Why levelling
A height offset, or lippage, quickly appears between two tiles. It is visible, can be felt and is a sign of poor workmanship. Levelling systems press adjacent tiles to the same level.
Especially with large format and uneven substrates, levelling is a must.
The systems
Procedure
Apply adhesive, position the panel, press lightly with a rubber mallet. Place the levelling aid under the joint, align the panel, then tighten. Remove excess after drying.
For large-format tiles, also spread the adhesive with a vibrating tool so that no voids are left.
Avoid mistakes
This guide is editorial and general. For safety questions the manufacturer datasheet applies.