What should be done to prepare a surface before tile installation?

Preparing a surface before tile installation is a critical step to ensure proper adhesion and the longevity of the tile. Ensuring that the surface is clean and level is essential for several reasons.

A clean surface prevents any debris or contaminants from interfering with the adhesion of the tile to the substrate. Dust, dirt, and grease can cause tiles to loosen or crack over time, leading to costly repairs. It is recommended to sweep, vacuum, or use a damp cloth to remove any particles before installation.

Leveling the surface is crucial as uneven substrates can lead to lippage, where the edges of adjacent tiles are not aligned, creating an unprofessional finish and potentially causing trip hazards. If the surface is not level, proper leveling compounds or techniques should be employed prior to installation to create a uniform area for the tiles.

While other options may be considered, they do not adequately address the necessary preparations required for tile installation. Applying paint, for instance, could create a barrier to adhesion, while moistening the surface might lead to uneven installations if done improperly. Leaving the surface as is disregards the importance of a prepared substrate and could result in insufficient tile support. Thus, ensuring the surface is clean and level is fundamental to a successful tile installation.