The floor according to the invention consists of boards (1), especially wood boards laid on joists (2) and secured to them by fasteners (3) or adhesive and is designed for the use on the unroofed area, external terraces, platforms and jetties or in rooms where water may run out on the floor, while the board (1) of the floor along its bottom edge has the water drip (4), and located between the board (1) of the floor and the joist (2) is the distance piece to mover away the bottom surface of the board (1) of the floor from the top surface of the joist fragment passing especially under the water drip (4). Moreover, the board (1) is secured to one joist (2) by three fasteners (3).