Should I use cedar 5/4 or 2x6 for my Vancouver deck?

For Vancouver deck construction, 2x6 cedar decking is the better choice over 5/4 cedar boards. The extra thickness provides superior structural performance, longer lifespan, and better value in Metro Vancouver's challenging marine climate.

Structural Performance and Span Capacity
2x6 cedar decking (actual dimensions 1.5" x 5.5") can span 24 inches between joists when installed perpendicular to the framing, while 5/4 cedar (actual thickness 1" x 5.5") should only span 16 inches maximum. This means you can space your joists farther apart with 2x6 decking, reducing the amount of framing lumber needed and potentially lowering overall project costs. The thicker boards also feel more solid underfoot and resist bounce or deflection when you walk across the deck.

Moisture Resistance in Vancouver's Climate
The extra half-inch of thickness in 2x6 boards provides a crucial buffer against Vancouver's persistent moisture. With over 1,200mm of annual rainfall and 60-80% humidity levels year-round, deck boards are constantly absorbing and releasing moisture. Thicker boards handle this moisture cycling better — they're less prone to cupping, warping, and surface checking that can occur when thinner boards expand and contract repeatedly. The additional wood mass also means more material between the weather-exposed surface and the structural fasteners below.

Longevity and Refinishing Options
2x6 cedar decking can be sanded and refinished multiple times over its lifespan, while 5/4 boards have limited refinishing potential due to their thinner profile. In Vancouver's climate where annual cleaning and re-staining is essential, the ability to sand out weathering, mould stains, or surface damage extends the deck's life significantly. A properly maintained 2x6 cedar deck can last 20-25 years, while 5/4 decking typically needs replacement in 12-18 years under the same conditions.

Cost Considerations
While 2x6 cedar costs more per board foot than 5/4 material, the total project cost difference is often minimal. The wider joist spacing possible with 2x6 decking reduces framing costs, and the longer lifespan makes it better value long-term. Expect to pay approximately $50-$70 per square foot installed for 2x6 cedar decking versus $45-$60 for 5/4 — but factor in the reduced maintenance frequency and longer replacement interval.

Installation Requirements
Both materials require the same fastening approach in Vancouver — two stainless steel or hot-dipped galvanized deck screws per joist intersection, pre-drilling to prevent splitting, and proper end-sealing of cut boards. The thicker 2x6 boards are heavier and require slightly more effort to handle, but they're less likely to split during installation.

When 5/4 Might Make Sense
Consider 5/4 cedar only for budget-conscious projects where the deck height is critical (the thinner boards reduce overall deck height by half an inch), or for covered decks where moisture exposure is significantly reduced. For most Vancouver deck applications — especially uncovered decks exposed to our marine climate — 2x6 cedar is the smarter investment.

Need help finding a deck builder experienced with cedar installation in Vancouver's climate? Vancouver Deck Contractors can match you with local professionals who understand proper material selection and installation techniques for our unique conditions.