A panel, which is rectangular and has long and short edges, includes a coupling part on each long edge and on each short edge, which allows coupling of the panel to another such panel.

A set of essentially identical floorboards each including a front face and a rear face extending in the horizontal plane, a core, and a surface layer, a mechanical locking system is arranged at least at two opposite edges for connecting a floorboard with an adjacent floorboard in a horizontal and a vertical direction, said mechanical locking system being configured for connecting the floorboard with the adjacent floorboard by vertical folding, wherein one of said opposite edges is provided with a horizontally extending protrusion at an upper edge, and wherein said protrusion is configured to overlap a surface groove at an upper edge of the other of said opposite edges, such that two connected and adjacent floorboards have upper overlapping edges.

A flooring assembly comprising a plurality of flooring units each unit comprising a first stability core layer having a top surface, a bottom surface and a plurality of edge surfaces, at least two of the edge surfaces having an interlocking mechanism for attachment to the edge surfaces of the first stability core of adjacent flooring units; a sound attenuating acoustic layer attached to the top surface of the first stability core layer; a second stability core layer attached to the top surface of the acoustic layer and having a top surface, a bottom surface and a plurality of edge surfaces, at least two of the edge surfaces having an interlocking mechanism for attachment to the edge surfaces of the second stability core of adjacent flooring units; and a finish layer attached to the top surface of the second stability core layer, wherein (1) each of the layers is polygonal, and the assembly of flooring units is attachable to a surface of a structure.

Building panels, especially floor panels are shown, which are provided with a locking system that is configured to lock the adjacent edges by angling and that have a tongue and a strip on the same edge, and a method to divide a board and produce such building panels.

A flooring system with interlocking panels includes at least one panel assembly. The panel assembly includes a panel and at least one foot. A bottom side of the panel includes ribs forming cavities. Each cavity includes a rib with an opening. The foot is configured to couple to the bottom side of the panel. The foot includes clip assembles coupled to the top side of the foot. Each clip assembly includes a flexible plate and a hook. The first end of the flexible plate is coupled to the top side of the foot. The second end of the flexible plate is decoupled from top side of the foot. The hook resides at the second end of the flexible plate and is configured to reside within the opening in the rib of a corresponding cavity. The foot includes openings that allow moisture and air to traverse.