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" — an aging heater that fails can cost its owner dearly, in particular through the syndicate's insurance deductible (art. 1074.2 C.C.Q.).

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 C.C.Q.), but water-damage deductibles are often high. Article 1074.2 C.C.Q. 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 its deductible from you.

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 C.C.Q.). 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 C.C.Q.) intended in particular to pay deductibles. Every avoided water-heater loss protects that fund — which all co-owners finance.

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.
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.
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.
❌ "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.