This European standard specifies the minimum additional characteristics which are necessary for: polyvinyl chloride floor coverings in roll form according to ENISO10581 or ENISO10582 and polyvinyl chloride floor coverings with foam backing in roll form to EN651 to be installed satisfactorily in special wet areas to form a watertight installation with a long life. It specifies two categories ( A and B) for use on different substrates.