The Water Line

Read this first

According to industry survey data, roughly seven in ten Canadians cannot accurately describe what their own home insurance actually covers. That is not a knock on homeowners, it is a description of how the product is sold. Policies are written in insurance language, sold in a single meeting, then forgotten about until the day something goes wrong and it is too late to change anything.

This guide takes the opposite approach. It starts from the actual idea behind insurance, builds up through how policies are structured, walks through the full landscape of what is covered and what is not, and ends with the practical mechanics: what determines your premium, what a condo adds on top, and what your lender needs before they will fund your mortgage. Read it once in order. After that, it is a reference.

How to use this guide

The early sections build the foundation: what insurance is, how policies are structured, and what they cover by default. The water section goes deep on its own, since it is the single most common and most misunderstood claim in Ontario. The questions section is written as an actual script for your next call with a broker.

If you remember nothing else, the four things that matter most

• Whether your policy is named perils, broad form, or comprehensive changes more about your protection than any single add-on does. Most homeowners have never checked which one they have.
• A standard policy covers sudden, accidental water damage. It generally does not cover sewer backup or outside flooding unless you have added those separately.
• Whether your payout is based on replacement cost or actual cash value can be a bigger swing than any deductible. Confirm which one you have, in writing.
• Own a condo, rent out a unit, or leave a property vacant for a stretch? Each of those changes which policy actually applies, and a standard policy can go silent exactly when you need it most.

What home insurance actually is

Before getting into what a policy covers, it is worth understanding what insurance is actually doing, because the mechanics of every rule that follows come back to this one idea.

This is also why insurers care so much about risk, both yours specifically and the property's. An insurer that takes on too many high-risk homes without pricing for it cannot pay out when a bad year hits. Every underwriting question you get asked, every premium factor further down this guide, and every exclusion exists because of this basic economics, not because an insurer is trying to avoid paying you.

Is it actually legally required?

Not in the way car insurance is. Ontario does not have a law forcing every homeowner to carry a policy. In practice, it is unavoidable for almost everyone, for two separate reasons.

• Your mortgage lender requires it. As a condition of funding your mortgage, virtually every lender requires proof of adequate home insurance before closing, and names itself on the policy to protect its loan.
• Your condo corporation may require it. Many condo corporations require unit owners to carry their own policy as a condition of ownership, on top of what the corporation's own master policy provides.

You are not legally forced to buy home insurance. You are just never actually free not to.

Three ways a policy can be built

This is the single most important structural concept in this entire guide, and it is the one almost nobody checks. Every home insurance policy in Canada is built on one of three different foundations, and which one you have changes what "I have coverage" actually means.

The four coverages inside every policy

Regardless of which of the three structures above your policy uses, it is built from the same four coverages bundled into one document.

• Dwelling coverage pays to repair or rebuild the physical structure of your home if it is damaged by a covered peril. This is usually the largest coverage amount on the policy, and it is the number your lender pays closest attention to.
• Contents (personal property) coverage covers your belongings inside the home: furniture, electronics, clothing. It typically extends at a set percentage of your dwelling coverage unless you set it independently.
• Personal liability coverage protects you if someone is injured on your property, or if you are found responsible for damage to someone else's property, and pays your legal defence costs if you are sued. In most policies it covers you as a person, not just your home.
• Additional living expenses (ALE) pays reasonable costs, such as a hotel, meals, or temporary rent, if a covered loss makes your home unliveable while it is repaired. Easy to forget exists until you actually need it, and it only responds if the underlying damage itself was a covered peril.

The full list of what is covered by default

Most homeowners can only name one or two things their policy covers. Under a standard comprehensive or broad form policy, the actual list is longer, and knowing it helps you spot the gaps that are not on it.

• Fire, lightning, and smoke. The original reason home insurance exists, and still the most universally covered peril across every policy type.
• Theft and vandalism. Covers your belongings if they are stolen, and damage caused by vandalism or malicious mischief to your home.
• Wind, hail, and weather events. Damage from windstorms and hailstorms is generally included. This is separate from overland flooding. Wind damage and flood damage are treated completely differently.
• Sudden and accidental water discharge. A burst pipe, a failed appliance hose. Covered by default. The water section below breaks down exactly where this default coverage ends.
• Explosion and falling objects. Damage from an explosion, or from something falling onto your home, like a tree branch during a storm.
• Liability claims. If a guest is injured on your property, or your dog damages a neighbour's fence, your liability coverage responds, including your legal defence costs.

None of this involves water. It is worth knowing the full list, because it is easy to assume "insurance" means "water," when water is actually one entry on a much longer list.

Water damage: the one peril that is actually three

Water damage is now the most common and most expensive kind of home insurance claim in Ontario, and it is also the peril homeowners misunderstand the most. Two homes can flood on the same street during the same storm, and one claim gets paid while the other gets denied, not because of luck, but because the water took a different path into the house.

• Sudden and accidental discharge. A pipe suddenly bursts, a washing machine hose fails, a water heater ruptures. This is the type of water damage that is commonly included by default, under both broad form and comprehensive policies, because it is sudden, internal, and not something you could have reasonably prevented.
• Sewer backup. Water or sewage backs up into your home through a drain, floor drain, toilet, or sump system, usually because a municipal sewer or your own line is overwhelmed. This is a major issue in dense, older parts of the GTA, and it is typically not included by default. It has to be added as a separate endorsement.
• Overland flooding. Water enters from outside, at ground level, from heavy rainfall, rapid snowmelt, or a nearby river or lake overflowing. Overland flood coverage only became available as a purchasable add-on in Ontario after 2015, and even now it is optional and usually has to be selected deliberately. Most standard policies still exclude it.

Seeing the word "water" in your policy does not mean every way water enters your home is treated the same.

The exclusions almost every policy shares

Beyond the water-specific gaps above, there is a broader set of exclusions that show up across nearly every home insurance policy in Canada, regardless of insurer or structure.

• Wear and tear and gradual deterioration. Insurance covers sudden, accidental loss, not the ordinary aging of your home. A roof that finally fails after 25 years of use is a maintenance issue, not a claim.
• Infestation. Damage from insects, rodents, or mould that develops gradually is generally excluded, on the same logic as wear and tear.
• Vacancy. Most policies restrict or void coverage if a property sits unoccupied for an extended period, commonly around 30 consecutive days. This catches more people than any other exclusion on this list.
• Business use. Running a business out of your home beyond incidental use can void coverage for anything related to that business activity, and may require a separate endorsement or commercial policy.
• War, nuclear hazard, and earthquake. Standard policies exclude these outright. Earthquake coverage exists as a separate optional endorsement in higher-risk regions of Canada, though it is less commonly purchased in Ontario than in British Columbia.

Replacement cost versus actual cash value

This one line in your policy can matter more than your deductible, and most homeowners never actually check which one they have.

Construction costs in Canada have risen far faster than general inflation since 2019. A policy limit set a few years ago may already be short of what it actually costs to rebuild today.

What actually determines your premium

Two homes of identical size and value, three streets apart, can carry noticeably different premiums, or one can be declined by standard insurers entirely while the other qualifies easily. The difference almost always comes down to the same handful of underwriting factors, and several of them are the exact same items your home inspector already flags.

• Electrical wiring. Knob and tube wiring, common in homes built before roughly 1950, has no ground wire and is considered a serious fire risk. Many standard insurers will not cover a home with active knob and tube at all. Aluminum wiring, common in homes built between the 1960s and late 1970s, is also flagged by most insurers and often requires an inspection or certified upgrade before full coverage is offered.
• Plumbing material. Galvanized steel or lead pipes, common in pre-1960s homes, corrode from the inside and are prone to bursting. Homes with copper or modern PEX plumbing generally receive better rates.
• Roof age. A roof older than about 20 years increases premiums, and some insurers will only pay actual cash value, not full replacement cost, on a roof nearing the end of its expected life.
• Heating sources. A wood-burning stove or fireplace insert typically needs a WETT (Wood Energy Technology Transfer) inspection certificate before an insurer will cover it. An older oil tank can also affect insurability on its own.
• Claims history. Both your personal claims history and, in some cases, the property's prior claims history factor into your premium and even whether an insurer will offer coverage at all.
• Location. Postal code level flood and crime risk, proximity to a fire hydrant and fire hall, and regional weather patterns all factor into pricing before anything about the specific house is considered.

Deductibles and coverage limits

Two more details decide what actually lands in your bank account after a claim, and both are easy to miss when you are just glancing at the premium.

• Your deductible is the amount you pay before insurance pays anything. A single policy can carry different deductibles for different perils. Your base deductible might be one number, while a water endorsement carries its own, often higher, deductible.
• Your coverage limit is the maximum the insurer will pay for that peril. Sewer backup and overland flood endorsements are almost always capped well below your full dwelling coverage, sometimes as low as a specific dollar amount you choose when you add the endorsement, commonly ranging from the low tens of thousands upward depending on the insurer.

A few practical moves can also reduce your risk and, sometimes, your premium: installing a backwater valve to stop municipal sewage from flowing back into your home, extending downspouts away from the foundation, maintaining eavestroughs, and installing window well covers on below grade basement windows. Ask your broker whether any of these qualify for a discount on your policy specifically.

If you own a condo, two policies, one gap

If you are buying a condo, your unit is actually protected by two separate insurance policies, and the space between them is where condo owners get genuinely expensive surprises.

• What the corporation's policy covers: the building structure, shared systems like elevators and HVAC, common areas, and the unit as originally built by the developer.
• What your own policy needs to cover: your personal belongings, any upgrades or renovations beyond the original standard unit (sometimes called improvements and betterments), and your personal liability.
• Loss assessment coverage: a specific add-on that pays your share if the condo corporation bills owners for a shortfall, most importantly, the corporation's own deductible if a claim is traced back to your unit.

Renting, vacant, and other special cases

A standard home insurance policy is written for one specific situation: an owner living in their own home. The moment that changes, tenants move in, the property sits empty, you start operating it commercially, the standard policy can stop responding to claims entirely, and in some cases the insurer can cancel it outright once they find out.

Renting out all or part of your property

• Loss of rental income, covering your lost rent if a covered event makes the unit uninhabitable during repairs. Home insurance has no equivalent to this.
• Tenant-related risks, like intentional tenant damage or the higher liability exposure of having a non-owner occupant, which standard policies are not priced for.
• What it still does not cover: your tenant's own belongings and personal liability. That is the tenant's responsibility, through their own tenant insurance policy, not yours.

This applies even to partial rentals, renting out a legal basement apartment while you live upstairs. You need to disclose that to your insurer. Undisclosed rental use is one of the more common reasons a claim gets denied after the fact.

The vacancy clause

What your lender requires before closing

Home insurance is not legally mandatory in Ontario the way car insurance is. In practice, it is unavoidable, because your mortgage lender will not release your mortgage funds without proof of it.

• Proof of insurance, usually a binder or confirmation letter from your insurer, needs to be in your lawyer's hands before closing. Your lender is named as the "first loss payee" on the policy, meaning if there is ever a major claim, the payout is directed to protect their loan first.
• Coverage amount generally needs to be enough to fully rebuild the home, not just match your purchase price or mortgage amount. Lenders will flag a policy that looks underinsured relative to the property, which connects directly back to the replacement cost discussion above.
• Timing matters. Arrange your policy at least a week before closing, not the morning of. A binder that has not been finalized can hold up funding on a day where everything else is already in motion. And if the underwriting factors above, older wiring, plumbing, an aging roof, apply to the home you are buying, get that quote during your conditional period, when there is still time to act on what it tells you.

This is the same reason "line up home insurance" shows up on every closing checklist. It is not paperwork for its own sake, it is the condition your lender attaches to releasing your money.

Questions to ask your broker

Copy these into an email or bring them to your next call, whether you are buying, renewing, or just reviewing what you already have. A good broker will walk through every one of these with you.

• Is my policy named perils, broad form, or comprehensive, for both dwelling and contents?
• Do I have sewer backup coverage, and what is the limit and deductible on it specifically?
• Do I have overland flood coverage, and what is the limit and deductible on it specifically?
• Is my dwelling coverage on a replacement cost basis? Is my contents coverage?
• When was my dwelling coverage amount last reassessed against current construction costs?
• Does this property's wiring, plumbing, or roof age affect my premium or eligibility?
• Do I qualify for a discount if I install a backwater valve or sump pump?
• (Condo) What is the corporation's current master policy deductible, and does my loss assessment coverage match or exceed it?
• (Landlord) Do I need to switch to a landlord policy, and does it include loss of rental income?
• What specifically is excluded from my policy that I might assume is covered?

Glossary

Every term in this guide that can sound intimidating, in everyday language.

• Named perils policy. A policy that only covers events specifically listed in the contract. If a loss does not match the list, it is not covered.
• Broad form policy. All-risk coverage for the physical structure of your home, but only named-perils coverage for your contents.
• Comprehensive (all-risk) policy. Covers both dwelling and contents against any cause of loss not specifically excluded. The most common policy type in Canada.
• Dwelling coverage. The part of your policy that pays to repair or rebuild the physical structure of your home.
• Contents (personal property) coverage. The part of your policy that covers your belongings inside the home.
• Personal liability coverage. Protects you if someone is injured on your property or you are found responsible for damage to someone else's property.
• Additional living expenses (ALE). Pays reasonable temporary living costs if a covered loss makes your home unliveable during repairs.
• Sudden and accidental discharge. Water damage from an unexpected, one-time event like a burst pipe. Typically covered by default.
• Sewer backup. Water or sewage entering your home through a drain, toilet, or sump system. Typically requires a separate endorsement.
• Overland flooding. Water entering your home from outside at ground level. An optional endorsement, only available in Ontario since 2015.
• Endorsement. An add-on to a standard policy that extends coverage to something not automatically included.
• Actual cash value (ACV). A payout method that pays what a damaged item or structure is worth today, after depreciation.
• Replacement cost value (RCV). A payout method that pays what it costs to replace or rebuild at today's prices, with no deduction for depreciation.
• Guaranteed or extended replacement cost. An upgrade that pays to fully rebuild your home even if the cost exceeds your stated policy limit.
• Deductible. The amount you pay out of pocket before your insurance coverage pays the rest of a claim.
• Coverage limit. The maximum amount an insurer will pay for a specific peril or endorsement.
• Underwriting. The process an insurer uses to assess risk, wiring, plumbing, roof age, claims history, location, and decide whether to offer coverage and at what price.
• Knob and tube wiring. An early electrical wiring system with no ground wire, common in pre-1950s homes and considered high fire risk by insurers.
• WETT certificate. An inspection certificate for wood-burning stoves and fireplace inserts, often required before an insurer will cover a home with one.
• Backwater valve. A mechanical device installed on your wastewater line that prevents municipal sewage from flowing back into your home during a sewer backup.
• Master policy (condo). The condo corporation's insurance policy, covering the building, common areas, and the standard unit as originally built.
• Standard unit. The definition, set by each condo corporation, of what a unit included when originally built. Varies by building.
• Improvements and betterments. Upgrades or renovations made beyond a condo's original standard unit, generally not covered by the corporation's master policy.
• Loss assessment coverage. A condo owner's add-on that covers a share the corporation bills back to owners, most often the corporation's own insurance deductible.
• Chargeback. When a condo corporation bills an individual owner for repair costs or its insurance deductible after damage is traced to that owner's unit.
• Landlord (rental property) insurance. A separate insurance product for tenant-occupied properties, covering risks and loss of rental income that home insurance does not.
• Vacancy clause. A provision restricting or voiding coverage once a property sits unoccupied beyond a set period, commonly around 30 days.
• First loss payee. The party, typically your mortgage lender, named on your policy to receive claim payouts first in the event of a major loss, protecting their loan.