If you own an older home in a town like Montclair, Maplewood, Glen Ridge, or Summit, there is a real chance it still has some knob-and-tube wiring. And increasingly, homeowners are learning about it the hard way: from their insurance company. Here is what knob-and-tube means for your coverage in New Jersey, whether you truly have to replace it, and how to handle it without panic.
What knob-and-tube wiring is, and why insurers worry
Knob-and-tube was the standard wiring method in homes built before roughly the 1940s. It has no ground wire, its insulation gets brittle with age, and it was never designed for the electrical load of a modern household. Insurers flag it because aged or improperly modified knob-and-tube carries a higher fire risk, especially where it has been buried in insulation or spliced into over the decades. Learn more about knob-and-tube remediation.
Do you actually have to replace it?
There is no state law forcing you to remove knob-and-tube. The pressure almost always comes from insurance. Many New Jersey carriers will not write a new policy, or will not renew an existing one, on a home with active knob-and-tube. Some will insure it only after an electrician inspects it and confirms it is safe or has been remediated. So while it is not legally mandatory, it is often practically necessary to keep your home insured and to sell it.
The good news: it is often not all-or-nothing
A lot of the knob-and-tube in an old house is already abandoned and dead, left in the walls when previous work was done. The first step is not a demolition quote, it is an assessment. We trace what is still live and carrying load versus what is inactive, and we build a prioritized plan. Often the safety-critical circuits can be addressed first, with the rest phased over time.
How we handle it
- Inspect and map the wiring to separate live knob-and-tube from abandoned runs.
- Give you an honest, prioritized, written plan, not a scare tactic.
- Replace the active wiring with modern, grounded circuits, routed and concealed to respect an older home’s finishes.
- Pair it with a panel upgrade where the existing service cannot support the work.
- Pull the permit, pass inspection, and provide documentation your insurer can accept.
Serving older homes across northern New Jersey
We specialize in exactly these homes throughout Essex, Union, and Morris counties, including Montclair, Glen Ridge, Maplewood, Summit, and Madison. See all our service areas.
Frequently asked questions
Will my insurer really drop me for knob-and-tube wiring?
Many New Jersey insurers will not write or renew a policy on a home with active knob-and-tube, and others charge more or require an inspection. Policies vary, so check your specific carrier, but it is an increasingly common reason for non-renewal.
Do I have to replace all of it at once?
Not always. Some of it may already be abandoned and dead. We identify what is live versus inactive and can often prioritize the critical circuits first rather than doing everything in one project.
How much does knob-and-tube removal cost?
It depends on how much is active, how accessible it is, and whether walls are open. Because it varies widely, we assess the home first and give you a written, prioritized quote.
Can you give me documentation for my insurance company?
Yes. After remediation we provide permitted, inspected documentation that insurers typically accept to write or reinstate coverage.
Worried about your wiring or a renewal notice?
Call Voltus at (973) 382-9995 or request service online for an honest assessment of your home’s wiring.