A waterproof covering system for covering a surface comprising: [a] a geotextile, with a first face intended to be applied on said surface and a second face opposite to said first face, [b] a geogrid, comprising a plurality of fibres intertwined with each other and said geogrid being arranged on said second face of said geotextile, and [c] a plurality of anchoring means, each anchoring means of said plurality of anchoring means comprising: [i] a nailing member for nailing said anchoring means on said surface through said geotextile and [ii] a retaining plate operatively associated with said nailing member, wherein said retaining plate comprises a plurality of through holes and said retaining plate isarranged such that in the operation position of said anchoring means, when said anchoring means are nailed on said surface, said retaining plate overlaps said geogrid, and said waterproof covering system further comprising [d] a first coating layer of synthetic polymer forming a continuous coating that [i] from a liquid state in which said synthetic polymer is applied by in situ projection to cover said second face of said geotextile, said geogrid and said anchoring means, [ii] said first coating layer is cured to a solid state to provide a positive fit connection between said first coating layer and said retaining plate of each of said anchoring means. [a] a geotextile, with a first face intended to be applied on said surface and a second face opposite to said first face, [b] a geogrid, comprising a plurality of fibres intertwined with each other and said geogrid being arranged on said second face of said geotextile, and [c] a plurality of anchoring means, each anchoring means of said plurality of anchoring means comprising: [i] a nailing member for nailing said anchoring means on said surface through said geotextile and [ii] a retaining plate operatively associated with said nailing member, wherein said retaining plate comprises a plurality of through holes and said retaining plate isarranged such that in the operation position of said anchoring means, when said anchoring means are nailed on said surface, said retaining plate overlaps said geogrid, and said waterproof covering system further comprising [i] a nailing member for nailing said anchoring means on said surface through said geotextile and [ii] a retaining plate operatively associated with said nailing member, [d] a first coating layer of synthetic polymer forming a continuous coating that [i] from a liquid state in which said synthetic polymer is applied by in situ projection to cover said second face of said geotextile, said geogrid and said anchoring means, [ii] said first coating layer is cured to a solid state to provide a positive fit connection between said first coating layer and said retaining plate of each of said anchoring means. [i] from a liquid state in which said synthetic polymer is applied by in situ projection to cover said second face of said geotextile, said geogrid and said anchoring means, [ii] said first coating layer is cured to a solid state to provide a positive fit connection between said first coating layer and said retaining plate of each of said anchoring means.