How much should I budget to replace just the deck boards but keep the existing frame in the Lower Mainland?

Replacing just the deck boards while keeping the existing frame typically costs $15-$45 per square foot in Metro Vancouver, depending on your material choice and the condition of your current framing.

The total cost for a 300 square foot deck would range from $4,500 for basic pressure-treated boards up to $13,500 for premium composite decking. This assumes your existing joists, beams, and posts are structurally sound and properly spaced for the new decking material.

Material costs break down as follows: Pressure-treated lumber runs $15-$25 per square foot installed, Western red cedar costs $25-$35 per square foot, and composite decking (Trex, TimberTech, Fiberon) ranges from $35-$45 per square foot. These prices include the decking boards, fasteners, and professional installation labour.

Before committing to a deck board replacement, have your existing frame thoroughly inspected. In Metro Vancouver's persistently damp climate, the joists and beams underneath often show signs of rot or moisture damage even when the surface boards look relatively good. Pay special attention to joist ends where they meet the ledger board or beam connections — these areas trap moisture and decay first. If your existing joists are spaced more than 16 inches on center, you may be limited to thicker decking materials or need to add blocking between joists.

The condition of your existing fasteners matters significantly. If your current deck uses standard zinc-plated screws (common 10-15 years ago), they've likely corroded in Vancouver's climate and should be replaced with stainless steel or hot-dipped galvanized fasteners when installing new boards. This adds $200-$500 to the project but prevents premature failure of the new decking.

Consider upgrading to composite if your frame is solid. While composite costs more upfront ($35-$45/sq ft vs $25-$35 for cedar), it eliminates the annual staining and sealing required for wood in Metro Vancouver's wet climate. Over 10-15 years, the maintenance savings often offset the higher initial cost. Composite also performs exceptionally well in our marine climate — no rot, mould, or insect damage.

Hire a professional for this work. While replacing deck boards might seem straightforward, proper fastener selection, board spacing for drainage, and identifying structural issues in the existing frame require experience. A contractor can also determine if your existing joists meet current BC Building Code requirements for your chosen decking material and identify any moisture damage that needs addressing before installing new boards.

Need help finding a deck contractor for your board replacement project? Vancouver Deck Contractors can match you with experienced professionals from the Vancouver Construction Network who specialize in deck renovations and understand Metro Vancouver's unique climate challenges.