TT4 / 1 Tactile warning markings for the blind and for the people with weak vision. In case of new floor coverings, the warning markings installed between the floor tiles are showing an attention catching meaning for the blind and visually impaired. It is a tactile floor covering marking, with a unified meaning, which can be used for the indication of the stairs, platforms and obstacles. The gres tiles with the tactile markings provide a demanding appearance. An easy-to-clean, long-lasting solution for the creation of a demanding barrier-free environments.