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Building a Deck in Quebec: 7 Mistakes to Avoid


23 avril 2025

Building a deck or patio is often the type of project we imagine to be fairly straightforward. We already imagine lounge chairs, a BBQ, evenings with friends... But if we cut corners or skip steps, it can quickly become expensive. Here are 7 common mistakes to avoid if you want a solid, durable result, and no unpleasant surprises.


1. Forgetting to check municipal regulations

This isn't the most exciting part, but it's crucial: before hammering the first nail, give your city a call. Many municipalities require a permit to build a deck, even if it's low or small. The rules usually vary from one location to another: maximum height, distance from the property line, type of railing, etc. An oversight at this stage could force you to undo your project or modify it in ways you hadn't planned.


2. Neglecting what's happening beneath your feet

The quality of the soil is the very foundation of your deck. Unevenly leveled, poorly drained, or overly soft ground can compromise the stability of the structure, lead to subsidence, cracks, or promote premature deterioration of the materials. Before purchasing or installing, it's essential to ensure the ground is properly prepared. In some cases, rigorous compaction or the addition of piles may be necessary to ensure the overall durability.


3. Taking materials lightly

Choosing between treated wood, cedar, composite, or PVC isn't just a matter of appearance. It's a choice that will impact the maintenance, weather resistance, and lifespan of your deck. PVC membranes, like those offered by Bestdeck, are perfect if you want something waterproof, durable, and virtually maintenance-free. Once installed, you'll have peace of mind for years to come.


4. Forgetting about water drainage

No one wants a slippery or moldy deck. And yet, that's exactly what happens when water accumulates because you didn't plan for a slope or effective drainage. Water needs to be able to drain naturally. By combining a slight slope with a properly installed waterproof membrane, you can virtually avoid moisture problems.


5. Underestimating what's beneath your surface

What you can't see makes all the difference. The structure of a deck—joists, beams, anchors—often goes unnoticed once the boards are installed. Yet, it's what supports everything else. And in Quebec, with our harsh winters, freeze-thaw cycles, and abundant rainfall, the strength of this framework is non-negotiable.


The result if this work isn't done properly: a deck that moves, creaks with the slightest step, or warps within the second year.


A well-designed structure, well-anchored and adapted to the Quebec climate, is what ensures not only the stability but also the longevity of your project. A good deck shouldn't need to be redone after every winter. It should remain solid, quiet... and pleasant to use for years to come.

6. Not thinking about maintenance from the start

Treated wood, for example, ages, cracks, and turns gray. It can be beautiful if you like the rustic look... but it requires time and a lot of work. If you don't want to sand, oil, or repaint every summer, opt for a material like PVC membrane from the start. At Bestdeck, we offer solutions that can be washed with a garden hose and remain beautiful effortlessly.


7. Thinking you can do everything yourself

It's tempting to try to save money by doing everything yourself. It's sometimes possible, but certain steps—like installing a PVC membrane—require specific knowledge and skills. If done incorrectly, water will seep in, the structure will absorb moisture, and repairs could be expensive. Our advice: call a certified installer. Bestdeck can recommend one near you.

Also, don't hesitate to contact construction and renovation professionals to design the structure of your deck.


In summary

A beautiful deck isn't just about wood or composite; it's about a well-thought-out, well-executed project, with the right materials and the right approach. Avoid these beginner's mistakes, and you'll have an outdoor space that lasts for years—without the headaches.


Do you have a project in mind? Need help choosing the right products? Contact us today to get a quote and be connected with a qualified installer in your area. You can also complete this free and quick online quote request.

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