What is the cost to address deck board gaps from shrinkage in New Brunswick?

Addressing deck board gaps from shrinkage typically costs $300-$1,200 for most New Brunswick decks, depending on the gap size and your chosen solution. The cost varies significantly based on whether you need simple gap filling, board replacement, or complete re-spacing of the entire deck surface.

Understanding Shrinkage in New Brunswick's Climate

Deck board shrinkage is particularly common in New Brunswick due to our extreme temperature swings and moisture cycles. Pressure-treated lumber can shrink significantly as it dries out over its first 1-2 years, especially lumber that was installed with high moisture content. Our freeze-thaw cycles and Maritime humidity create constant expansion and contraction, which can worsen gaps over time. Cedar boards also shrink, though typically less dramatically than pressure-treated pine.

Cost Breakdown by Solution

For minor gaps (1/4" or less), you can use deck gap fillers or caulking compounds designed for exterior use. Quality products like Bondo Wood Filler or DAP Plastic Wood cost $15-$30 per container, and most homeowners can handle a 200-square-foot deck for $50-$100 in materials plus their time. This is a reasonable DIY project during New Brunswick's warmer months (May through September).

For moderate gaps (1/4" to 1/2"), you'll likely need to add filler strips or replace individual boards. Having a contractor install cedar or composite filler strips costs $8-$15 per linear foot of gap, so a deck with 20 linear feet of problematic gaps would run $160-$300 in labor and materials.

When Gaps Require Professional Help

Large gaps (over 1/2") or widespread shrinkage across the entire deck surface typically requires professional intervention. A contractor might need to remove and re-install boards with proper spacing, which costs $12-$25 per square foot depending on the decking material. For a 200-square-foot deck needing complete re-spacing, expect $2,400-$5,000.

Timing Considerations for New Brunswick

Address gap issues during our dry summer months (July-August) when boards are at their most contracted state. This ensures your repairs won't be compromised when boards expand again during humid fall weather. Never attempt gap filling during New Brunswick's wet spring months or before our first hard frost, as moisture and freeze-thaw cycles will compromise most filler materials.

Prevention vs. Repair

If your deck is relatively new (under 3 years) and the gaps aren't causing safety issues, consider waiting another season. Pressure-treated lumber continues adjusting to our climate for 2-3 years. However, gaps wider than 1/2" should be addressed promptly as they create tripping hazards and allow debris accumulation that accelerates deck deterioration.

For extensive shrinkage problems or structural concerns, New Brunswick Decks can match you with local contractors who understand how our Maritime climate affects deck materials and can provide lasting solutions tailored to your specific situation.