Abstract: A process for lining a pool, which includes applying a lining consisting essentially of an impermeable membrane, based on flexible PVC comprising a glass reinforcement, to at least one wall of a pool, in which the membrane comprises two flexible PVC layers placed at least in part on either side of the glass reinforcement. When applying the lining, a rounded part at a base of the wall is provided so that a void forms between the membrane and the wall, serving as an expansion region, so that when swelling of the membrane occurs to form fit the membrane to the wall no wrinkles form in the membrane.

Abstract: Impermeable membrane for pools, based on flexible PVC containing a glass reinforcement; manufacturing process and use of such a membrane.

Abstract: A method for preventing the formation of black marks on the walls of sunken pools containing water contaminated by copper ions, which consists in treating the water using an effective amount of a metal sulfide having a water solubility at least equal to the solubility of copper sulfide. The treatment reduces the concentration of copper ions in the water and prevents the formation of black marks on the walls.

Abstract: An impermeable membrane contains at least one flexible support layer made of a polymer containing chlorine, at least one adhesive layer consisting of a copolyamide whose degree of crystallization is less than 20% and a film of a polymer containing fluorine.