Duradek’s Ultra 60 mil membrane carries a 15-year waterproofing warranty, and a properly installed vinyl deck in Metro Vancouver routinely stays watertight beyond it. But the honest answer to “how long does Duradek last” is that the vinyl is rarely the part that fails. What ends a vinyl deck’s life in this climate is almost always the plywood and framing underneath, or a detail at the edge that was never done right in the first place.
This is the difference between a deck that gets recovered once in thirty years and a deck that gets torn down at year twelve. Below is what the warranties actually say, what fails first, and how to tell which situation you are in.
Duradek warranty terms, exactly as written
Duradek publishes its warranty terms, so there is no need to guess. As of 2026:
| Product | Waterproofing warranty | Appearance warranty |
|---|---|---|
| Ultra 60 mil (woven backed) | 15 years from installation | Up to 5 years |
| Non-woven backed 60 mil | 10 years | 1 year |
| 45 mil (standard and non-woven) | 5 years | — |
Two details in there matter more than the headline number:
- The warranty is transferable. Duradek states it stays valid for the full term regardless of who owns the property. If you are buying a house with a recent vinyl deck, that coverage comes with it — ask for the paperwork.
- It is not prorated. A failure in year fourteen is treated the same as a failure in year two, rather than paying out a declining fraction.
- It covers the membrane, not the installation. Workmanship is warrantied by the installer, separately, and those terms vary enormously. This is the single most important thing to ask about before you sign anything.
Ultra 60 mil installed before June 2019 sits under the older 10-year coverage, so if your deck is from that era, check the date before you assume 15.
Warranty length is not the same as lifespan
A warranty is the period the manufacturer will replace defective material. It is not a prediction of when the deck stops working. Well-installed vinyl decks in the Lower Mainland commonly run past their warranty term without leaking — and badly installed ones leak in year three, which the warranty will not cover because the membrane was never the problem.
That is why the useful question is not “how long does the vinyl last.” It is what is the vinyl sitting on, and how was the edge finished.
What actually kills a vinyl deck in Metro Vancouver
In order of how often we find it when we open one up:
1. The perimeter detail, not the field
The middle of a vinyl deck is a continuous sheet with heat-welded seams. It is genuinely durable. The failures are at the edges: where the membrane turns up the wall, where it meets a door threshold, where it runs under a railing post, where it terminates at a scupper or drain. If those details were not flashed and tucked correctly, water gets behind the membrane instead of on top of it — and then the membrane is keeping the water in rather than out.
2. Railing posts drilled through the membrane
Every post that goes through a waterproof surface is a hole in the waterproofing. Done right, that penetration is detailed and sealed. Done wrong, it is a funnel pointed straight at your rim joist. This is the most common single point of failure we see on decks over living space, and it is why we treat railings on a waterproofed deck as a structural and waterproofing question, not a style question.
3. The substrate going soft
Vinyl goes over plywood. If water has been getting under the membrane for a few years, the plywood delaminates and the framing starts to rot, and you will feel it before you see it — a soft spot, a bounce, a dip that holds water. At that point the membrane is fine and the deck is not.
4. Slope and drainage
A vinyl deck has to shed water. In this climate that is not optional. Decks built flat, or decks that have sagged into a low spot, hold standing water at every rainfall. Standing water finds seams. Over a Vancouver winter that is a lot of opportunities.
5. Actual physical damage
Dragged planters, barbecue legs, patio furniture with metal feet, and dog claws. Real, but the least serious of the five, because a clean puncture in the field is the one thing that genuinely can be patched.
Tufdek vs Duradek: does the brand decide the lifespan?
Less than people expect. Both are established BC vinyl membrane brands, both offer 15-year manufacturer waterproofing warranties on their premium products, and both perform well when installed properly.
| Duradek | Tufdek | |
|---|---|---|
| Premium waterproofing warranty | 15 years (Ultra 60 mil) | 15 years |
| Prorated? | Non-prorated | — |
| Transferable to new owner | Yes | — |
| Workmanship warranty | Set by each installer | Dealers required to offer minimum 5 years |
The practical takeaway: a premium membrane installed badly leaks long before a mid-range membrane installed well. When you are comparing quotes, the differences that matter are who is doing the perimeter detailing, what happens at the railing posts, and what workmanship warranty is in writing — not which logo is on the roll. We compared the field in more detail in top vinyl decking brands.
Duradek alternatives in Canada
Duradek is not the only option, and it is not always the right one. The realistic alternatives fall into three groups:
- Other vinyl membranes — Tufdek, Dec-Tec, Dek-Master and similar. Same category, same installation logic, competitive warranties. The installer is still the variable.
- Composite or wood decking — a completely different approach. Boards with gaps that let water through to a drainage plane below, rather than a sealed surface. This is the right answer when there is nothing underneath the deck that needs to stay dry. We laid out where each one belongs in Duradek vs composite decking.
- Liquid-applied membranes and torch-on — used more often on roof decks and in commercial work.
The rule of thumb: if there is living space, storage or a garage under the deck, you are building a roof and you want a sealed membrane. If there is only ground under it, boards are usually the better long-term value.
Can a vinyl deck be repaired?
Sometimes, and the distinction is the same one that governs deck repair generally: surface problems are repairable, structural problems are not.
| What you have | Repair or replace |
|---|---|
| Clean puncture in the middle of the field | Patch — same product, heat welded |
| Lifted or opening seam, solid underneath | Re-weld |
| Faded, chalky, but flat and draining | Cosmetic — usually leave it |
| Soft or spongy underfoot | Replace — the substrate is gone |
| Water staining or rot on the ceiling below | Replace — and open it up to see how far it went |
| Standing water that never drains | Rebuild the slope, then re-membrane |
Patching over a soft substrate is the most expensive decision available, because you pay for the repair, the water keeps working, and then you pay for the replacement anyway.
How to check your own vinyl deck
Ten minutes, no tools:
- Walk it barefoot, slowly. You are feeling for soft spots, bounce, and dips. Your feet will find things your eyes will not.
- Check it during rain, or hose it. Water should move to the drains and leave. Anything that sits is a problem.
- Run a fingernail along the seams. They should be fused flat. If you can lift an edge, that is a service call, not an emergency — yet.
- Look at the base of every railing post for lifting, cracking or staining around the penetration.
- Go underneath. Stains, drips, efflorescence on concrete, damp insulation or a musty smell in the space below all mean water is already through.
- Look at the wall where the deck meets the house — staining on the siding below that line means the perimeter detail is leaking.
Getting it done properly in Metro Vancouver
VS Deck & Rail installs and replaces vinyl deck membranes across Metro Vancouver — Vancouver, North Vancouver, West Vancouver, Burnaby, Richmond, Surrey and Delta. On a replacement we open the deck up before quoting, because what the plywood looks like decides the job — and quoting a membrane over a substrate nobody has inspected is how people end up paying twice.
If your deck is showing any of the substrate signals above, get it looked at before the wet season rather than after it. Request a free quote and we will tell you honestly whether you are looking at a patch, a recover, or a rebuild.
Frequently Asked Questions
How long does Duradek last?
Duradek’s Ultra 60 mil woven-backed membrane carries a 15-year waterproofing warranty from the date of installation, and a well-installed, maintained vinyl deck commonly stays watertight well past that. Duradek’s non-woven backed 60 mil carries 10 years and the 45 mil products carry 5. In the Lower Mainland the practical limit is usually set by the plywood and framing underneath rather than by the vinyl on top.
Is the Duradek warranty transferable if I sell the house?
Yes. Duradek states its warranty stays valid for the full term regardless of who owns the property, so it carries to the next owner. Note that the manufacturer warranty covers the membrane itself; workmanship is warrantied separately by whoever installed it, and those terms vary by installer.
What actually makes a vinyl deck fail?
Four things, in roughly this order: a seam or detail that was not welded or flashed properly at installation, water getting in at the perimeter where the deck meets the wall, movement or rot in the plywood substrate underneath, and physical damage — a dropped barbecue leg, a dragged planter, a dog. The sheet vinyl in the middle of the field is almost never the first thing to go.
Tufdek vs Duradek — which is better?
Both are established BC-based vinyl membrane brands and both offer a 15-year manufacturer waterproofing warranty on their premium products. Duradek’s product warranty is non-prorated and transferable. Tufdek requires its dealers to carry a minimum five-year workmanship warranty. For most homeowners the installer matters more than the brand — a premium membrane installed badly will leak long before a mid-range membrane installed well.
Can a vinyl deck be repaired, or does the whole thing have to be redone?
A localised puncture or a lifted seam can often be patched or re-welded by an installer with the same product and the right tools. What cannot be patched is a substrate problem. If the plywood underneath has gone soft, or the deck is holding water because the slope is wrong, the membrane has to come off, the deck has to be rebuilt underneath, and new vinyl goes down. Patching over a soft substrate buys a season and costs you the repair twice.
How do I know if my vinyl deck needs replacing?
Walk it barefoot and slowly. Soft or spongy spots, a bounce that was not there before, water pooling instead of draining, seams you can lift with a fingernail, staining or rot on the ceiling or siding below, and any smell of damp underneath are all substrate signals. A membrane that is simply faded or chalky but flat, welded and draining is cosmetic and can usually be left alone.
