Knob and tube wiring in Ontario is a not a topic to be considered lightly. If your home features this type of wiring, be mindful that it’s considered out of date. Several issues affect the safety of this wiring, posing critical concerns for your home and family.

At Langstaff & Sloan, knob and tube has been our expertise since 1996, and our top recommendation is to replace this outdated wiring. Keep reading to learn more about key concerns with this type of wiring and how we can help upgrade your home’s electrical system to more modern, safe alternatives.

What is Knob and Tube Electrical?

This type of wiring uses ceramic knobs that support individual wires running along wooden beams. It also features ceramic tubes passing through the wooden beams. These connections are made possible by splicing, soldering, and taping, and while they may have been well done, they’re not very accessible for repairs and/or alterations.

Knob and tube wiring was commonly used in homes built prior to the 1950s. At that time, synthetic wire insulation hadn’t been developed yet. So, houses were being wired with what are now outdated, cloth-based materials that present a range of safety concerns and additional considerations for homeowners.

Not sure which type of wiring your home uses? Read this helpful blog to find out if it’s knob and tube.

Safety Concerns with Knob and Tube Wiring

There are several concerns with the safety of this outdated wiring that could pose risks for electrical fires and/or damage to your home and assets. These concerns include:

The system was built on two-prong outlets, whereas many modern appliances require three prongs. This requires use of adapters, which can increase the risk of overloading your electrical system.
The system does not feature a ground wire that would divert stray electricity away from the circuit and the frame of your house. This increases your risk of shocks, short-circuiting, and electrical fires.
Knob and tube was invented prior to temperature rating tests, and therefore would likely not fare well if placed through trials.
The cover on the wiring, which is made of rubber or cloth, can become brittle over time. If it wears away, your exposed wires will increase the risk of a fire.
Knob and tube wiring is a free air wiring system. The extra layer of rubber cloth insulation on the wires leaves little space for heat to dissipate, which poses a serious fire concern if home insulation is installed over the wiring.
The outdated wiring is not suitable for moist environments. Exposing knob and tube to wet areas can be dangerous and pose risks of shock.
Homeowners and unskilled electricians may have attempted improper alterations over time on their wiring. When work is not completed to code, it can result in bad connections or extended circuits, both of which are dangerous.

Considerations for Homeowners with Knob and Tube Wiring in Ontario

In addition to the noted safety concerns, there are additional considerations to be mindful of for Ontario homeowners who have this outdated wiring.

The first has to do with home insurance. In some instances, it may be possible to secure home insurance if you have outdated wiring, but it likely won’t be easy. This is because insurance companies are wary of the noted safety concerns posed by knob and tube. If you are able to find insurance, the chances are that your premiums will be significantly higher. Learn more about why it’s difficult to get insurance and what questions to ask your insurance company.

The second consideration focuses on your home’s resale value. If you’re planning to sell your home, you may run into challenges with knob and tube decreasing your home’s resale value. There are two key reasons: buyers may overestimate how much it will cost to upgrade the wiring and older wiring can cause your home to stay on the market longer, causing you to drop its price if you’re in a hurry to sell. Learn more about the resale value of a home with old electrical wiring.

Lastly, as a homeowner, you’ll want to be mindful of building code standards and liability concerns. Often, knob and tube will not pass modern building code standards, and you’ll also want to be aware of the safety of your property and your own personal liability. Learn more about these important topics.

Modern Alternatives and Upgrading Knob and Tube Wiring

The good news is that safer, modern alternatives are available. If you’re concerned about the cost, we invite you to connect with us at Langstaff & Sloan as we have extensive experience dealing with old wiring. Our team will offer you a better idea of what needs to be done, the anticipated cost, and how we will complete the work in a professional and reasonable way. This includes our team taking ownership of all patching required to repair any holes made by the wiring replacement.

With a modern electrical system, you’ll benefit from:

Peace of mind in knowing your home is running on a safe, reliable, modern electrical system.
Increased revalue for your property.
A chance to install more outlets and add more lighting during the rewiring project to improve your home and ensure it meets the needs of your family efficiently.

Connect with Knob and Tube Electrical Experts: Langstaff & Sloan

As noted, our team of electrical contractors specializes in upgrading outdated knob and tube systems to modern, safe alternatives. You can rely on us to equip your home with a reliable electrical system and to take ownership of the patching required as part of the project.

We offer written, detailed quotes along with professional, courteous service. Our team will bring excellence to the job and will treat your home with respect. You’ll benefit from peace of mind with our experts handing your rewiring project and be able to rest easy when your home is running on a safe, reliable, modern electrical system.