I've been renovating my father's old garage and it has a driveway of old brick and I was hoping to preserve this look. My mom really loves the driveway the way it is, so I really can't mess this project up. The mortar joints all seem to be uneven and eroded so i was hoping to space them out equally and lay down some grout in between them. I have never laid grout before so if anyone has any comments or suggestions on what is the most convenient method I would appreciate it. I was confused about how much grout to buy and what was required to lay it but I found this video that shed some light on my situation but I could use all the advice I could get.