Abstract: Board floor having a main floor portion made up of boards each bounded by a peripheral groove and joint strips which are substantially narrower than the boards. The joint strips each have tongues extending outwardly from opposite sides to engage the grooves of the boards. Underneath the floor are a series of support beams to which the joint strips are anchored. A floor board adapted for fitting between a wall and the main floor portion of the board floor has a longitudinal undercut extending over a substantial portion of its breadth.

Abstract: Wall boardings having a series of wainscoting elements mounted in parallel and undercut at all edges. Strip-shaped lining mouldings are disposed both at the ends and between the wainscoting elements. The mouldings are overlapped along an adjacent undercut side edge of the wainscoting elements.