They are a relatively new joinery method, invented by the Lamello company in the 1950′s and used extensively in post-war European cabinet shops. It crossed The Pond in the 1970′s and was adopted in North American production shops shortly after.
The biscuit – or plate – jointer did speed the process of joining two boards together. Whether connecting two pieces of plywood, solid wood, MDF… or whatever other material you may be working with… the biscuit joint has proven to be a versatile way of connecting boards.
However, joint test data suggests that for nearly all joints, the biscuit is probably one of the weakest joinery methods available. So, this week, how do you feel about the biscuit joint? Super strong and versatile shop hero, or gimmicky joint with little more strength than a butt joint?