All Keope products are tested and classified according to the UPEC standards, in order to certify their appropriateness with regard to the intended uses. The tests which the tiles undergo at the "Centre Scientifique du Bâtiment (CSTB)" - in accordance with current ISO regulations - are extremely selective and are aimed at establishing the resistance and performance of the products with respect to four fundamental "dimensions": resistance to wear (U), perforation (P), water (E) and chemical attack (C).

All tiles can be classified in accordance with UPEC standards. This classification makes it possible to find out easily the most appropriate uses for each product and to compare products from the point of view of their technical performance. UPEC certification is carried out by subjecting the tiles to various tests organised by the CSTB using ISO test methods in order to test their technical characteristics and check their behaviour.

A number is associated with each letter to indicate the performance of the material. The higher the number, the better are the technical characteristics of the material examined.