded circuits usually require a licensed electrician with older-home rewiring and code-upgrade experience. These projects may also involve grounding, panel upgrades, permits, and inspection requirements.
Why older wiring needs a specialist
Older electrical systems were designed for the loads of their era — not modern HVAC, appliances, EV charging, or home offices. Knob-and-tube wiring lacks a ground conductor and is incompatible with modern three-prong devices. Cloth-insulated wire becomes brittle with age, increasing fire risk. Aluminum wiring from the 1960s–70s requires specific connection methods to prevent overheating. In addition to the safety and code concerns, many insurance carriers will not insure or renew a policy on a home with active knob-and-tube wiring. A licensed electrician experienced with older homes can assess the system, advise on what must be replaced versus what can be safely remediated, and manage the permit and inspection process.
When a panel upgrade may also be needed
Rewiring and panel upgrades often go together. Homes with older wiring systems frequently also have 60-amp or 100-amp service panels that predate modern electrical loads. If your home needs rewiring and the panel is undersized or outdated, your electrician may recommend addressing both in the same project. Coordinating the two jobs with one contractor is usually more efficient and cost-effective than treating them separately.
What to ask when hiring
When evaluating electricians for older-home wiring projects, ask: Do you have experience specifically with knob-and-tube or [your wiring type] remediation? Will you pull a permit and schedule an inspection? Can you provide a written scope that distinguishes what will be replaced versus what will be remediated? Will you provide documentation for my insurance company? The right electrician will answer all of these confidently.
Published · ElectriScout Editorial