You should have a professional installer check the installation for soundness. It may have not been installed properly. The hollow sounding tiles is an indication that areas under the tile are not in contact with the setting bed. These hollow areas have the potential to cause cracking.
TIP If you intend to grind this floor you may crack several tiles. I would be prepared to replace these tiles or try honing or grinding using a light machine.
Article ID: 1057
Created: February 4, 2026
Last Updated: February 4, 2026
Author: Admin
Online URL: https://surfacecarepros.com/kb/article/my-customer-has-mentioned-that-when-she-walks-across-her-marble-floor-wearing-heels-whe-can-hear-a-hollow-sound-under-several-tiles-and-wants-to-know-if-this-is-normal-or-should-she-be-concerned-1057.html