Composite vs Wood DeckingWhich Is Better?
A comprehensive comparison of composite and wood decking materials to help you choose the right option for your budget, Canadian climate, and lifestyle.
Quick Answer
Choose composite decking if you want minimal maintenance, 25–50 year lifespan, and consistent appearance over time. Choose wood (pressure-treated or cedar) if upfront budget is your primary concern, you enjoy the natural look and feel of real wood, and you are willing to maintain it annually. Composite costs 2–4x more upfront but saves money over 20+ years when you factor in staining, sealing, and replacement costs for wood. In Canada’s harsh winters, composite’s resistance to freeze-thaw damage is a significant advantage.
What Is Composite Decking?
Composite decking is an engineered building material made from a combination of wood fibres (sawdust, wood flour) and plastic polymers (typically polyethylene or polypropylene). The wood fibres provide structural rigidity and a natural appearance, while the plastic component delivers moisture resistance and durability. Most modern composite boards feature a protective polymer cap (shell) on all four sides that resists staining, fading, mould, and scratching.
Major composite decking brands available in Canada include Trex (the market leader, using 95% recycled materials), TimberTech/AZEK (offering both composite and PVC options), Fiberon, Deckorators, and MoistureShield. Prices range from $6 to $16 CAD per linear foot for the boards alone, with most homeowners choosing mid-range products at $8 to $11 CAD per linear foot. Composite boards are typically available in 12, 16, and 20-foot lengths and 5.5-inch (140 mm) or 7.25-inch (184 mm) widths.
What Is Wood Decking?
Wood decking uses natural lumber boards as the deck surface. The three most common wood species for decking in Canada are pressure-treated SPF (Spruce-Pine-Fir, the most affordable and widely available), western red cedar from British Columbia (naturally rot-resistant with a warm tone), and tropical hardwoods like ipe, cumaru, and tigerwood (the most durable but most expensive). Pressure-treated SPF accounts for roughly 75% of all wood decks built in Canada.
Pressure-treated deck boards cost $2.00 to $4.00 CAD per linear foot, making them the most budget-friendly decking option. Western red cedar ranges from $4.00 to $7.00 CAD per linear foot, while tropical hardwoods run $7.00 to $16.00 CAD per linear foot. Wood deck boards are available in 8, 10, 12, 16, and 20-foot lengths. The standard deck board is a 5/4x6 (actual 25 mm thick by 140 mm wide), which provides good stiffness and comfort underfoot.
Composite vs Wood: Side-by-Side Comparison
How the two materials stack up across every important category.
| Category | Composite Decking | Wood Decking |
|---|---|---|
| Upfront Cost (per sq ft) | $11–$30 CAD installed | $6–$16 CAD installed |
| Lifespan | 25–50 years | 10–30 years (varies by species) |
| Annual Maintenance | Soap and water wash | Stain/seal every 1–2 years |
| Maintenance Cost (20 yr) | $0–$300 CAD total | $3,000–$7,000 CAD total |
| Appearance | Consistent, manufactured look | Natural grain, ages to grey |
| Heat Retention | Gets very hot in sun | Stays cooler underfoot |
| Scratch Resistance | Good (capped products) | Varies by species |
| Fade Resistance | Excellent (25-yr warranty) | Greys without maintenance |
| Freeze-Thaw Resistance | Excellent — no water absorption | Good if sealed; splits if neglected |
| DIY Difficulty | Moderate (special fasteners) | Easy (standard screws) |
Cost Comparison: The Full Picture
The upfront price difference between composite and wood is significant, but the total cost of ownership over the deck’s lifetime tells a different story.
For a typical 3.7×4.9 m (12x16 ft) deck (18 m² / 192 sq ft), pressure-treated wood decking material costs $900 to $1,400 CAD for the boards alone. The same deck in mid-range composite (Trex Select or TimberTech Edge) costs $2,200 to $3,500 CAD for boards. Including the substructure, fasteners, and installation labour, the total installed cost is approximately $4,500 to $7,500 CAD for wood and $8,000 to $13,000 CAD for composite.
However, wood decks require annual maintenance. Staining and sealing a 18 m² deck costs $200 to $550 CAD per year in materials (quality exterior stain plus application supplies). Over 20 years, that is $4,000 to $11,000 CAD in maintenance costs alone. A pressure-treated deck also typically needs board replacement after 12 to 15 years ($1,500 to $3,000 CAD). Composite decks need only occasional soap-and-water cleaning.
Over a 25-year period, the total cost of ownership for a 3.7×4.9 m wood deck is approximately $10,000 to $21,500 CAD (initial build plus maintenance and partial replacement). The same composite deck costs $8,000 to $13,000 CAD total with virtually zero maintenance expense. At the 15 to 20-year mark, composite becomes the more economical choice.
When to Choose Composite Decking
Composite decking is the better choice in these situations:
- You want a low-maintenance deck that never needs staining, sealing, or painting.
- You live in a region with harsh winters and frequent freeze-thaw cycles — composite resists moisture damage better than wood.
- You plan to stay in the home for 10+ years and want long-term value.
- You prefer a consistent, uniform appearance that will not change over time.
- You want a 25 to 50-year manufacturer warranty for peace of mind.
- You are building a second-storey or hard-to-access deck where maintenance would be difficult.
Composite is the best all-around choice for Canadian homeowners who prioritise convenience, durability, and long-term savings over the lowest possible upfront cost.
When to Choose Wood Decking
Wood decking makes more sense in these situations:
- Your upfront budget is limited and you need to minimise initial construction cost.
- You love the natural look, feel, and scent of real wood (especially BC western red cedar) and are willing to maintain it.
- You live in a region with very hot summers where composite would be uncomfortably hot underfoot — less of an issue in most of Canada compared to the southern US.
- You are building a temporary or short-term structure (5 to 10 year horizon).
- You enjoy DIY maintenance projects and view annual staining as a satisfying seasonal ritual.
- You want a tropical hardwood deck (ipe, cumaru) that offers both natural beauty and 25+ year durability.
Wood is ideal for budget-conscious builders, natural-wood enthusiasts, and projects where the warmth and character of real wood outweigh the maintenance commitment.
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