Home insurance in Manitoba does not legally require you to remove knob and tube wiring, but many insurers will not write or renew a policy on a home that still has it active. Some will cover it only at a higher premium, often after an inspection, and others want it removed before they will issue a policy at all. For most Winnipeg homeowners, that insurance pressure is the real reason knob and tube ends up getting replaced.
If your renewal came back with a condition attached, or a sale stalled on an inspection report, this guide explains what Manitoba insurers actually do about knob and tube, why they treat it the way they do, and how a documented removal turns an uninsurable problem back into a normal house. If you are still trying to confirm whether your home has it, start with our guide on the signs your Winnipeg home has knob and tube wiring.
Not as a matter of law, but as a matter of getting covered, removal is often the only path forward. The Electrical Safety Authority puts it plainly: many insurers will not provide or renew coverage on homes with this wiring because they consider it a higher risk, and some will require you to replace it before they offer a policy. The table below covers the responses we see most often when a Winnipeg homeowner discloses knob and tube.
| How the insurer responds | What it means for you |
|---|---|
| Declines to write or renew | The most common outcome on a home with active knob and tube. You either shop for a specialty policy or remove the wiring. |
| Covers it at a higher premium | Some insurers will cover the home at a surcharge, sometimes only after a licensed electrician inspects the wiring. |
| Requires an inspection first | An electrician’s written report on the condition of the wiring is requested before any decision on coverage. |
| Requires removal before coverage | Coverage is offered only once the knob and tube is removed and you can show the permit and inspection paperwork. |
Which of these you run into depends on the insurer and on how much of the home still runs on the original wiring. What is consistent is that doing nothing is rarely an option once an insurer knows the wiring is there, because the policy is what your mortgage lender relies on too.
Insurers price knob and tube as high-risk because its failure modes line up directly with house fires and electrical claims. The trade publication Canadian Underwriter reports that most insurers view homes with knob and tube wiring, aluminum wiring, and 60-amp service as high-risk, which is enough on its own to keep some homeowners from getting standard coverage.
The underlying reasons are the same ones that make the wiring worth replacing: there is no ground, the original insulation goes brittle with age, and the system overheats when it is buried under attic insulation or asked to carry modern loads. We explain those mechanics in our signs of knob and tube guide. From the insurer’s side, the point is simpler. The wiring raises the odds of a claim, so they either build the risk into the premium or step away from the policy.
Yes. If you know your home has knob and tube wiring, you are expected to disclose it, and leaving it off an application is the kind of omission that can come back to bite you when you file a claim. Non-disclosure of a material fact like active knob and tube can give an insurer grounds to reduce or deny a claim, which defeats the entire purpose of carrying the policy.
This matters most at two moments: when you buy a home and arrange coverage, and at each annual renewal. Manitoba insurer Red River Mutual recommends homeowners have a licensed electrician inspect older wiring and replace anything that has been modified or buried, which is the documentation an insurer wants to see anyway.
Removing the knob and tube and getting the work permitted and inspected takes the home out of the high-risk category and makes it insurable on normal terms again. That is the outcome that matters, and it is the part most articles skip. Once the original wiring is gone and replaced with grounded copper, the house is no longer the one the insurer was worried about, and you have the permit and inspection records to prove it.
The same paperwork settles a sale. When a buyer’s home inspection flags knob and tube, the deal often stalls because the buyer cannot get their own insurance lined up, and a lender will not finance a home the buyer cannot insure. Handing over documentation that the wiring was professionally removed and inspected removes that obstacle for the buyer, their insurer, and their lender at once.
The job starts with tracing how much of the home still runs on knob and tube, because that decides the scope. If only a few circuits are left on the old system, we remove them and tie the new grounded wiring into your existing modern circuits. If most of the house is still original, a full home rewiring is the cleaner fix. Either way, the work is done to the Manitoba Electrical Code, permitted, and inspected, so you finish with the records your insurer and a future buyer will ask for. Older homes that need this work often have an undersized panel or some early aluminum wiring as well, and it is usually more efficient to handle those at the same time. A few situations we see regularly in Winnipeg:
If you only need to know where you stand, an electrical inspection gives you the written assessment that insurers commonly request, and our knob and tube removal cost guide for Winnipeg covers what the work itself typically runs. If removal turns out to be the path, our guide on what to expect during a knob and tube removal walks through the work step by step, and how knob and tube compares to modern wiring shows what actually changes in your home.
It can be. Many Manitoba insurers will decline to renew a policy once they know a home has active knob and tube, and some give a short window to have it removed before coverage lapses. Others continue coverage at a higher premium or after an inspection. The outcome depends on the insurer, which is why it is worth dealing with the wiring before a renewal forces the issue.
Yes, you can sell a home that has knob and tube, but it usually complicates the sale. Buyers often struggle to arrange their own insurance, and lenders will not finance a home the buyer cannot insure, so deals stall on the inspection. Removing the wiring beforehand, or providing documentation of a professional removal, keeps the sale moving.
Yes. Knob and tube is a material fact, and if you know about it you are expected to tell your insurer when you apply and at renewal. Failing to disclose it can give the insurer grounds to reduce or deny a future claim, so disclosing it is in your own interest even though it may affect your premium.
Often, yes. Once the knob and tube is gone and the home is wired with grounded copper, it is no longer in the high-risk category that drove the surcharge or the refusal, so insurers will generally offer standard terms. You will need the permit and inspection paperwork to show the work was done properly.
It can be. Lenders rely on the home being insurable, and if an insurer will not cover a house with active knob and tube, the financing can stall along with it. Buyers of older Winnipeg homes sometimes need proof that the wiring has been removed or is being removed before a lender will finalize the mortgage.
If knob and tube is holding up your insurance, your sale, or your mortgage, we can remove it, document the work, and give you the records that put the question to rest. Learn more about our knob and tube removal service.
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