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 . <EOS>