Glue-down decorative floor covering system

A glue-down decorative floor covering system, comprising a plurality of interlockable decorative flexible floor tiles, wherein each floor tile is rectangular, either oblong or square, and comprises a first pair of opposite edges and a second pair of opposite edges;

• wherein the first pair of opposite edges comprise mechanical coupling parts allowing to mutually mechanically couple a plurality of such tiles to each other, wherein said coupling parts form a first locking system that effects a locking of mutually coupled tiles in a plane of the tiles and perpendicular to the respective edges, as well as form a second locking system that effects a locking of mutually coupled tiles perpendicular to the plane of the tiles, wherein the coupling parts substantially are realized from said substrate layer;
• wherein the coupling parts at said first pair of opposite edges are configured such that two of such tiles can be coupled to each other at said edges by a turning movement and/or vertical movement, and wherein the second pair of opposite edges is free of any mechanical coupling parts,
• wherein the second pair of opposite edges consists of a third edge and an opposite fourth edge, wherein the third edge is provided with a substantially vertical third end surface and wherein the fourth edge is provided with a substantially vertical fourth end surface, wherein a top section of the third end surface and the fourth end surface engage to each other, or are in contact with each other, over at least half the thickness of the tiles, and
• wherein, in coupled condition of adjacent tiles, the third end surface faces the fourth end surface, such that the top section of the third end surface and the fourth end surface engage to each other.