In the manufacture, cement, quartz sand, pigment dye based on iron oxide are used. But this tile is not exposed to firing. The quality of the finished product is more dependent on the materials used and compliance with the conditions of the process. After the production of tiles, special filler compositions are applied to it to improve the appearance and improve physical properties. You can also find tiles without adding dyes. Although such tiles are probably used only in the restoration of old buildings. To date, manufacturers provide full color scheme. For a price, such a tile is cheaper than ceramic, although the same in parameters. There is practically no noise from the wind and rain. Approximate service life up to 100 years. With the help of modern tiles, it is possible to make a pitched roof of almost any complexity. But do not forget about the great weight of the tile. Therefore, you need to use reinforced rafters. Or reduce the step of the rafters. High fire resistance, resistance to aggressive environment. High frost resistance and noise insulation. When assessing the quality of the tile, do not forget about porosity and density. If a lot of porosity and pores appear on the external surfaces, then a lot of moisture will wake up, which will reduce frost resistance and the strength worsens. Before choosing clay or concrete tiles. It is worth saying that ceramics are more expensive, and the color scheme is limited, but it is more thin and more aesthetic. Cement-sand, in turn, has a wider color scheme and a lower price.