Repointing
Definition and meaning of Repointing in real estate.
Repointing is the process of removing damaged, deteriorated, or missing mortar from the joints of a brick or stone wall and replacing it with fresh mortar. This maintenance task protects the structural integrity of the masonry by preventing water penetration.
In more detail
Over time, weather exposure causes mortar to crack, crumble, and wash away, leaving masonry units vulnerable to shifting and water damage. If water enters the open joints and freezes, it expands, which can crack the bricks or stones. Repointing involves carefully scraping out the old mortar to a specific depth and packing in new mortar that matches the strength and color of the original.
This is a common requirement for historic properties, where using the wrong type of mortar can cause severe damage to softer, historic bricks. Regular inspection of masonry joints can identify the need for repointing before major structural issues develop.
Key facts
| Category | Property Types & Construction |
|---|---|
| Primary material | Mortar |
| Major risk | Water penetration and freeze-thaw damage |
| Common on | Brick and stone buildings |
A homeowner noticed crumbling mortar lines and loose bricks on their chimney, so they hired a mason to perform repointing to seal the joints and prevent water leaks.
Frequently asked questions
How often does a brick house need repointing?
High-quality mortar joints typically last for decades before they require repointing, depending on weather exposure and the quality of the original installation.
Can I use modern cement mortar to repoint an old brick home?
No, historic homes often require softer lime mortar because modern portland cement is too hard and can cause historic bricks to crack and spall.