Brick repointing is the process of removing old mortar from brick and replacing it with a new mortar. It usually happens to old bricks and chimneys on building (historical) structures, but there are other instances when adding new mortar is required. However, although brick repointing can be easy and quick to do, it also has its flaws.
What Is Repointing?
Repointing is the process of replacing mortar (a mixture of sand, cement, and water) between bricks or masonry units. This can be done to restore and protect a building's bricks or masonry from moisture damage and future decay. Repointing is also used to correct any minor gaps or cracks in the masonry surface.
There are a few things you need to know before you start repointing:
1. The type of mortar used will affect the repair process. Mortar that is too thick will not allow the bricks or masonry to move freely and may cause more damage than necessary. Mortar that is too thin will not hold the bricks together well and may also cause damage.
2. The height, width, and shape of the cracks or gaps will determine how much mortar needs to be replaced. Smaller cracks that are less than 1/4 inch wide can usually be fixed with a small amount of new mortar; larger cracks that are more than 1/4 inch wide may require a greater amount of new mortar.
3. Repointing should only be done if there is no other alternative available. Or, If the brick or masonry is severely damaged.