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How to Replace Wood Planks on a Deck

Published in Deck Repair 4 mins read

Replacing damaged wood planks on your deck involves a series of steps, from assessing the damage to installing and finishing the new boards.

Here's a breakdown of the process based on standard deck repair methods:

Step-by-Step Guide to Replacing Deck Boards

Repairing or replacing damaged deck boards is a practical way to maintain the safety and appearance of your deck. Following a systematic approach ensures the job is done correctly and efficiently.

The process typically involves these key stages:

Step 1: Assess the Damage

Before starting any work, thoroughly inspect your deck to identify which boards are damaged. Look for planks that are:

  • Rotting
  • Split or cracked significantly
  • Loose or unstable
  • Severely warped

Clearly mark the boards that need replacing to avoid confusion later.

Step 2: Plan Your Cuts

Once damaged boards are identified, plan how you will cut them out.

  • Determine the exact locations for cuts to ensure clean removal.
  • Cuts are often planned over joists where possible, but sometimes cuts are needed mid-span (requiring later support).

Step 3: Cut Out Damaged Boards

Carefully cut through the marked boards to remove the damaged sections.

  • Use a circular saw or a reciprocating saw for this task.
  • Set the saw blade depth to just slightly more than the thickness of the deck board to avoid cutting into the joists below.
  • Make cuts along the length of the board, often near the fasteners or over the joists.

Step 4: Remove Boards

After cutting, remove the pieces of the damaged boards.

  • Use a pry bar to lift the cut sections away from the joists.
  • Be careful not to damage adjacent boards or the underlying structure.
  • Remove any old nails or screws left behind in the joists.

Step 5: Add Support Cleats

If the damaged section you removed does not end directly over a joist, you will need to add support.

  • Cut pieces of lumber (often 2x material) to act as support cleats.
  • Attach these cleats to the side of the nearest joists where the new board's end will rest, providing a secure fastening point.

Step 6: Measure and Cut Replacement Boards

Measure the exact length needed for each replacement board.

  • Cut new deck boards to these specific measurements using a saw.
  • Ensure the cuts are square and fit snugly in the gap.

Step 7: Install Replacement Boards

Place the new boards into the prepared gaps.

  • Position the board correctly and align it with the existing deck surface.
  • Secure the new boards to the joists (and any added support cleats) using appropriate deck screws or nails. Ensure fasteners are driven flush or slightly below the surface.

Step 8: Stain and Seal the New Boards

To protect your new boards and blend them with the existing deck, stain and seal them.

  • Clean the new boards thoroughly before applying stain or sealant.
  • Match the color of the existing deck finish as closely as possible.
  • Allow the finish to dry completely according to the product instructions.

By following these steps, you can effectively replace damaged wood planks, restoring the integrity and appearance of your deck.

Here is a summary of the key steps:

Step Action Purpose
1. Assess Damage Identify and mark damaged boards. Determine repair scope.
2. Plan Cuts Decide where to cut damaged boards. Facilitate removal and potential support needs.
3. Cut Out Boards Make cuts through damaged planks. Prepare for removal.
4. Remove Boards Pry up and remove cut sections. Clear space for new boards.
5. Add Support Cleats Install extra support where needed. Provide fastening points for board ends not over joists.
6. Measure & Cut New Measure gap and cut replacement lumber. Prepare boards for installation.
7. Install New Boards Fasten replacement boards into place. Secure the new deck surface.
8. Stain & Seal Finish new boards with stain and sealant. Protect wood and match deck appearance.

Remember to wear appropriate safety gear, such as safety glasses and gloves, when working with power tools and lumber.

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