鋪磚為什么要留縫？
Why do we need to leave a joint in the laying of bricks?
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1、瓷磚有熱脹冷縮問題
1. Ceramic tile has the problem of thermal expansion and cold shrinkage
瓷磚及粘貼瓷磚的水泥砂漿都會存在熱脹冷縮的問題，在溫度或濕度改變的過程中，瓷磚及水泥砂漿都會存在一定的伸縮，如果不留縫的話，會導致瓷磚在后期使用的過程中出現起鼓或者開裂。
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.
