I heard that you should be sticking up the external wall, and the price of this brand is a little more expensive than other brands. . But his tiles are of good quality. . His raw materials belong to high territory, (ancient pottery clay) He is more pro-active, and the tiles he makes are more elastic and hard, which is the same feeling as rubber. . ),, more frost resistance, crack resistance. . . . I'm from his place of production, so I know better. Hehe, I hope I can help you. . . . .