Patent ID: 8667758

Claim:
A prefabricated element for covering roofs and vertical surfaces, the prefabricated element comprising: a base layer having a waterproofing substrate; an upper covering, made of slate parts fixed by adhesive and placed in at least one row; fastening means for mechanical fastening of the slate parts; and anchoring means for anchoring the prefabricated element to a roof; wherein said base layer serves as a supporting element for the slate parts and projects, with respect to a surface covered by the slate parts, along two edges of said surface in zones overlapping with adjacent layers, in the formation of the covering; wherein on each base layer the slate parts are placed forming a single row, the prefabricated elements being placed in the covering in an arrangement adjacent to the slate parts of consecutive rows partially overlapped with one another; and wherein the fastening means of the slate parts partially overlapped in consecutive rows comprise hooks arranged between parallel edges from which the overlapping is formed, said hooks being fixed to the lower slate parts and to the roof, and partially embracing the overlapping slate parts; and wherein the anchoring means to the roof comprise nails or joining elements which go through the hooks and are nailed in the roof; wherein the anchoring means for anchoring the prefabricated element to the roof or surface to be covered comprise nails inserted through holes drilled in the slate parts; and wherein the hooks between the partially overlapped slate parts of consecutive rows are U-shaped wire hooks, one of whose branches runs between every two consecutive slate parts and finishes in a downwardly bent section, which goes through the base layer, while the other branch of the hook runs over said slate part, directed towards the projecting zone of the base layer, so as to embrace the consecutive overlapped slate parts approximately three inches from a lower edge.