Sorry if this is a silly question, we’ve never had any proper work done so a bit clueless. But just wondering if this is the case? As I guess you can’t walk on it?! We have a big dog who roams freely and sheds hair ridiculously which I imagine isn’t the best for grout.. the hallway is a fairly large victorian terrace shape, around 8m2 and we’re having quarry tiles with a border done so I imagine it not being the quickest job but yet to get quotes/idea of timescale.