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.
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2、瓷磚存在合理誤差
2. There are reasonable errors in tiles
瓷磚盡管現在都是機械化生液壓鋼壩  產，但是在產品生產的過程中，會存在著一定的尺寸誤差（誤差過大就屬于產品的質量問題了），如果不留縫的話，容易出現瓷磚鋪貼時的接縫不平整，影響瓷磚的美觀。
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