This European Standard specifies the visual, dimensional, mechanical and durability characteristics of plasticized poly(vinyl chloride) (PVC-P) homogenous membranes of nominal thickness greater than or equal to 0,75 mm for use as liners for inground swimming pools. It also specifies the characteristics of the composition of the PVC-P used to produce the membranes. It applies specifically to homogenous membranes intended for use in swimming pools where the water temperature is less than or equal to 28 °C. If the membrane manufacturer permits a temperature of water continuously maintained above 28 °C, this document also applies.