Kerfing refers to the process of bending a piece of wood by cutting slots that don’t make it all the way through.
Sometimes these slots are cut into a specific shape. Box makers use this technique to create the sides of a box out of one piece of wood rather than four.
Using an adze for kerfing a box
To kerf the inside edges of a box, you will need a hand adze with a straight blade.
Step 1 – Mark out divisions
You’ll need to mark three lines along your piece of wood to mark it into four equally sized sections.
Step 2 – Note shape of channel
The shape that needs to be channelled out with your adze is quite specific. It’s the same shape as your adze blade!
Step 3 – Carve
Carefully carve out the shape in the diagram along all three of the lines you have marked.
Step 4 – Assemble your box
Once all of these lines have been hollowed out, you’re ready to fold the piece of wood into a box shape and nail it together.