Chamotte is a fireproof clay, kaolin with rather coarse structure that is annealed at the temperature of 1300-1500°C. The composition of raw chamotte mass includes several types of clay and grinded bits of annealed chamotte. The addition of chamotte bit reduces shrinkage at annealing and makes the product more elastic. It provides more exact and predictable results than in ceramic products. Chamotte tiles have better heat and water resistance, and durability in comparison with ceramic tiles. That is why it is a chamotte tile which was widely used in the era of Modernism when all the buildings and their elements had to comply with the demands of long-term use.

Chamotte tiles are thicker than ceramic ones and often has matte surface of natural tones.

Uzhhorod governmental and residential buildings on 1920s often have monochromatic chamotte tiles which create a pattern through combination of different colours. For example, in the buildings of Regional Government and Regional Court one may see the preserved chamotte tiles of warm ochre and deep red tones.