Hello everyone, I wasn't entirely sure where to post this thread, but here it goes..
My parents got their bathroom remodeled a few months ago. This is the first house they've ever owned, and therefore the first remodel they've ever had to do. So they didn't know what to look for when the guy was done. Anyway, in the process of sealing the grout I noticed spots of grout missing between the shower tiles.
I read somewhere that the only way to fill in spots w/o grout was to remove all the grout entirely! Is this true? Or can we simply find out what grout was used and fill in the holes ourselves?