Does Home Insurance Cover Mold Removal in Canada?
Usually not on its own. Canadian home policies typically exclude damage caused by mould, fungi and rot. What changes the answer is where the water came from.
If the mold grew because of a sudden, accidental event your policy covers, like a supply line that burst, the cleanup can be part of that water damage claim. If it came from a slow leak, ongoing humidity, or a flood you had no add-on for, it usually isn’t. Below is what real Canadian policy wordings say, how the difference between a sudden leak and a slow one shows up on a wall, and what to do before anything gets torn out.
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Stop the source if you safely can, then call your insurer or broker. Your policy expects you to limit further damage, and getting the water out and the structure dried is a job for a water restoration company. Once the water is dealt with, a free virtual mold inspection can tell you what the mold side looks like before anything gets thrown out or opened up. Virtual inspections are available across Ontario and Quebec.
Book Your Free Virtual Inspection NowWhat do Canadian home insurance policies actually say about mold?
Most articles on this question paraphrase. Here’s the actual language. There’s no single standard home policy in Canada: each insurer writes its own wording, and the only part fixed by law is the statutory conditions most provinces require (Quebec uses its Civil Code instead). But on mold, the wordings line up closely. Every Canadian homeowner and condo form we reviewed excludes damage caused by fungi or rot. (Insurers spell it “mould.” Same thing.)
Intact Insurance, homeowners comprehensive form (2018 edition)
“We do not insure loss or damage: … caused by rust, corrosion, wet or dry rot, fungi or spores, bacteria, condensation, acid rain or contamination;”
The same form defines fungi as including “any form or type of mould, yeast, mushroom or mildew.”
TD Insurance, homeowner form
“Loss or damage caused by rust, corrosion, dampness, condensation, extremes of temperature, wet or dry rot, fungi or spores.”
Then, in the same clause: “However, we insure loss or damage caused directly to insured property by an insured peril resulting from such gradual damage.”
Square One, sample home wording
“caused by rust or corrosion, wet or dry rot, fungi, spores, bacteria, mould, condensation, acid rain, or smog, except for damage to Service Lines;”
Desjardins, Quebec owner-occupier form
Excludes damage caused by “les champignons ou les spores” under gradual damage, and like TD it adds that it still covers damage caused directly by a covered peril that results from that gradual damage. Its definition of champignon names “les moisissures” (moulds) explicitly.
So the honest short answer is no, mold isn’t covered as mold. The longer answer is that some wordings say outright that damage from a covered event still counts even where gradual damage is involved, and others don’t have that sentence next to the exclusion at all. Which one you have matters, and it’s printed in your policy.
Excerpts from published sample or specimen wordings, which insurers note can vary by province and are not your contract: Intact form 80703 v2, 10-18 (PDF hosted by a broker), TD homeowner form (Feb 2026), Square One sample wording (Sept 2025), Desjardins form 943 160 (Mar 2025, French; English summary ours). Statutory conditions: Ontario Insurance Act, s. 148.
When does home insurance cover mold?
The Insurance Bureau of Canada puts the principle in one line: “Insurance is meant to cover sudden and accidental loss or damage.” Writing about ice dams, it adds that “ongoing or repeated damage is considered a long-term maintenance issue and may not be covered,” and elsewhere, more bluntly, “A home insurance policy is not a maintenance contract.”
Mold sits right on that line. It’s almost never sudden itself. It’s what happens after water. So the claim lives or dies on the water event that came first, and on whether your policy covers that event.
An underwriting manager at Square One gave the textbook covered example to Rates.ca: “someone’s hot water tank accidentally bursts in the basement while they’re away and all that humidity causes water damage throughout the basement and mould grows as a result of that water.” Rates.ca sums up the other side: “mould that arises due to persistent negligence would not be covered.”
Can be part of a covered claim
Mold that follows a sudden, accidental escape of water from plumbing, heating, or an appliance inside the home, found and reported promptly.
Often only with an add-on
Sewer backup, overland flooding and ground water seeping through a foundation are optional coverages on most policies. Rain getting in through the roof or walls varies: some policies include it, and some insurers, like TD, sell it as a separate add-on.
Usually excluded
Growth from a slow drip, repeated seepage, condensation, high humidity, poor ventilation, or general wear and tear. These read as maintenance, not accidents.
Quotes from the Insurance Bureau of Canada pages on flood and water damage and types of home coverage, and from Rates.ca.
Why a slow leak usually means no coverage, even if you didn’t know about it
This is the clause that surprises people most. Several wordings exclude continuous or repeated leaks regardless of whether you knew the leak was there. TD’s homeowner form excludes damage from water “originating from continuous or repeated escape, overflow or backing up of water, whether or not you were aware of such escape, overflow or backing up.” Desjardins says the same in French: “qu’ils soient connus ou non de vous.” Intact’s water damage coverage is built around sudden and accidental events, such as a “sudden and accidental escape of water” from plumbing, and it does not cover damage “caused by continuous or repeated seepage or leakage of water.”
So the common story (the leak was hidden inside the wall, so how could I have known?) doesn’t automatically rescue the claim. What the adjuster is trying to work out is how long that water was there, not whether you saw it.
Widespread growth across a damp basement surface, like this, usually points to moisture that has been there for a while rather than one sudden event.
The remediation industry draws the same line insurers do. ANSI’s summary of the mold remediation standard, ANSI/IICRC S520 (fourth edition, 2024), says the standard “assumes that determining and correcting the underlying cause of mold contamination is the responsibility of a property owner, landlord, or their agent(s), and not the remediator, although a property owner may contract with a remediator or other professional to perform these services.” Fix the water, then fix the mold. Insurance follows the same order.
Sources: TD homeowner form, Desjardins form 943 160, Intact form 80703, and the ANSI summary of S520-2024.
Sudden leak or slow leak: how the difference shows up on a wall
The insurer and broker pages we read on this topic don’t explain this part, and it’s often the part that decides the claim. When a wall gets opened after water damage, the materials tend to tell you whether they got wet once or many times. These are the things we look at on water-damage jobs, and the kind of evidence an adjuster may weigh too.
Signs that point to one event
A single, identifiable source with a date you can name. Dampness that spreads outward from one point and is still wet when it’s checked. Staining with one edge rather than rings. Growth limited to the area that got soaked, on materials that are otherwise sound.
Signs that point to a long-running leak
Several rings of staining, each one a separate wet-dry cycle. Wood that’s soft or crumbling deep in, not just on the surface. Corrosion or mineral crust around a fitting that has been weeping. Growth spread across a wide area or through the back of the drywall, well past where one event would have reached.
One way people hurt their own claim isn’t anything they say to the insurer. It’s tearing out the wet drywall over a weekend and putting it in the bin before anyone has seen it. The evidence of a sudden event goes out with the trash, and what’s left is a stained stud that could have been wet for a year.
Moisture readings and infrared images of water damage taken before demolition give you a dated record of where the water was and how far it reached. That record is useful whatever the insurer decides.
Sewer backup, flooding and ground water: do the add-ons cover mold?
Water that comes up through the drains or in from the ground or a flooded river sits outside a standard policy. The IBC says damage from sewer backup “is typically not covered by a standard policy” and that overland flooding “is typically not covered by a standard policy” either. Both are sold as optional coverage. TD also lists ground water coming through the foundation, and water entering through the roof or above-ground walls, as separate add-ons. Roof water is where insurers differ most: the IBC says a typical policy covers water damage inside the home from a roof leak, though not roof damage caused by wear and tear.
Two things are worth knowing if you have one of these endorsements. First, it covers the water event; the mold question still follows the rest of your policy. Intact’s form, for example, ends each of its added coverages, water damage included, with: “All other terms, conditions, provisions and exclusions of the policy to which this coverage applies remain unchanged.” Second, even a sewer backup endorsement can exclude continuous or repeated seepage. The sudden-versus-gradual question doesn’t go away.
Sewer backup
Water or sewage backing up through floor drains, toilets or the main line. Optional on most policies.
Overland water
Fresh water from a river or dam overflowing onto dry land, or heavy rain and snowmelt, then getting into the house.
Ground water
Water seeping in through below-grade walls, the foundation or the basement floor.
Above-ground water
Rain or melting snow and ice getting in through the roof, walls, doors or windows. Included in some policies, a separate add-on with others.
Attic mold is a good example of why the cause matters. A roof leak may be covered by the policy itself or by an above-ground water add-on, depending on your insurer, but attic mold more commonly comes from warm, moist air condensing on cold sheathing, and condensation is excluded in most wordings. (More on how we handle it on our attic mold removal page.)
Sources: IBC on flood and water damage, TD on water damage coverage, Intact form 80703, and SE Mutual’s sewer backup endorsement.
Just over a decade ago, overland flood insurance was largely unavailable to many Canadians. According to the Insurance Bureau of Canada, more than 30 insurers now offer some form of overland flood coverage, about 94% of homes are eligible for it, and the share of households with flood insurance rose from 26% in 2017 to 71% in 2023. If you bought your policy years ago, it’s worth asking your broker whether yours includes it. (IBC, July 2026)
How to claim for mold after water damage: what to do first
Most of what goes wrong with these claims happens in the first few days, before anyone from the insurer has seen the house. The IBC’s own claim guidance, and the statutory conditions in Ontario’s Insurance Act, cover the basics.
Limit the damage
Your policy requires you to act to limit further damage. In Ontario, the statutory conditions also say the insurer contributes proportionately to reasonable costs of doing that.
Report it quickly
Tell your insurer or broker as soon as possible. Ontario’s statutory conditions call for written notice “forthwith.” Waiting weeks makes a sudden event harder to prove.
Photograph everything
The source, the wet areas, the damaged items. Make a list of what was damaged. Dated photos taken on day one are worth more than a description later.
Keep every receipt
Cleanup, drying equipment, emergency plumbing, hotel nights if you had to leave. Your insurer can ask for them.
Ask before you throw out
The IBC says to keep damaged items unless they’re dangerous, and to confirm with your insurer before disposing of damaged property. That includes wet drywall.
Watch for the proof of loss
Your insurer will usually send a sworn proof of loss form, which the IBC says is typically due back within 30 days. Check the deadline on yours.
Two more points from the IBC that people often don’t realize. You can use a contractor or supplier of your choice for repairs. And an adjuster or claims specialist will contact you once the claim is filed, so the evidence you’ve kept is what they’ll be working from.
In Quebec, the Autorité des marchés financiers adds that you should wait for the insurer’s authorization before going ahead with any permanent repairs, and that once a claim is accepted the insurer must pay within 60 days of receiving your notice of claim or the supporting documents it asked for.
Sources: IBC, how to file a home insurance claim; Ontario Insurance Act, s. 148, statutory conditions 6 and 9; AMF, filing an insurance claim.
Get the mold documented before the walls come out
Once the water is stopped and drying has started, the next useful thing is a clear record of the mold side.
A free virtual inspection tells you within one call whether what you’re seeing needs a proper inspection. If it does, our on-site inspection gives you a dated report you can hand to your adjuster. We serve Ontario and Quebec.
Or call 1-877-566-6653, 24/7.
What a mold inspection gives you for a claim, and what it doesn’t
Let’s be straight about our role, because plenty of contractors blur it. We document. The claim is yours. You stay our client, you deal with your insurer, and we give you the evidence.
A mold inspection report records where the mold is and how far it extends, moisture readings and infrared images showing where the water went, photos, and lab results where samples are taken. Samples go to independent testing laboratories accredited by CALA to ISO/IEC 17025:2017, so the findings aren’t produced in house. If remediation is needed, the report’s written recommendations say what should be done and in what order, which your adjuster can compare against quotes.
What we don’t do is interpret your policy, negotiate with your insurer, or promise an outcome. And we’re not a water restoration company: extraction and drying come first, from a restoration contractor. Our water damage inspection is about finding where the moisture is and what it has done, not drying it out.
If the claim isn’t approved and the cost lands on you, there are financial assistance options for remediation projects, and our guide to mold removal costs explains what drives the price.
Does tenant, condo or landlord insurance cover mold?
Different policy, same basic logic, plus one extra question: whose problem is the building?
Tenants
Tenant insurance covers your possessions and your liability, not the building. The building is the landlord’s responsibility.
In Ontario, the Residential Tenancies Act makes landlords responsible for keeping units “in a good state of repair and fit for habitation.” In Quebec, the Tribunal administratif du logement lists “the presence of mould or fungus” as an example of unsanitary conditions.
Condo owners
The IBC notes the condo corporation’s policy does not cover your personal contents, improvements to your unit, or your liability. Your own unit policy does, and TD’s condo form carries the same fungi exclusion as its homeowner form.
In Quebec, the AMF says to inform your syndicate of co-owners when a loss affects the building or your unit.
Landlords
The same sudden-versus-gradual test applies to a rental property policy, with the added duty to repair toward your tenants.
If you manage rental units, our page for property managers covers response and documentation. Commercial buildings run on different policies; see commercial real estate.
Sources: IBC, types of home coverage; Residential Tenancies Act, 2006, s. 20(1); TAL, unsanitary conditions; AMF, insuring your condo unit and building.
What if your mold claim is denied?
Start by asking for the reasons in writing, with the exact policy wording the insurer is relying on. Then compare it with your own copy. Sometimes the disagreement is about the facts (sudden or gradual) rather than the wording, and that’s where documentation from the time of the loss matters most.
If you still disagree, the IBC sets out four steps in order: speak with your insurance representative, contact your insurance company’s ombudsman, contact the General Insurance OmbudService (GIO), then contact the superintendent of insurance in your province. In Ontario that’s the Financial Services Regulatory Authority. In Quebec, the AMF says a firm must give you its final response in writing and offer to transfer your file to the AMF, and it warns that “the complaint process does not interrupt the prescription period for bringing a court action.”
In Quebec you can also hire an independent adjuster at your own expense to help with the claim. For anything about deadlines or suing, talk to a lawyer. That’s not advice a mold company should be giving you.
Sources: IBC, dispute resolution; AMF, making a complaint and filing an insurance claim.
Quebec: insurance, hidden defects and mold you find after buying
Quebec homeowners have the same policy logic (Desjardins’ wording excludes gradual damage and fungi, with the covered-peril carve-back described above), plus the AMF rules on waiting for authorization and the 60-day payment window.
There’s also a separate route that has nothing to do with insurance. If you bought a house and found mold that was hidden at the time, it may be a hidden defect (vice caché). Éducaloi lists “mould in the walls” among its examples. The buyer has to notify the seller in writing within a reasonable time of discovering the defect, so don’t sit on it, and speak to a lawyer early. Our guide to buying or selling a home with mold covers how this works.
For Montreal specifically, see home insurance and mold removal in Montreal.
Sources: Éducaloi, hidden defects in homes and what you can do.
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Frequently asked questions
Not on its own. Canadian home policies typically exclude damage caused by fungi, mould and rot. Mold can be part of a claim when it results from a sudden and accidental event the policy covers, such as a burst pipe inside the home. Mold from slow leaks, condensation, humidity or poor maintenance is usually excluded. Wordings differ between insurers, so check your own policy or ask your broker.
The colour or type of mold makes no difference to coverage. Policies exclude fungi generally, and Intact’s 2018 homeowners form defines fungi as including any form or type of mould. What decides the claim is the water event that caused the growth and whether your policy covers that event.
It can be. Several Canadian wordings exclude damage from continuous or repeated leaks whether or not you were aware of them. TD’s homeowner form and Desjardins’ Quebec form both say this. The question an adjuster asks is how long the water was there, not whether you saw it, which is why documenting the damage before demolition matters.
The Canadian wordings we reviewed handle mold through exclusions rather than a separate capped amount, and we found no standard Canadian mold limit. Your policy may still set limits on water damage or other coverages, so check your declarations page and ask your broker rather than relying on a figure from a website.
Policies differ. The IBC says a typical home policy covers water damage inside the home from a roof leak, but not roof damage caused by wear and tear, while some insurers sell water through the roof or above-ground walls as an add-on. Attic mold more commonly comes from condensation and poor ventilation, which most wordings exclude. Ask your insurer how your policy treats roof water.
Tenant insurance covers your possessions and your liability, not the building. Mold in the building itself is generally the landlord’s responsibility. In Ontario, landlords must keep rental units in a good state of repair and fit for habitation, and in Quebec the Tribunal administratif du logement lists mould as an example of unsanitary conditions. Whether damaged belongings are covered depends on your policy wording.
You must act to limit further damage, but check with your insurer before throwing out damaged materials or starting permanent repairs. The IBC advises confirming with your insurer before disposing of damaged property, and in Quebec the AMF says to wait for the insurer’s authorization before permanent repairs. You can choose your own contractor for the work.
No. You stay our client and the claim stays yours. We provide the documentation: an inspection report with the extent of the mold, moisture and infrared findings, photos, lab results where samples are taken, and written recommendations you can give your adjuster. We don’t interpret policies or negotiate with insurers. We serve Ontario and Quebec.
Ask for the reasons and the policy wording in writing. The Insurance Bureau of Canada sets out four steps: speak with your insurance representative, contact your insurer’s ombudsman, contact the General Insurance OmbudService, then contact your provincial superintendent of insurance. In Quebec, a complaint does not stop the time limit for going to court, so speak to a lawyer about deadlines.
This guide explains how Canadian home insurance policies generally treat mold. It is general information, not legal or insurance advice, and policy wordings differ between insurers and provinces. Read your own policy and speak to your broker or insurer about your situation.
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