If a few individual bricks are spalling or cracked we can tooth them out and replace them (Inlay). You want to do this as soon as you notice a problem. Once issues go untreated for any length of time and a majority of the brick becomes compromised, the whole structure needs to be rebuilt (in most cases).
These large jobs can be avoided and a lot of money can be saved just by being proactive and replacing bad brick (Inlay) as soon as you see them.