Is replacing a water heater every 10 years mandatory in Quebec?

No. No Quebec statute requires replacing a water heater every 10 years, and the Civil Code of Quebec contains no provision at all on the age of water heaters. The "10-year rule" comes from two contractual sources: home insurance policies, many of which carry a rider excluding or limiting water damage caused by a water heater more than 10 to 12 years old, and, in many buildings, the declaration of co-ownership or the building bylaws. Those sources still bind the co-owner: "not required by statute" does not mean "without consequence".

Where does the 10-year rule actually come from?

From three sources, none of which is a statute. First, home insurers active in Quebec (Desjardins, Intact, Beneva, La Capitale, Promutuel, Wawanesa) apply a rider excluding water damage caused by a water heater more than 10 to 12 years old, impose a higher deductible, or require replacement as a condition of coverage. Second, the declaration of co-ownership frequently imposes replacement at a fixed interval, a drip pan, or a declaration of the install date to the syndicate. Third, prevention best practice: the Insurance Bureau of Canada recommends preventive replacement around 10 to 12 years, because internal tank corrosion is generally not visible before the leak.

My water heater is less than 10 years old. Am I protected if it causes water damage?

No, not since Syndicat des copropriétaires du Condominium Club Marin II c. Andrade, 2026 QCCQ 3004, decided on July 7, 2026. The ten-year deadline set out in the declaration of co-ownership had not expired, and the court expressly found the defendants had breached no obligation on that point, yet it still ordered them to pay $76,231.11 to their syndicate. The reason: the co-owner had seen water in the drip pan, attributed it to condensation, and had the appliance neither inspected nor replaced. For the court, that water was in itself a sign that could not be ignored. The replacement date is a floor, not a shield.

Can the syndicate claim its insurance deductible from me after water damage that started in my unit?

Yes, under certain conditions. Article 1074.2 of the Civil Code of Quebec provides that sums spent by the syndicate to pay deductibles and repair the damage may not be recovered from co-owners other than through common expenses, subject to damages against the co-owner whose fault caused the loss and, in the cases provided for in the Code, damage caused by the act of property under their custody. A water heater in a private portion is property under the co-owner's custody, which lets the syndicate rely on article 1465 CCQ and its presumption of fault against the custodian. The co-owner can rebut it only by showing they exercised sustained vigilance in verifying the good condition of the appliance.

Can my declaration of co-ownership make me automatically liable for a loss originating in my unit?

No. Article 1074.2 CCQ is mandatory law: any stipulation departing from its first paragraph is deemed unwritten. A declaration of co-ownership therefore cannot provide that the owner of the water heater behind a loss is always liable regardless of circumstances, and liability never flows from the mere origin of the loss. The declaration does remain useful for defining obligations: in Club Marin II the court confirms that a syndicate may validly impose mandatory replacement of the water heater at a set frequency. Those obligations then serve to assess fault.

Is the water heater a common portion or a private portion?

In the vast majority of declarations of co-ownership, a water heater serving a single unit is a private portion and therefore the co-owner's responsibility, not the syndicate's. You should still check your own declaration, since it is the document that delimits the common and private portions of the building.

Replacing your water heater every 10 years: is it actually mandatory in a Quebec condo?

Quick answer: no. No Quebec law requires replacing a water heater every 10 years. The "10-year rule" comes from two contractual sources: home insurance policies (riders that exclude or limit water damage caused by a heater older than 10 to 12 years) and, in many buildings, the declaration of co-ownership or building by-laws. But "not mandatory" does not mean "without consequences" (see art. 1074.2 CCQ).

And since July 2026, an essential clarification: meeting the 10-year deadline in your declaration does not protect you. In Club Marin II (2026), co-owners whose water heater had not yet reached the replacement deadline were still ordered to pay their syndicate over $76,000, because they had ignored a visible sign of a leak. See the section on that decision.

Where does the "10-year rule" come from?

Three distinct sources — none of them is a law:

1. Home insurers. Several insurers active in Quebec (Desjardins, Intact, Beneva, La Capitale, Promutuel, Wawanesa) apply a rider that excludes water damage caused by a water heater older than 10 to 12 years, imposes a higher deductible, or requires replacement as a condition of coverage. This is a contractual clause in your policy — not a legal obligation. The industry has tightened these clauses over the years as water damage became the leading cause of condo claims.

2. The declaration of co-ownership. Many declarations and building by-laws impose prevention measures on co-owners for their private portion: replacing the water heater on a fixed schedule, a drip pan, declaring the installation date to the syndicate. These clauses are binding on co-owners — check yours before concluding that nothing requires it.

3. Best practice. The Insurance Bureau of Canada and prevention professionals recommend preventive replacement around 10 to 12 years, because internal tank corrosion is generally invisible until the leak happens.

What the law actually says

The Civil Code of Québec contains no provision about water heater age. However, three articles govern what happens when a heater fails:

The syndicate's deductible can land on you. The syndicate insures the building (art. 1073 CCQ), but water-damage deductibles are often high. Article 1074.2 CCQ provides that amounts the syndicate spends on deductibles and repairing the damage can only be recovered from co-owners through common expenses — subject to damages against the co-owner whose fault caused the loss and, in the cases provided by the Code, the injury caused by property in their custody. A water heater in your private portion is property in your custody: if its failure causes a loss, the syndicate may seek to recover the cost from you. The Court of Québec set out the conditions of that liability in 2026 (see below).

Your liability insurance is mandatory. Since the 2018 reform, every co-owner must carry civil liability insurance with a minimum amount set by regulation (art. 1064.1 CCQ). That policy is precisely what responds when your water heater damages common portions or neighbouring units — hence the importance of checking what your water-heater rider excludes.

The self-insurance fund absorbs deductibles. The syndicate must maintain a self-insurance fund (art. 1071.1 CCQ) intended in particular to pay deductibles. Every avoided water-heater loss protects that fund, which all co-owners finance.

What the Club Marin II decision (2026) changes

On 7 July 2026, in Syndicat des copropriétaires du Condominium Club Marin II c. Andrade, 2026 QCCQ 3004 (Court of Québec, Huppé J.C.Q.), the court delivered the most detailed analysis to date of a co-owner's liability when a loss originates in their private portion. The case was about a water heater.

The decision is written in French; the passages below are our own translation, with the French wording given where it matters.

The facts. In March 2022, a director noticed water lifting the wallpaper on the 14th floor. The source was a water heater on the 16th floor. Nine private portions and common portions were damaged. Because the cost came in below the syndicate's deductible, the syndicate could not claim on its insurance at all: it had to pay for the repairs itself, then sue the co-owners. The court ordered them to pay $76,231.11, being $48,556.13 in emergency and restoration work and $27,674.98 in legal fees claimed under a clause of the declaration.

Meeting the 10-year deadline is not enough

This is the key point for this article, and it runs against what many co-owners assume.

The declaration did require replacing the water heater every 10 years, and that deadline had not expired when the loss occurred. The court says so explicitly: whichever date you use, the ten-year period "was not yet expired at the time the loss was discovered. The defendants committed no breach in relation to that obligation."

They were held liable anyway, because the same declaration also required them to ensure the appliance was in good condition. The co-owner had seen water in the drip pan, put it down to condensation, and had the heater neither inspected nor replaced. For the court, water in the drip pan "was in itself a sign that the water heater might have a problem", a sign that "could not be ignored", especially with only a few months left before the ten-year mark.

In short: the replacement date is a floor, not a shield.

The burden of proof has shifted

Before 2020, the syndicate generally had to prove personal fault by the co-owner, which was very hard: a syndicate has no way of knowing how each co-owner maintains their appliances.

The amendment to art. 1074.2 CCQ added injury "caused by the act of property in their custody". The court explains that this lets the syndicate rely on article 1465 CCQ:

The custodian of a thing is bound to make reparation for injury resulting from the autonomous act of the thing, unless he proves that he is not at fault.

That provision creates a presumption of fault against the custodian. Once the damage is shown to result from the autonomous act of the thing, it falls to the co-owner to prove absence of fault. In divided co-ownership the court sets the standard: to rebut the presumption, the co-owner must show they exercised "sustained vigilance" (« une vigilance soutenue ») in checking the condition of that property.

Your declaration cannot create automatic liability

The judgment stresses that art. 1074.2 CCQ is imperative: any stipulation departing from the first paragraph "is deemed unwritten" (« réputée non écrite »).

In practice, a declaration of co-ownership cannot provide that the owner of a water heater behind a loss is always liable, whatever the circumstances. Liability never follows from the mere origin of the loss.

That said, and this matters for boards, the declaration remains fully effective to define obligations. The court confirms a syndicate may validly require "mandatory replacement of the water heater at a set frequency". Those obligations then feed the assessment of fault. The declaration does not set the liability standard, but it does set what is expected of the co-owner.

In practice for your syndicate

Co-owner: check your heater's installation date (nameplate), your insurance policy (rider, exclusion, deductible) and your declaration of co-ownership. Keep the installation invoice.
Co-owner, at the first sign: water in the drip pan, damp, rust at the base of the tank, a mark on the floor. Have the appliance checked and keep proof of the check. That is exactly what was missing in Club Marin II, and it is what lets you rebut the art. 1465 CCQ presumption. Look behind and beside the tank too, not just the front.
Board of directors: keep a register of installation dates per unit. Many syndicates require proof of replacement on schedule — a prevention measure set out in the declaration or adopted by by-law, not a legal requirement.
Board of directors, worth re-reading: if your declaration makes the co-owner automatically liable for a loss originating in their unit, that clause is deemed unwritten. A clause imposing verifiable prevention measures (replacement on schedule, drip pan, proof of maintenance) is by contrast entirely valid and useful.
When selling a unit: an end-of-life water heater is one of the items a diligent buyer (and their inspector) systematically checks.

CondoAide's Obligations module lets the syndicate collect proof of installation, track water-heater age per unit and send automatic reminders — according to the rules your syndicate sets in its declaration or by-laws.

What is NOT in the law

❌ "Quebec requires replacing the water heater every 10 years" — false, no legal provision exists.
❌ "My insurer can't deny a water-damage claim because of the heater's age" — false, the exclusion rider is a valid contractual clause; read your policy.
❌ "The syndicate always pays the deductible" — incomplete: art. 1074.2 lets the syndicate claim against the co-owner at fault or having custody of the property in question.
❌ "My water heater is less than 10 years old, so I'm safe" — false since Club Marin II (2026): meeting the replacement deadline does not displace the duty to monitor the appliance's condition and act as soon as a sign appears.
❌ "My declaration says the water heater's owner always pays, so that settles it" — false: such a clause is deemed unwritten, because art. 1074.2 CCQ is imperative.
❌ "The water heater is a common portion" — in the vast majority of declarations, a heater serving a single unit is in the private portion and is the co-owner's responsibility.