(pronounced tung & gruv)
So many jokes, so little time… Anyway, tongue & groove is a type of wood joinery that is very strong. The concept is brilliant in its simplicity. A piece of wood has a ridge (a.k.a., the “tongue”) along one of its edges and a slot (a.k.a., the “groove”) along its opposite edge. The tongue from one piece fits into the groove of the piece beside it. Put ‘em together and what have you got” Flooring, a ceiling, wall paneling, wainscoting, walls for log cabins… basically any kind of flat surface. Glue is not normally used on these hidden joints because contraction of wood could cause the tongues to rip off. Ouch!