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Langstaff & Sloan
Langstaff & Sloan

Knob and Tube Wiring Replacement in
Mississauga

Contact Us For a Consultation
CALL 416-503-2033

Safe Knob and Tube Wiring Replacement in Mississauga

For homeowners in established Mississauga neighborhoods like Port Credit, Streetsville, and Clarkson, finding vintage charm often comes with a hidden challenge: outdated electrical systems. If your home was built before the 1950s, there is a high probability that it still relies on knob and tube. While this system was cutting-edge eighty years ago, today it poses significant safety risks and insurance hurdles.
 
At Langstaff & Sloan, we have provided professional electrical services since 1991. We specialize in the complex process of knob and tube wiring removal, helping homeowners bring their properties up to modern safety standards. We do not offer quick fixes; we offer a comprehensive, code-compliant solution that protects your family and your investment.

The Dangers of Old Wiring Tube Systems

Knob and tube electrical wiring uses individual copper conductors supported by porcelain knobs and run through ceramic tubes. Unlike modern wiring, it has no grounding conductor and relies on insulation that degrades over time.
 
As that insulation becomes brittle, live wiring can be exposed to dust, moisture, and surrounding insulation. Combined with modern electrical demand, the risks increase significantly.
Common dangers include:
 
  • Overheating from circuits never designed for today’s appliance loads
  • Increased fire risk due to cracked or missing insulation
  • Ungrounded outlets that fail modern safety expectations
  • Insurance denial or policy cancellation
 
Because of these risks, most insurance providers now require knob and tube removal before issuing or renewing coverage.

Our Proven Process for Knob and Tube Replacement

We understand that changing knob and tube wiring feels like a daunting renovation project. Many homeowners fear their walls will be destroyed in the process. Langstaff & Sloan take a different approach. We have refined a specialized method for replacing knob and tube wiring in plaster walls that minimizes disruption to your home’s interior.

Our knob and tube wiring replacement process follows a strict safety protocol:
 
  1. Detailed assessment: 
    We perform a thorough audit to locate all active knob and tube circuits.

  2. ESA permits & coordination:
    We handle all necessary permits with the Electrical Safety Authority (ESA) and coordinate with your local utility provider if a service upgrade is required.

  3. Surgical removal & rewiring:
    We fish new, grounded copper wiring through your existing wall cavities. Our technicians are skilled at minimizing holes, often making small surgical cuts rather than tearing down walls.

  4. Panel integration:
    We upgrade your main panel to accommodate the new circuits, ensuring your home has the capacity for modern electronics.

  5. Patching & cleanup:
    Unlike many contractors who leave you with the mess, we respect your home. We ensure holes are patched, and the workspace is clean.

Understanding Knob and Tube Replacement Cost

One of the most common questions we receive is about the knob and tube replacement cost. Because no two vintage homes are identical, providing a “cookie-cutter” price is impossible without an assessment. The cost depends on several factors:

Size of the home:

A 2-storey home in Mineola requires more labor than a bungalow in Malton.

Accessibility:

How easily can we access the ceilings and floor joists?

Extent of knob and tube wiring:

Some homes have been partially updated, while others are 100% original.

Wall composition:

Working behind the lathe and plaster requires more time and care than drywall.

While knob and tube wiring removal cost is a significant investment, it directly increases your property value. More importantly, it is often less expensive than the premiums associated with high-risk insurance policies or the cost of fire damage. We provide transparent, detailed quotes so you know exactly where your budget is going.

Insurance Requirements and Knob and Tube Removal

Insurance carriers are increasingly strict. Most companies will require a full inspection report confirming that all knob and tube electrical components have been deactivated and replaced before they will issue or renew a policy.
 
We work directly with your requirements. Once we complete the upgrade knob and tube wiring project, we arrange for the final ESA inspection. You will receive a Certificate of Acceptance, which acts as the “golden ticket” for your insurance provider, proving your home is safe and compliant.
commercial electrical contractor

Why Choose Langstaff & Sloan for Knob and Tube Wiring?

We are not general handymen; we are licensed electrical contractors with over 30 years of experience in the Greater Toronto Area. We know the unique structural quirks of Mississauga’s older housing stock.
 
Since 1991:

We have decades of experience specifically with updating knob and tube wiring.

Minimal damage:
We treat your home with respect, utilizing techniques that preserve your vintage walls and ceilings.
 
Safety first:
We strictly adhere to the Ontario Electrical Safety Code.
 
Turnkey service: From the first inspection to the final patch, we manage the entire project.
 
If you suspect your home contains knob and tube electrical wiring, do not wait for a flickering light or a tripped breaker to investigate.

Secure Your Home Today

Don’t let outdated wiring compromise your safety. Contact Langstaff & Sloan today to schedule a professional assessment of your electrical system. Let us provide you with a clear plan to upgrade knob and tube wiring and restore your peace of mind.
Get Your Safe and Clear Plan Today, Free

How Electrical Contractors in Toronto Can Help

At Langstaff & Sloan, we are well versed in electrical projects of all kinds. As licensed home electricians in Toronto, we’ve worked with homeowners on everything from green technology to adding exterior lighting to their backyard oasis. When it comes to commercial electrical work, we can help ensure that your workspaces are functioning efficiently and that you have the power you need to be as productive as possible.

As qualified local electricians in Toronto, here are some of the ways that Langstaff & Sloan can support your needs:

Commercial Services

  • Submetering.
  • New and retrofit lighting.
  • Standby generators.
  • Leasehold improvements.
  • Service calls.
  • Code compliance.

Residential Services

  • Emergency service calls.
  • Knob and tube rewiring.
  • Renovation wiring.
  • Electrical panel upgrades.
  • Whole-home assessments.
  • Aluminum rewiring.
  • Smart home wiring.
  • Basic repairs.

Frequently Asked Question

Is it illegal to have a knob and tube in Mississauga? 

It is not illegal to live in a house with existing knob and tube wiring, but it is a violation of the building code to install new knob and tube. However, insurance companies may effectively force you to remove it by denying coverage.

How do I know if I have knob tube wiring? 

Look in your basement or attic. If you see white ceramic knobs nailed to joists with single wires running through them, you likely have this system. You may also notice ungrounded (two-prong) outlets throughout the house.

Can you just add a ground wire without knob and tube removal? 

No. The insulation on wiring tube systems is likely deteriorated. Adding a ground wire does not solve the issue of brittle insulation or the inability to handle modern electrical loads. Full knob and tube replacement is the only safe solution.

How long does knob and tube wiring removal take? 

For an average-sized home in Mississauga, the rewiring process typically takes between one and two weeks. We work efficiently to minimize the time you are inconvenienced.

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