Tuckpointing is a type of masonry repair that involves filling in the cracks between bricks with a new mortar. This helps to improve the strength and stability of the wall, as well as its appearance. Tuckpointing is a difficult and meticulous process, but it is important to maintain the integrity of brick buildings.  The most common type of tuckpointing is done with brick walls, but it can also be used on stone and concrete walls.