"the iconic surface of Foundry Flats isn't complete without the grout finish. this is mainly because the movement of the stoneware clay that makes up the various clé Foundry Flats creates variation requiring a 3/8"" grout joint. in turn, this grouted finish gives the surface the traditional effect expected of brick. at clé we suggest 4 grout shades in our unglazed tile grout -timberwolf, brick red, bamboo, and charcoal. and by simply interchanging any of these grout shades with any of the foundry flat colors- you can produce a myriad of surfaces.