What makes a tile floor last as an assembly?
A tile floor depends on structure, prep, underlayment, mortar coverage, movement details and the tile selected.
If the floor below moves, dips or carries old damage, the tile surface will usually show it through cracked grout, hollow sounds or lippage. That is why prep work, subfloor checks and leveling compound are not cosmetic steps.
Laura T. wrote that Renan delivered floor-to-ceiling tile with not one imperfection and cared about his work. Floors need that same attention before the visible tile starts.

