Ceramic tile and cement mortar pasted with ceramic tile will have the problem of thermal expansion and cold contraction. In the process of temperature or humidity change, ceramic tile and cement mortar will have certain expansion and contraction. If there is no seam left, it will lead to bulge or cracking of ceramic tile in the later use process.
2. There are reasonable errors in tiles
Although the ceramic tile is now mechanized production, but in the process of product production, there will be a certain size error (too large error belongs to the quality problem of the product). If there is no seam left, it is easy to have uneven joints when tile paving, which will affect the beauty of ceramic tile