瓷砖铺贴高低差 lippage 怎么判断,别一上来就全拆

做 kitchen backsplash 时,有次客户第二天一看就说瓷砖"翘起来了"。现场不是整面墙都坏,而是靠窗那一段 3x12 subway tile 有几片 lippage 明显,灯一打影子很重。问题根子不是师傅没压平那么简单,旧墙 drywall 局部鼓包,加上台面后挡边本来就不直,前一天赶进度没有先把 substrate flatness 复测清楚。 我没有马上让工人全拆。先用 4ft level 和 straightedge 贴墙量高低,再用 spacer 对 grout joint,确认是单片砖浮起、thinset 厚薄不均,还是墙体本身 out of plane。能在 thinset 没完全固化前处理的,当天把问题砖取下,清掉背面和墙面浆料,重新补 thinset;已经硬化的位置,只拆影响视线和手感的几片,不扩大范围。重新铺的时候加 tile leveling clip…

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