How to Repair a Warped Hardwood Floor

Written by kevin mcdermott
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When a hardwood floor has warped, it usually means moisture has soaked into the wood, causing it to expand and then shrink as the water evaporates. If a significant portion of the floor is warped, you may have to replace the whole floor, but if it’s just a few planks, you can extract and replace those planks. Talk to your flooring supplier about finding the right replacement boards.

Skill level:
Moderate

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Things you need

  • Sidewalk chalk
  • Circular saw
  • Sharp wood chisel
  • Hammer
  • Replacement floor boards (same size and type as the warped boards)
  • Utility knife
  • Carpenter’s glue
  • Finish nail gun

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Instructions

  1. 1

    Determine which boards in the floor are warped. Mark each with sidewalk chalk. Measure each warped board. Buy a replacement board of the same make, size and shade as each of the warped boards.

  2. 2

    Put your circular saw onto one of the replacement boards you bought, and use the depth of the board to set the depth of the blade, making it as deep as a floorboard.

  3. 3

    Cut out the first of the warped floorboards. Run the saw flat along the length of the board. Make several long, intersecting cuts. Don’t let any of the cuts touch the edges of the board.

  4. 4

    Dig out the cut chunks of flooring from the middle of the board with your hammer and chisel. Pry the edges of the board inward, being careful not to the damage the surrounding boards. Get the warped board out completely.

  5. 5

    Lay the replacement board face down on a work surface. Cut off the bottom lip of the groove that’s along one edge of the board, so only the top lip of the groove remains. Put carpenter’s glue along both sides.

  6. 6

    Install the new board by inserting the tongue side of the replacement board into the groove of the adjacent board. Lower the other side down. The missing bottom lip of the grooved side will allow the board to sit right down into the space, settling over the tongue of the adjacent board.

  7. 7

    Secure the replacement board with the nail gun, with nails every 10 to 12 inches along both edges of the board.

Tips and warnings

  • Wear goggles when removing the warped floor board.

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