What is Lippage on floor ?
Lippage of tile and stone installations is increasingly becoming a highly contentious issue in the industry. Often times, expectations far exceed the physical abilities of the tile or stone, or the physical characteristics of the surface on which the tile or stone will be installed to provide for a perfect installation. Over time, the size of tile and stone modules has increased significantly; a trend which continues today. It was not too long ago when a large format tile was considered to be 12” x 12” (300mm x 300mm) tile. Now, some manufacturers are producing tile that is 4’ x 4’ (1200mm x 1200mm) or larger. With the increase in module sizes comes the increase for substrate tolerances which are much tighter than the industry guidelines require. The first question which needs to be answered is: What is lippage? According to ANSI A108.02 4.3.7, Lippage refers to differences in elevation between edges of adjacent tile modules.
For more details ,you can view here.