​Knob and Tube Wiring Replacement in Sarnia: What You Need to Know

Older homes in Sarnia, Ontario are full of charm, but many of them still have outdated knob and tube wiring that can pose serious risks. If you live in an older property, understanding the dangers of this outdated wiring system — and how to replace it — is crucial for your home’s safety and efficiency. At Electrician Sarnia, we've helped homeowners across the city safely upgrade their electrical systems, ensuring modern standards and peace of mind.


Why Knob and Tube Wiring is a Concern

Knob and tube wiring was commonly used in homes built before the 1950s. While it may have been safe when installed, it lacks the capacity to handle today's electrical demands. This wiring system has no ground wire, which increases the risk of shocks and electrical fires. Additionally, the protective insulation can become brittle over time, exposing wires and increasing the chance of dangerous shorts.


Real Stories from Sarnia Homeowners

Recently, we worked with a homeowner in the Mitton Village area who discovered knob and tube wiring during a kitchen renovation. They were shocked to learn that their home’s original wiring was still active and dangerously deteriorated. Our team quickly assessed the property, provided a detailed upgrade plan, and replaced the outdated wiring with a safe, modern electrical system. Not only did this increase their home’s safety, but it also allowed them to secure better home insurance rates.

Another homeowner in Heritage Park faced similar issues when trying to sell their home. Their sale was delayed because the buyer’s insurance provider refused coverage until the knob and tube wiring was replaced. We stepped in to complete the project efficiently, ensuring the sale went through without further delay.


Can You Replace Knob and Tube Wiring Yourself?

While some homeowners may be tempted to tackle electrical work on their own, replacing knob and tube wiring is not a DIY job. Ontario’s Electrical Safety Code has strict regulations to ensure electrical work is done safely and properly. Any wiring replacement must be performed by a licensed electrician and inspected by the Electrical Safety Authority (ESA). Attempting to replace knob and tube wiring yourself without proper knowledge can lead to serious hazards and may void your home insurance policy.


Is Knob and Tube Wiring Legal in Ontario?

Knob and tube wiring itself is not illegal in Ontario; however, it is considered outdated and is no longer installed in new construction. While you are not required by law to replace it unless deemed unsafe, most insurance companies will refuse coverage for homes with active knob and tube wiring. To meet modern safety standards and improve your home's value, replacing it is strongly recommended.


How Much Does It Cost to Replace Knob and Tube Wiring in Ontario?

The cost to replace knob and tube wiring can vary depending on the size of your home, accessibility, and the complexity of the wiring system. In Sarnia, homeowners can expect to pay anywhere from $8,000 to $15,000 for a complete knob and tube wiring replacement. Factors such as removing old wires, installing new circuits, and restoring walls and ceilings will influence the total cost. Investing in this upgrade not only enhances safety but also increases your home's resale value.


Replacing Knob and Tube Wiring in Plaster Walls

Many older Sarnia homes feature delicate plaster walls, adding a layer of complexity to wiring replacement. At Electrician Sarnia, we specialize in minimizing wall damage while carefully removing old wiring. We use techniques like fishing wires through existing wall cavities to reduce the need for extensive drywall or plaster repairs. In some cases, strategic openings may be made to access tricky wiring paths, but our team takes extra care to patch and restore walls for a seamless finish.


Why Choose Electrician Sarnia for Your Wiring Replacement?

Our experienced electricians are trained in handling knob and tube replacement projects in older homes throughout Sarnia, including neighborhoods like Coronation Park, The Rapids Parkway, and Point Edward. We provide:

✅ Thorough inspections to assess your current electrical system
✅ Safe and code-compliant wiring replacement
✅ Careful restoration of plaster walls to maintain your home’s character
✅ Transparent pricing with no hidden costs

If your home still relies on knob and tube wiring, it’s time to upgrade to a safer, more efficient electrical system. Contact Electrician Sarnia today to schedule your consultation and take the first step toward a safer home. 

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