A tongue and groove joint provide a mechanical means of joining the edges of narrow boards when forming a wider panel.

 

Beveled tongue and groove joint

Blind tongue and groove joint

Double dovetailed tongue and groove joint

Double tongue and groove joint

Dovetailed tongue and groove joint

Loose tongue and groove joint

Rounded tongue and groove joint

Secred nailing tongue and groove joint

Shiplap joint

Tongue and groove joint

Tongue and groove joint with bead

Tongue and staggered groove sides joint

Tongued grooved and veed joint