Les fissures dans les murs de briques sont-elles dangereuses?
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Are cracks in brick walls dangerous?

Understanding the Dangers of Cracks in Brick Walls by Maçonnerie Montréal

Types of Cracks in Brick Walls

Cracks in brick walls can be classified into various types, each with its own level of danger:

1. Hairline Cracks

Hairline cracks are typically thin and shallow, resulting from natural settling or minor movements in the building's foundation. These cracks are generally not dangerous and can be easily repaired with proper maintenance.

2. Stair-Step Cracks

Stair-step cracks follow the mortar joints in a brick wall, resembling a staircase pattern. They can be caused by differential settlement, thermal expansion, or other factors. While some stair-step cracks are harmless, others can indicate a more serious issue requiring immediate attention.

3. Horizontal Cracks

Horizontal cracks are generally more concerning, as they can indicate significant structural damage. These cracks often result from excessive lateral pressure, such as from soil expansion or foundation movement, and may require extensive repairs.

4. Vertical Cracks

Vertical cracks can be caused by a variety of factors, including differential settlement, thermal movement, or structural issues. The danger associated with vertical cracks depends on their size, depth, and location within the wall.

Identifying Dangerous Cracks

When determining whether a crack in a brick wall is dangerous, consider the following factors:

1. Size and Depth

Cracks that are wider than 1/8-inch (3 mm) or penetrate more than half the thickness of the brick wall may indicate a more serious issue and should be inspected by a professional.

2. Location

Cracks near windows, doors, or other openings in the wall can be more concerning, as they may compromise the structural integrity of the building.

3. Growth and Movement

If a crack in a brick wall is growing or widening over time, it may indicate an ongoing issue that requires immediate attention.

Why Choose Maçonnerie Montréal for Masonry Repairs

Maçonnerie Montréal is a trusted name in masonry services in the Greater Montreal area, providing expert solutions for brick wall crack repairs and maintenance. Our team offers:

1. Experience and Expertise

With years of experience in the industry, our skilled professionals have the knowledge and expertise to address a wide range of masonry issues, including identifying and repairing dangerous cracks in brick walls.

2. Quality Workmanship

We take pride in our work and strive to provide the highest level of workmanship, ensuring that your brick walls are repaired efficiently and effectively.

3. Customer Satisfaction

At Maçonnerie Montréal, we prioritize customer satisfaction, working closely with our clients to meet their needs and exceed their expectations.

Maintaining Your Brick Walls

Proper maintenance and preventive measures can help minimize the risk of dangerous cracks in your brick walls. Maçonnerie Montréal recommends:

1. Regular Inspections

Conduct regular inspections of your brick walls to quickly identify signs of cracking or other issues, allowing for timely repairs and reducing the risk of more extensive damage.

2. Proper Drainage

Ensure adequate drainage around your building to prevent moisture from damaging your foundations and brick walls. This includes maintaining gutters, downspouts, and grading around the building.

3. Quality Materials

Using high-quality materials, such as corrosion-resistant wall ties and proper lintels, can help prevent issues that lead to dangerous cracks in brick walls.

4. Professional Installation

Hiring professionals like Maçonnerie Montréal for your masonry work ensures proper installation techniques and adherence to building codes, reducing the risk of dangerous cracks in your brick walls.


Not all cracks in brick walls are dangerous, but it is crucial to identify and address potentially hazardous cracks to maintain a safe and stable structure. Trust Maçonnerie Montréal for expert masonry repairs and maintenance.

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