Labor: $'+laborCost.toFixed(2)+'
Fasteners: $'+fastCost.toFixed(2)+'
Waste ('+(wastePct*100).toFixed(0)+'%): $'+wasteAmt.toFixed(2);}
Calculator Use
The deck board replacement cost calculator is a professional-grade tool designed for homeowners, contractors, and DIY enthusiasts to estimate the financial requirements of resurfacing an existing deck. Unlike building a new deck from scratch, replacement focuses on removing the old, weathered surface boards and installing new material while keeping the structural joists intact.
By using this calculator, you can compare different material types—from affordable pressure-treated pine to premium composite decking—and see how labor rates in your local market impact the final bottom line.
- Deck Area (sq. ft.)
- The total surface area of the deck boards you intend to replace. Length multiplied by width.
- Material Type
- The specific decking product you choose. This is usually the largest variable in project cost.
- Labor Cost
- Professional installers typically charge between $5 and $15 per square foot for removal and installation of new boards.
How It Works
Calculating the cost involves aggregating four primary expenses: materials, labor, hardware, and waste buffer. The deck board replacement cost calculator applies a standard formula to ensure all hidden costs are accounted for.
Total Cost = [(Area × Material) + (Area × Labor) + (Area × Fasteners)] × (1 + Waste %)
- Material Cost: Calculated by multiplying the square footage by the specific cost per foot of the chosen wood or composite.
- Labor Variable: Includes the time to strip old boards, check joists for rot, and install the new surface.
- Waste Factor: Crucial for angled cuts, stairs, and edge trimming. A 10% waste factor is standard for rectangular decks, while 15-20% is recommended for complex shapes.
- Hardware: Covers the cost of hidden fasteners, deck screws, and joist tape.
Calculation Example
Example: A homeowner wants to replace the boards on a standard 12×20 foot deck (240 sq ft) using mid-range Composite decking.
Step-by-step solution:
- Area: 240 sq ft
- Material: $12.00/sq ft (Composite) = $2,880
- Labor: $8.00/sq ft = $1,920
- Fasteners: $1.50/sq ft = $360
- Subtotal: $5,160
- Waste (10%): $516
- Total Result: $5,676
Common Questions
Should I replace the joists too?
If the framing is structurally sound and free from rot, you can simply replace the boards. However, if the deck is over 15 years old, it is vital to inspect the ledger board and joists for soft spots before installing expensive new composite boards.
Is composite decking worth the extra cost?
While the deck board replacement cost calculator shows a higher upfront investment for composite, it saves money over time because it does not require annual staining, sealing, or sanding. It also typically has a lifespan of 25-30 years compared to 10-15 for pressure-treated wood.
How can I lower my deck replacement cost?
The easiest way to reduce costs is to handle the demolition and disposal of old boards yourself. Removing the old material can save you $2-$4 per square foot in professional labor charges. Additionally, choosing a standard wood species like pressure-treated pine offers the lowest material cost per square foot.