The degree of moisture resistance.

The degree of moisture resistance.

In its resistance to moisture, the tile is divided into 8 groups. The degree of extrusion is usually marked with letters «A» and «B». The most moisture resistant are the groups “A -I” and “B — I”. Tiles of these groups absorbs up to 3% moisture. Groups «A-I» I and «B-II»-up to 6% and further on the growing. 10% or more moisture can absorb the tile of the A-III group. Tiles belonging to the first three groups do not crack in the cold and it can be used on the street. The remaining groups are suitable for decoration indoors. In the bathroom and in the kitchen, it is best to put the tile of group I and II.