Knob & Tube Replacement
Knob-and-tube wiring was standard before the 1950s but is now considered a significant safety hazard. We safely remove and replace it with modern wiring.
What We Offer
- Complete knob-and-tube removal
- Modern NMD90 copper wire replacement
- Proper grounding (original had none)
- Insurance compliance documentation
- Insulation can be safely added after
- ESA inspection and certificate
The Details
Knob-and-tube wiring lacks a ground wire, uses degraded rubber insulation that cracks and exposes conductors, and cannot handle modern electrical loads. Many insurance companies refuse to cover homes with active K&T wiring. Our rewiring process involves carefully removing old wiring, running new NMD90 cables through walls, installing modern receptacles with grounding, and providing documentation for your insurance company.
Knob & Tube Replacement FAQs
Full knob-and-tube replacement in a typical Toronto home runs $9,000–$15,000 depending on home size, wall finishes, and accessibility. Many homeowners phase the work by floor. The price includes new NMD90 copper wiring, grounded outlets, ESA permit and inspection, and insurance documentation.
It isn't illegal, but it's a recognized fire and insurance risk: no ground wire, brittle insulation, and no capacity for modern loads. Most insurers refuse new policies or charge steep premiums on homes with active K&T, which is why buyers and sellers usually replace it.
Yes. We specialize in fishing new wiring through finished walls with minimal, strategic openings — particularly important in Toronto's century homes with original plaster and trim. Patching is dramatically cheaper than re-plastering entire walls.
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