Principally based on prefabricated sheets with a tridimensional structure (nodules, filamentary nets, intertwined structures etc.), of variable height between 2 – 50 mm, designed as a draining layer and protector for buried structures and foundations in contact with the terrain.

These are used as a protector for waterproofing systems and the drainage of walls, decks in buildings and buried and floating structures of all types, buried walls, screen walls, tunnels, vaults, floating decks etc.