Tile Warpage and Levelling Systems

One of the main reasons tile levelling systems have become so widely used is that they help minimise the effect of tile warpage.

During the manufacturing process, tiles are fired at temperatures exceeding 1,200°C. As they cool, very slight curvature can naturally occur. This is known as warpage or bowing.

Although modern manufacturing keeps these tolerances extremely small and within recognised industry standards, even minor curvature can become noticeable with today's large-format and rectified tiles, particularly when narrow grout joints are used.

How Levelling Systems Work

Tile levelling systems help pull neighbouring tiles into the same plane while the adhesive cures, reducing visible lippage caused by these slight manufacturing tolerances.

When Are Levelling Systems Most Useful?

For this reason, levelling systems are particularly popular when installing:

• Large-format porcelain tiles.
• Long plank wood effect tiles.
• Rectified tiles.
• Thin porcelain panels.

Bond Offset and Warpage

Many manufacturers also recommend limiting the offset of long rectangular tiles, such as using a one-third bond rather than a half bond, as this helps reduce the visual effect of any natural warpage.