What is Lippage in Tile Flooring?

Tile lippage refers to when installed tiles end up at slightly different heights, creating ledges or "lips" between them. Acceptable lippage is 1/32 inch or less in variation. More than that and you have tiles noticeably out of flush with uneven grout line gaps.

What Causes Lippage in Tiled Floors?

Common installation issues that create lippage include:

• Uneven substrate - High and low spots telegraph through tiles.
• Inconsistent tile sizes - Thickness variations prevent flushness.
• Poor use of leveling systems - Improper leveling and spacing.
• Inadequate planning and layout - Especially with large tiles.
• Insufficient mortar - Allows tiles to shift and move.

• Loading tiles prematurely - Putting weight before cured.

• Tips to Prevent Lippage in Tile.
  

To ensure tiles are flush without lippage:

• Start with flat substrate - Level or use self-leveling compounds.
• Check and calibrate tile thickness before installing.
• Use tile leveling systems properly - Lippage removers and spacers.
• Lay out thoughtful installation patterns.
• Apply mortar generously - Full coverage without voids or gaps.

• Allow mortar to fully cure before walking on tiles.

With care and attention during installation, it's possible to end up with a beautifully flush tile floor free of problematic lippage.