NOVELTY - The module (1) has a laminate (2) provided with a top border (4) and a bottom border (5). The top border comprises a top crosspiece (10). The bottom border comprises a bottom crosspiece (20) having shape adapted to that of the top crosspiece such that the top and bottom crosspieces of the top and bottom borders of the module and an adjacent module arranged one above the other are provided to block translational movement of one of the modules relative to the other along a direction transversal to a plane of a roof.    USE - Upper or lower photovoltaic module for use on a roof of an industrial building and a residential building.    ADVANTAGE - The bottom border comprises the bottom crosspiece having the shape adapted to that of the top crosspiece such that the top and bottom crosspieces of the top and bottom borders of the module and the adjacent module arranged one above the other are provided to block the translational movement of one of the modules relative to the other along the direction transversal to the plane of the roof, thus eliminating the need for additional mechanical parts to maintain the photovoltaic modules between them and preventing vertical uplifting of the modules due to strong wind, and hence facilitating mounting of the modules on the roof with optimal security in a simple and rapid manner. The laminate and/or the bottom crosspiece of the bottom border of one of the photovoltaic modules placed above the other photovoltaic module partially covers the top crosspiece of the top border of the latter photovoltaic module so as to eliminate the need for gaskets for sealing the modules and to permit flow of rainwater from the upper module towards the lower module without infiltration risks at an interface between the modules while limiting usage of junction parts and to increase a glass surface of an assembly of the modules.    DETAILED DESCRIPTION - The borders are made of materials including loaded polymers, glass fiber and metal reinforcing materials. The borders are made from stainless materials e.g. such as aluminum or zinc, resistant to ultraviolet radiations. An INDEPENDENT CLAIM is also included for a method for mounting a set of photovoltaic modules.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a photovoltaic module.    Upper or lower photovoltaic module (1)    Laminate (2)    Top border (4)    Bottom border (5)    Top crosspiece (10)    Bottom crosspiece (20)