The decking material question is one of the first decisions homeowners face when planning a new deck, and it is one where the initial cost comparison can be misleading. Pressure-treated pine is cheaper per square foot at the lumber yard. Composite decking costs more upfront. But the ten-year picture looks different, and for most homeowners in Ontario's climate, the comparison is worth doing carefully.

Pressure-treated pine: the honest picture

Pressure-treated pine is the most common decking material in Ontario and for good reason. It is widely available, easy to work with, and the least expensive option at the material stage. A typical deck built with pressure-treated pine will cost 30 to 40 percent less in materials than the same deck built with composite. The trade-offs: it needs to be stained or sealed every two to three years to prevent checking and graying. It will develop surface checks (small cracks along the grain) within the first year as it dries. And it has a finite lifespan, typically 15 to 20 years with proper maintenance.

Composite decking: what you are actually buying

Composite decking, the products we use most often are Trex Transcend and TimberTech Azek, is a manufactured product made from a combination of wood fibre and plastic. It does not rot, does not check, does not need to be stained, and does not splinter. The surface texture is consistent and the colour is stable. Most composite products carry a 25-year warranty against fading and staining. The upfront cost is higher, typically 60 to 80 percent more in materials than pressure-treated pine, but the maintenance cost over ten years is close to zero.

Cedar: the middle option

Western red cedar is a natural wood that sits between pressure-treated pine and composite in both cost and performance. It is naturally resistant to rot and insects, it does not require chemical treatment, and it has a warmth and grain variation that composite cannot replicate. It still needs periodic sealing, though less aggressively than pine. Cedar is a good choice for homeowners who want a natural wood aesthetic and are willing to do some maintenance to keep it.

Climate considerations in Ontario

Ontario's freeze-thaw cycle is hard on decking materials. Water that gets into surface checks in wood decking expands when it freezes and accelerates the checking. Composite materials are largely unaffected by freeze-thaw cycling. For decks that will be exposed to standing water, such as those without adequate slope or drainage, composite is the more durable choice.

What we typically recommend

For homeowners who plan to stay in the house for ten or more years and want minimal maintenance, composite is usually the right choice. For homeowners with a tighter budget who are comfortable with periodic maintenance, pressure-treated pine is a perfectly good material. Cedar is worth considering when the natural wood aesthetic is a priority. We are happy to build with any of these materials and will give you an honest cost comparison for your specific project.

The right decking material depends on your budget, your maintenance tolerance, and how long you plan to stay in the house. We are happy to walk through the numbers with you on a site visit.