Torstein is the first porcelain gres series from the Grohn collection for outdoor use, which is available in the format 60 x 60 cm in a material thickness of 2 cm. Correspondingly, there is the same format in a thickness of 1 cm for indoor use, also the formats 60 x 120 cm, 30 x 120 cm and 30 x 60 cm. The tiles are equipped with the R10 slip resistance for indoor use and R11 / b for outdoor use. With this new porcelain gres series, which is produced calibrated, rectified and solid-coloured, interior spaces such as the living room, hallway or kitchen can be extended to a certain extent outside. Due to its natural colors, the tile is a good choice for outdoor use: it has a less dominant appearance and adapts unobtrusively to its surroundings with its timeless elegance.