Flooring system comprising a plurality of mechanically joinable floorboards and method for making such floorboards

摘要

The invention relates to a flooring system comprising mechanical joinable floorboards (1,1'), each having a body (30), a lower balancing layer (34) and an upper surface layer (32). A strip (6) is formed in one piece with the body (30) of the floorboard (1) and extends under an adjoining floorboard (1'). The strip (6) has a locking element (8), which engages a looking groove (14) in the underside of the adjoining floorboard (1') and forms a horizontal joint. A tongue (38) and a tongue groove (36) form a vertical joint between upper and lower plane-parallel contact surfaces (43,45) and are designed in such manner that the lower contact surfaces (45) are on a level between the upper side of the locking element (8) and a plane containing the underside (3) of the floorboard. The flooring system is characterized in that the lower contact surface (45) comprises portions that are outside and close to the joint plane (F).