A lining system for lining a surface generates a fluid impervious lining and an interstitial space between said lining and said surface. The system includes a layer comprising a flexible material having an adhesive coating on each side thereof, a second layer of flexible material, and a spacing means to generate a gap between the first and second layers, the gap constituting the interstitial space, and a coating, the coating comprising a curable material which cures to form a hard fluid impervious coating.