In a detached house, Poly B is one owner's problem and one owner's decision. In a condominium or townhouse it is neither, and that changes almost everything about how it gets dealt with.
The governing documents decide the answers here, so nothing on this page substitutes for reading the bylaws and the insurance certificate for a specific building.
Who owns the pipe
The usual division in Alberta condominium documents makes the corporation responsible for common property, including pipe running through structure and between units, while the unit owner is responsible for what serves their unit alone from a branch point inward.
Where that branch point sits is defined by the bylaws, not by common sense, and buildings differ. This one question determines who pays for a repipe and who pays for water damage, so it is worth establishing in writing before any other decision.
Whose insurance responds
| Situation | Usually responds | Watch for |
|---|---|---|
| Water escapes in-unit, damages that unit | The unit owner's policy | The corporation's deductible may still be charged back |
| Water escapes in-unit, damages units below | The corporation's policy, then a chargeback | Chargebacks can run into five figures |
| Failure in a common property pipe | The corporation's policy | A special assessment where it is not covered |
| Building-wide replacement programme | The corporation, from reserve or assessment | Whether an owner can opt out, which is usually no |
The deductible chargeback is the part that surprises people. A corporation policy with a high water damage deductible can leave the owner whose unit the water came from carrying most of a claim, even though the corporation's policy responded.
It is also why a corporation with Poly B faces the same insurance pressure a homeowner does, only larger, and why building-wide replacement programmes exist at all.
Board approval and scheduling
Work touching common property, or requiring access through a wall shared with another unit, generally needs board approval before it starts. Doing it first and asking afterwards is how an owner ends up restoring a wall twice.
Buildings also impose practical constraints a detached house does not: elevator bookings, permitted working hours, noise windows, crew parking, and shutting off risers that serve neighbours. A repipe that takes four days in a house can take considerably longer in a building purely because of them.
Special assessments and building-wide programmes
Where a corporation decides to replace Poly B across a building, the cost is met from the reserve fund, a special assessment, or both. An owner facing an assessment is usually not able to opt out, and the amount is set by unit factor rather than by whether that particular unit ever leaked.
For a buyer this is the thing to look for in the documents before the condition date: reserve fund study language about supply plumbing, minutes discussing Poly B, and any assessment already voted on. A building that has completed a programme is in a materially better position than one still deciding, and the documents show which it is.
What a unit owner can do alone
- Read the bylaws and the insurance certificate, and establish where responsibility divides
- Ask the property manager, in writing, whether Poly B has been discussed at board level
- Request the reserve fund study and look for supply plumbing
- Establish the corporation policy's water damage deductible, and whether chargebacks apply
- Get in-unit exposure priced, so the number is known before a decision has to be made
- Raise it at an AGM if the building has not addressed it
Almost every specific answer in a condominium comes from that building's own documents. Treat this page as the list of questions rather than the answers.