Abstract: A device for fixing elements in the form of plates to a roof cover for a building, at a distance therefrom, the cover including, on the surface, a coating or a sealing layer attached to the essentially continuous support forming the roof, the device including blocks that can be height-adjustable or not, for supporting and holding the plate-shaped elements, each block having a base with a lower smaller plate to be applied to the surface of the cover and secured thereto, and a head or upper part for directly or indirectly supporting at least one plate-shaped element, the bottom face of the smaller plate (9) of the base (8) of each block (7) being provided with a part (11) of the plate, forming a protector, which is mechanically fixed to the smaller plate (9).