Ask if they use protective treatments like carpet protector and grout sealant, including longevity, maintenance pointers

https://wiki-view.win/index.php/How_to_Examine_Tile_Cleaning_and_Grout_Cleaning_Pros_Before_You_Book

Ask if they offer protective treatments like carpet protector and grout sealer, including longevity, upkeep suggestions, and service warranty information.