Shiplap siding is a building material that protects the underlying structure of your house from water and damage from the sunlight.

The separate boards which are used to make up the siding are designed to lock together tightly with one another to create a shell around the house.

To repair damaged shiplap siding will involve first cutting the board in half, lengthwise so that it can be removed from the middle of the surrounding boards. After the board has been cut in half, it can then be removed and replaced.

What you’ll need:

  • Circular saw
  • Pry bar
  • Slater’s ripper
  • Hacksaw blade saw

Use the circular saw to cut the damaged siding board in half as stated above. Adjust the saw blade so that it cuts to a depth that matches the thickness of the siding board. The pry up the bisected board using the pry bar. Slide the bar in near the nail holes and lift the split halves of the boards until the shafts of the nails are visible.

Then, using a slater’s ripper, pull the nails up, or cut the nail shaft with a hacksaw blade saw. After you have either pulled or cut the nails, remove the two pieces of the siding board from the wall.

Use the circular saw to cut a new piece of shiplap siding to the proper length and fit the wood into place, notching the top edge of the board underneath the overhanging bottom edge of the board above. It is advised to use a mallet to gently knock the board into place.

Fasten the board in place with corrosion-resistant nails. To achieve a consistent appearance, follow the existing nail patterns when inserting the new nails.