1. Ceramic tiles will have the problem of thermal expansion and cold contraction due to the influence of paving materials: we know that materials have the characteristics of thermal expansion and cold contraction. Although ceramic tiles are fired at high temperature, they will also be affected by paving materials. Ceramic tiles and cement mortar pasted with ceramic tiles will have the problem of thermal expansion and cold contraction. In the process of temperature or moderate change, ceramic tiles and cement mortar will have a certain expansion. If no joints are left, the ceramic tiles will appear bulge or crack in the process of later use.

2. Under the permission of national standards, there are certain deviations in ceramic tiles: although ceramic tiles are all mechanized production now, there will be certain dimensional deviations in the process of product production. If no seams are left, it is easy to have uneven seams when tiles are paved, which will affect the beauty of tiles.

3. There are errors in the construction of workers: the tiling of ceramic tiles is a construction project with a high degree of proficiency. Workers can not completely make sure that there is no error in the tiling of each tile in the whole process of tiling. If there is no joint, it is difficult to ensure the straightness of the joints of ceramic tiles.

To sum up, the process of tile paving requires seam paving!