Primed Finger-Joint
A lumber manufacturing technique where short wood pieces are joined with interlocking finger-shaped cuts and glue, then factory-primed for paint-grade exterior trim.
In Detail
Finger joints create long trim boards from short lumber pieces that would otherwise be waste. The joints are glued with waterproof adhesive and are stronger than the wood itself. Factory primer seals all surfaces, but cut ends must be re-primed on site to prevent moisture intrusion through exposed end grain.