Repairing the Side of a Warped Cabinet

Remove the door of the cabinet by detaching the hinges from the side board of the cabinet. Set the door aside for later. Unscrew any attachment hardware necessary to remove the warped board, removing the entire cabinet if necessary. Remove any other board on the cabinet that has the same dimensions as the warped board but is not warped, as this board will give a better example for copying than the warped one.

Hold the warped board, or the unwarped board with the same dimensions, over a piece of plywood or MDF, depending on what the rest of the cabinet is made from. Choose a material that is the same thickness as the other cabinet boards. Trace the outline of the board on the new material.

Cut out the new cabinet board with a saw. Sand the rough cut edges with medium-grit sandpaper. Wipe the board clean.

Apply a coat of stain or paint to the board lightly, brushing with smooth, even strokes that follow right along the wood grain. Let the first coat dry for an hour, then reapply a second coat. Continue to apply the finish until the dried cabinet board matches the color of the other cabinet boards. Apply three or more coats of sealant following the same procedure. Let the cabinet board dry overnight.

Hold the cabinet board in place where the warped board was positioned. Mark the spots on the board where bracket hole and attachment screws are located. Remove the board and drill out holes in each spot. Reposition the board and attach it in place using the original hardware. Attach the door to the cabinet and make any necessary adjustments for a straight fit.