Water damage is the most common home insurance claim in Canada, and it is also the one with the most confusion about what is covered. Ontario policies are not all the same, but they share a structure. A standard policy covers water that escapes suddenly from something inside the house. Water that comes from outside, from the sewer, or slowly over time is either an optional add-on or excluded. Knowing which category your loss falls into before you call your insurer helps you ask the right questions and avoid surprises.
What does a standard Ontario home policy cover?
The base coverage on most Ontario homeowner policies is sudden and accidental escape of water from a plumbing, heating, air conditioning or sprinkler system, or from a household appliance. In practice this means a burst pipe, a split supply hose on the dishwasher or washing machine, a failed water heater tank, or a toilet supply line that lets go. The policy pays to dry the home, remove and replace damaged building materials, and repair or replace damaged contents, minus your deductible. The plumbing repair itself, such as the section of pipe that burst, is often not covered, but the resulting damage is.
| Cause of water damage | Typical treatment | Notes |
|---|---|---|
| Burst or leaking pipe, sudden | Standard coverage | Resulting damage is covered; the pipe repair itself often is not |
| Appliance hose or tank failure | Standard coverage | Includes washing machines, dishwashers and water heaters |
| Frozen pipe, heat maintained or water shut off | Standard coverage | Conditions apply during the heating season |
| Frozen pipe, home left unheated and unchecked | Usually excluded | Most policies require the home be checked or the water shut off |
| Sewer or septic backup | Optional endorsement | Sold separately since around 2015; often has its own limit |
| Overland flooding | Optional endorsement | Availability and price depend on flood risk |
| Groundwater seepage through foundation | Usually excluded | Treated as a maintenance and waterproofing issue |
| Slow leak over weeks or months | Usually excluded | Insurers treat it as wear, tear or neglect |
| Storm damage to roof letting rain in | Standard coverage | Covered when the cause is a sudden event, not worn shingles |
Which water coverages are optional in Ontario?
Sewer backup
Sewer backup coverage pays when water or sewage comes up through floor drains, toilets or showers because the municipal sewer or your own drain line cannot handle the volume. It has been sold as a separate endorsement in Ontario since roughly 2015, after several large storm events led insurers to remove it from base policies. It often carries its own coverage limit and may have a separate deductible. Some insurers require a backwater valve before offering full limits.
Overland water
Overland water coverage responds when water enters the house from the surface: a river overflowing, heavy rain pooling against the foundation, or melting snow running in through a window well. It was introduced in Canada around 2015 and is priced by flood risk, so homes near rivers or in low-lying areas pay more or may be declined. Without it, a rainstorm that sends water through the basement door is not covered, even though a burst pipe on the same day would be.
What does home insurance not cover?
The most common exclusions are gradual damage and groundwater. If a pipe dripped inside a wall for months, or a window well let water seep in every spring, insurers treat it as a maintenance issue rather than a sudden event. Water rising through the foundation floor or walls from saturated soil is groundwater seepage and is excluded on almost every policy. Mould is often limited or excluded unless it results from a covered loss and is reported promptly. Damage from a sump pump failure may need its own endorsement. Read the exclusions section of your policy rather than assuming.
- Groundwater seepage through foundation walls or the floor slab
- Slow leaks and repeated seepage the homeowner could have noticed
- Water damage while the home is vacant beyond the period your policy allows
- Frozen pipes when heat was not maintained and no one checked the house
- Wear, rust, corrosion and deterioration of the plumbing itself
- Mould that developed because a leak was not reported promptly
What are the frozen pipe rules during heating season?
Most Ontario policies attach conditions to frozen pipe claims. If you are away during the heating season, typically October through April, the policy usually requires that you either shut off the water supply and drain the pipes, or arrange for a competent person to enter the home regularly to check that heat is maintained. Many policies specify every few days, and a four consecutive day rule is common, meaning a claim can be denied if the home was unattended for four or more days. Check your own wording, because some insurers use different intervals.
Before you leave, either shut the water off at the main and open the taps to drain the lines, or arrange for a neighbour or family member to check the home every few days and keep a written log with dates. That log is your evidence if a pipe freezes while you are gone.
How does a water damage claim work in Ontario?
- Make the home safe, stop the water and call a restoration company for extraction and drying
- Photograph and video the damage and the source before anything is moved
- Report the claim to your insurer and get a claim number
- The insurer assigns an adjuster, who may visit or review photos, moisture readings and the restoration scope
- The restoration estimate is often prepared in Xactimate, the pricing platform most insurers use
- You pay the deductible, which some insurers set higher for water losses
- With a Direction to Pay, the restoration company bills the insurer directly for the rest
Deductibles for water losses have risen in recent years, and some insurers set a separate, higher water deductible. Ask what yours is when you report the claim. If the repair cost is close to the deductible, you may choose not to claim, since water claims can affect renewal pricing. RapidDry Restoration works with a Direction to Pay so you pay only the deductible, and we provide moisture logs and photos in the format adjusters expect.
How can you reduce the risk of a denied claim?
Report quickly, document thoroughly and mitigate promptly. Insurers expect homeowners to take reasonable steps to prevent further damage, and a delay of days can be used to argue the loss became gradual. Keep receipts for emergency measures. Do not dispose of damaged items until the adjuster has approved it. Maintain your home: replace rubber appliance hoses with braided steel, clean eavestroughs, and install a backwater valve and sump pump. The City of Toronto Basement Flooding Protection Subsidy Program offers a subsidy toward a backwater valve, sump pump and downspout disconnection, and some insurers offer discounts for these devices.
If a claim is denied and you believe the cause was sudden, ask for the denial in writing with the policy wording it relies on. A leak detection report or a restoration company's source assessment can sometimes change the outcome, particularly when the question is whether a leak was gradual or sudden. Your broker can also escalate on your behalf.
Frequently asked questions
Does home insurance cover water damage from a leaking roof in Ontario?
Usually yes, if the leak resulted from a sudden event such as wind tearing off shingles or a fallen branch. If the roof leaked because the shingles were worn out or the flashing had deteriorated over years, the damage is generally excluded as wear and tear. Keep records of roof inspections and repairs so you can show the roof was maintained.
Is basement flooding covered by home insurance?
It depends on the cause. A burst pipe or a failed water heater in the basement is covered under a standard policy. Sewer backup and water entering from outside during a storm need optional endorsements. Groundwater seeping through the foundation is excluded on nearly all policies. Check your declarations page for the words sewer backup and overland water to see what you carry.
Will a water damage claim raise my premium?
It can. Insurers look at claims history at renewal, and water claims are the most frequent and costly type. A single claim may or may not change your rate, but multiple claims in a few years often do. Some insurers also add a higher water deductible after a claim. Weigh the repair cost against your deductible and the possible renewal impact before filing a small claim.
What is a Direction to Pay?
A Direction to Pay is a form you sign that authorises your insurer to pay the restoration company directly for covered work. You pay only your deductible. It saves you from paying the full invoice up front and waiting for reimbursement. RapidDry Restoration uses this arrangement on most insured jobs and provides the documentation the adjuster needs.
Does insurance cover the cost of finding the leak?
Often yes, when the leak is a covered loss. Many policies pay for the reasonable cost of locating the source and for tearing out and replacing the part of the building needed to reach it. The repair of the pipe itself is frequently excluded. Ask your adjuster before authorising work, and keep the leak detection report as part of the claim file.