Graphical Construction Glossary >> Woodwork. >> Joints >> Finger Joint

Finger Joint

A factory method of joining random lengths of timber into standard long lengths. Used to produce flooring and mouldings.

In the sketch above:-

1. More or less a multi tongue and grooved joint. These joints were used for jointing solid bench and table tops. The theory being that they gave a greater surface area for the glue to grip. It seems like manufacturers are now laminating solid tops just using plain butt joints, thereby saving material but they get the strength by using modern epoxy glues.
2. The joint here is the development of the joint above, with many fine finger or wedge shaped parts. Particularly using plantation grown pine manufacturers can produce long lengths of material using many short pieces that would otherwise be scrap. Typically the lengths of these finger jointed mouldings are 5.2M long, which in the case of architraves is just nice to go around a standard door frame.

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