Tile lippage definition (standards language)
Lippage is variation in height between adjoining tiles, and is defined in ANSI A108.02.
What is "acceptable" lippage?
Tolerance depends on grout joint width and tile warpage. ANSI A108.02 tolerances include:
- For certain grout joint widths, allowable lippage can be 1/32 inch plus allowable inherent warpage
- For wider joints, tolerances increase accordingly
Why lippage happens (most common causes)
- Subfloor is not flat enough
- Large-format tile installed without the right prep
- Warped tiles (manufacturing warpage) meets poor layout choices
- Inconsistent thinset coverage and setting technique
Why homeowners should care (beyond appearance)
- Trip hazard risk in walk paths
- Edges chip more easily
- Light raking across floors makes every edge visible
Professional solutions that actually match the cause
- Evaluate flatness and layout strategy
- Correct setting technique issues
- In some cases, targeted removal and reset is the right call
Tags:
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