Repointing
Repointing is the process of replacing deteriorated mortar between bricks or stones to restore structural integrity and protect against water damage. The process involves raking out old mortar, cleaning the area, and then applying new, matching mortar to fill the joints. Knowledge of the correct materials is crucial for older homes to prevent issues like damp and improve durability.
What is repointing?
Repointing is the refilling of beds and joints on brickwork and is usually undertaken when the previous mortar has weathered away or has been removed because it is unsuitable. Repointing can significantly affect not only the look but also the durability of masonry.
Masonry walls need to be able to regulate water penetration and evaporation. If the condition of the mortar joints is poor or if the wrong mortar has been used for repointing in the past, then this process can be compromised. There are three main reasons for repointing:
- Improve the curb appeal of a property
- Mortar joints are open or weathered back to such an extent that the edge of the bricks are exposed forming a ledge that encourages water to seep into the masonry
- A hard impermeable cement-based mortar has been introduced trapping moisture and accelerating the deterioration of the masonry
Benefits of repointing
Repointing offers multiple benefits for any masonry structure, including improved structural stability and protecting against the elements. It also provides aesthetic and financial advantages, making it a crucial aspect of property maintenance. We have listed below some of the reasons you may want to repoint your home.
- Maintains Structural Integrity: Mortar is vital for holding bricks or stones together and accommodating natural movement. Repointing restores the overall strength and stability of the wall, preventing potential collapse or damage.
- Prevents Water Penetration and Damp: Damaged or crumbling mortar allows water to seep into the walls, leading to internal damp, mould growth, and rot in internal woodwork. Repointing seals these gaps, providing a waterproof barrier and protecting the building's interior.
- Protects Against Frost Damage: In colder weather, water trapped within the masonry can freeze and expand, causing bricks or stones to crack and crumble (known as spalling). Repointing prevents water ingress, protecting the masonry from this freeze-thaw damage.
- Improves Energy Efficiency: By sealing gaps and cracks in the external walls, it reduces drafts and heat loss, contributing to better insulation and thermal performance. This results in a more comfortable indoor environment and lower energy bills.
- Enhances Aesthetic Appeal: Fresh, well-executed repointing can completely transform the appearance of a property, giving it a clean, well-maintained look and enhancing its curb appeal. Different pointing styles can also be used to preserve the original character of older buildings.
- Increases Property Value: A well-maintained exterior and sound structural integrity make a property more attractive to potential buyers, increasing its market value.
- Prevents Costly Future Repairs: Addressing deteriorating mortar early with repointing is a cost-effective preventative measure. Ignoring the issue can lead to much more significant and expensive repairs down the line, such as full wall reconstruction.