The Complete Guide to Commercial Brick Repointing: When, Why, and How

Brick buildings are a testament to durability and timeless beauty in commercial architecture. However, even the sturdiest structures require maintenance to withstand the test of time. One crucial aspect of brick building upkeep is repointing – a process that can significantly extend the life of your commercial property. In this comprehensive guide, we’ll explore the ins and outs of brick repointing, helping you understand when it’s necessary, why it’s important, and how it’s done.

Signs That Your Commercial Building Needs Repointing

Recognizing the need for repointing early can save you from costly repairs down the line. Here are some telltale signs that your commercial building’s brickwork may need attention:

• Crumbling or missing mortar: If you notice mortar falling out or visible gaps between bricks, it’s time to consider repointing.
• Cracks in the mortar joints: Small cracks can quickly become big problems, allowing water to penetrate and cause further damage.
• Efflorescence: White, powdery deposits on the brick surface indicate that water is moving through the masonry, potentially due to deteriorating mortar.
• Damp interior walls: If the inside of your building shows signs of moisture, failing mortar joints could be the culprit.
• Loose bricks: When mortar fails, bricks can become unstable, posing safety risks and compromising the structure’s integrity.

Regular inspections of your building’s exterior can help you catch these issues early. It’s recommended to have a professional masonry inspection at least once a year, or more frequently for older buildings.

The Repointing Process Explained Step-by-Step

Brick repointing is a meticulous process that requires skill and attention to detail. Here’s a breakdown of the steps involved:

1. Inspection and Assessment: A thorough examination of the brickwork to determine the extent of the damage and the appropriate course of action.
2. Mortar Joint Preparation: The damaged mortar is carefully removed to a depth of at least 3/4 inch or until sound mortar is reached. This is typically done using specialized tools to avoid damaging the surrounding bricks.
3. Cleaning: The joints are cleaned of debris and dust, usually with water or compressed air, to ensure proper adhesion of the new mortar.
4. Mortar Mixing: New mortar is prepared, matching the composition and color of the original as closely as possible (more on this in the next section).
5. Mortar Application: The new mortar is carefully applied to the prepared joints using a pointing trowel or mortar gun. It’s important to fill the joints completely without smearing mortar on the face of the bricks.
6. Tooling: Once the mortar has set slightly, it’s shaped to match the original joint profile using specialized tools. This step is crucial for both aesthetics and functionality.
7. Curing: The new mortar is allowed to cure properly, which may involve covering the work area to protect it from direct sunlight and wind, and misting with water to prevent rapid drying.
8. Clean-up: Any residual mortar on the brick faces is carefully cleaned off to restore the building’s appearance.

This process requires skill and experience to execute properly, which is why it’s generally recommended to hire professional masonry services for commercial repointing projects.

Choosing the Right Mortar for Repointing

Selecting the appropriate mortar is crucial for successful repointing. The new mortar should be compatible with the existing brickwork in terms of strength, composition, and appearance. Here are key factors to consider:

• Mortar Strength: The new mortar should not be stronger than the original. Overly hard mortar can cause the bricks to crack or spall as the building moves and settles.
• Composition: Traditional lime mortars are often best for older buildings, while modern structures may use Portland cement-based mortars. The mix should be tailored to your building’s specific needs.
• Color Matching: The color of the new mortar should blend seamlessly with the existing mortar to maintain the building’s aesthetic integrity.
• Permeability: The mortar should allow for proper moisture movement to prevent trapping water within the wall, which can lead to damage during freeze-thaw cycles.

A professional mason can perform tests on the existing mortar to determine its composition and properties, ensuring that the new mortar is a suitable match.

Benefits of Professional Repointing Services

While DIY repointing might be tempting for small projects, commercial buildings typically require professional expertise. Here’s why hiring a professional repointing service is beneficial:

• Expertise and Experience: Professional masons have the knowledge to assess the condition of your brickwork accurately and recommend the most appropriate solutions.
• Quality Workmanship: Proper repointing requires skill and precision. Professionals have the tools and techniques to ensure a high-quality finish that will last.
• Time and Cost Efficiency: What might take weeks for an inexperienced team can be completed much faster by professionals, minimizing disruption to your business operations.
• Compliance with Regulations: Professional services are familiar with local building codes and historical preservation requirements, ensuring your repointing project meets all necessary standards.
• Comprehensive Service: Many professional services offer additional benefits such as detailed inspections, documentation, and warranties on their work.

Investing in professional repointing services can save you money in the long run by preventing more serious structural issues and extending the life of your building.

Maintaining Repointed Brickwork for Longevity

Once your commercial building has been repointed, proper maintenance is key to ensuring the longevity of the work. Here are some tips for maintaining your repointed brickwork:

• Regular Inspections: Schedule annual inspections to catch any new issues early.
• Keep It Clean: Gently clean your brickwork periodically to remove dirt and pollutants that can degrade mortar over time.
• Address Water Issues: Ensure proper drainage around your building to prevent water from saturating the brickwork.
• Prompt Repairs: Address any new cracks or damage promptly to prevent water infiltration and further deterioration.
• Avoid Harsh Cleaning Methods: Never use high-pressure washing or acidic cleaners on brickwork, as these can damage both bricks and mortar.
• Monitor for Movement: Keep an eye out for signs of building settlement or movement that could stress the mortar joints.

By following these maintenance practices, you can significantly extend the life of your repointed brickwork and protect your investment in your commercial property.

Conclusion

Brick repointing is a vital maintenance task for any commercial building with masonry construction. By understanding the signs that repointing is needed, the process involved, and the importance of choosing the right materials and professionals, you can ensure that your building remains structurally sound and visually appealing for years to come.

Regular inspections, timely repointing, and proper maintenance are key to preserving the integrity and value of your commercial property. When in doubt, always consult with a professional masonry service to assess your building’s needs and provide expert repointing services. With the right care, your brick building can continue to stand as a testament to quality construction and timeless beauty for generations to come.