Why do we need to leave a joint in the laying of bricks?
1. Ceramic tile has the problem of thermal expansion and cold shrinkage
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.