Poly-B in your condo or townhouse: a guide for owners and boards
Maybe you're a unit owner who just found Poly-B behind your bathroom vanity and want to know what to do next. Or maybe you're a board member or property manager looking at a building full of it, wondering how a project like this even gets started. Both questions land here for the same reason — Poly-B in a multi-unit building is a different problem than Poly-B in a single-family home, and it usually needs a different plan.
Why multi-unit buildings are a different challenge
In a single-family home, Poly-B replacement is mostly a scheduling and access question inside one property. In a condo or townhouse building, it's that plus a lot more, because the plumbing itself is shared in ways a detached home's isn't.
Many Calgary condo and townhouse buildings from the Poly-B era (roughly 1978 to 1995) run vertical risers and shared supply lines through multiple units — a single riser might feed several suites stacked on top of each other. That means a fitting failure isn't always contained to one unit. It's a big part of why boards end up dealing with Poly-B reactively: a failure in one unit sends water into the unit below, and suddenly what looked like a "someday" problem is a claim, a remediation crew, and an urgent board meeting.
There's also the coordination side. Replacing pipe in a single house means scheduling around one household. Replacing it building-wide means scheduling around dozens of owners, tenants, and access windows — which is exactly why these projects tend to move in phases rather than all at once.
How a building-wide project typically unfolds
Every building is different, and your board or property manager will confirm the specifics that apply to your bylaws and reserve fund. But most Poly-B repipe projects in Calgary condos and townhouses follow a similar general shape:
- Initial assessment and scope report. A plumber walks common areas, mechanical rooms, and a sample of units to document where Poly-B exists, how it's configured, and what risk areas stand out. This becomes the reference document the board uses to start the conversation.
- Budget and reserve-fund discussion. With a scope and rough cost picture in hand, the board typically works through how the project gets funded — whether that draws on the reserve fund, requires a special assessment, or some combination. This is a board and condo-lawyer conversation more than a plumbing one, and the right approach depends on your specific bylaws.
- Owner communication and scheduling. Once a project is approved, owners generally get advance notice of timelines and what access will be needed in their unit — this is usually where a property manager coordinates directly with residents.
- Phased execution. Rather than opening every unit at once, work is usually done riser-by-riser, floor-by-floor, or by building section. This limits how many owners are disrupted at any given time and lets the crew work efficiently through a repeatable process.
Two starting points, one page
For boards & property managers
If you're looking at a building with known or suspected Poly-B, the first useful step is usually a written assessment — something concrete you can bring to the board table instead of a verbal impression. We can walk common areas and a sample of units and put together a scope report you can use in budget planning.
For individual owners
If your board hasn't approved a building-wide project yet — or you're not sure it's even on their radar — you don't necessarily have to wait. Getting your own unit assessed and quoted gives you a clear picture of your own risk, and a professional report is also useful documentation if you want to raise the issue with your board or property manager.
The condo insurance angle
Poly-B risk touches insurance on both sides of a condo relationship. A condo corporation's master policy can be affected by Poly-B exposure across the building, and an individual owner's own policy can be affected too — coverage terms and pricing vary by insurer and aren't something we can speak to directly. It's worth both the board and individual owners checking in with their respective insurers to understand where they stand. For more on how Poly-B and home insurance interact in Alberta generally, see our Poly-B home insurance guide.
What this means for your budget and timeline
- A written scope report turns a vague risk into a plannable project — boards can budget against real numbers instead of guessing, and owners have documentation to bring to a board meeting.
- Phased execution limits disruption — working riser-by-riser or section-by-section means most owners in the building aren't dealing with active construction at the same time.
- Getting your own unit done early protects you regardless of building timing — you're not left waiting on a building-wide vote to reduce your own leak risk.
- Clear documentation supports insurance conversations — both boards and owners are in a stronger position with their insurer when they can show a plan or completed work, rather than an open question mark.
For a sense of what an individual unit or a larger project might cost, see our Poly-B replacement cost guide, and for a walkthrough of what happens on-site once work is scheduled, see what to expect during the replacement process.
Condo & townhouse Poly-B FAQ
Who pays for Poly-B replacement in a condo — the corporation or the owner?
It genuinely depends on your building's bylaws and how they classify the pipe in question — some define shared risers and main lines as common property (corporation-funded) and in-unit branch lines as the owner's responsibility, but every building draws that line a little differently. We're not condo lawyers, so we always tell owners and boards to confirm the specifics with your board, property manager, or condo lawyer before assuming who's on the hook.
How long does a building-wide repipe take?
It depends heavily on the size of the building and how it's phased, but most Calgary condo and townhouse projects run from a few weeks to a few months when done riser-by-riser or section-by-section, since crews aren't in every unit at once. A single townhouse unit is usually done in a day or two, similar to a single-family home.
Can I replace just my own unit if the board hasn't approved a building project?
In many buildings, yes — owners can often get their own in-unit Poly-B assessed and replaced without waiting on a building-wide vote, though this depends on your bylaws and what counts as common versus unit property. It's worth checking with your property manager first, but plenty of owners move ahead on their own unit while the bigger building conversation is still happening.
Do you provide assessment reports for condo boards?
Yes. We can walk a building, document where Poly-B is present, note condition and risk areas, and put together a written scope report a board can use in budget and reserve-fund discussions. It's the same kind of documentation an individual owner can also request for their own unit.
Does Poly-B affect condo insurance?
It can, on both sides. Some insurers factor Poly-B into pricing or coverage terms for a condo corporation's master policy, and individual owner policies can be affected too. It's worth both the board and individual owners checking directly with their own insurers rather than assuming coverage either way.
Whether it's one unit or the whole building, let's start with a real assessment
Board member, property manager, or individual owner — get a written report you can actually use, whether that's for your own peace of mind or your next board meeting.
Request Your Assessment