Looking for advice for kitchen flooring, I love these tiles https://www.wickes.co.uk/Wickes-Calacatta-Charm-Polished-Porcelain-Wall+Floor-Tile---600-x-600mm/p/277962
however the main traffic area of the kitchen will be over floorboards and some is solid floor, Im aware you can have it boarded over but really don't want the grout to fail, even with flexi grout would this happen. Any advice please Thanks.