What does floor preparation include?
Floor preparation can include removing residue, checking flatness, cleaning dust, addressing cracks and deciding whether the surface can bond with the tile system.
If old tile or flooring is still in the way, tile removal and demolition may come first. If the issue is structural movement or weak panels, subfloor preparation for tile is the deeper question.
Renan looks at the actual exposed surface instead of assuming mortar can solve every problem while tile is being set.

