The answer is - indefinitely. How many brick surfaces have you seen that are worn down? Not many! Although bricks that have been installed in the ground for hundreds of years do show signs of wear. For example, in the city of Philadelphia, brick streets, buildings, walls, etc. have been constructed and have lasted for hundreds of years. Horses and buggies traveled across these bricks time and time again, causing wear. Our ancestors produced bricks with the skills of their time. With today's technology, computer-controlled high temperature kilns produce a far superior brick.