How to identify the cause of a crack in a brick wall? (2024 Guide)

How to Identify the Cause of a Brick Wall Crack

Have you ever found yourself staring at cracks forming on the brick walls of your home in Montreal, Laval, Longueuil, South Shore, or North Shore, wondering why they appeared and if they pose a serious problem? If so, don't worry; you're not alone. Cracks in brick walls are a common issue, but it's crucial to understand their origin to take the appropriate repair and maintenance measures. In this article, we'll dive deep to help you identify the causes of cracks in a brick wall.

Types of Cracks

Before delving into the causes, it's important to understand the different types of cracks you might encounter on your brick wall. Each type of crack can have a different origin, making it crucial to differentiate them. Here are some of the most common types:

1. Shrinkage Cracks

These cracks typically appear when the mortar used to bond the bricks dries and contracts. They are usually thin and vertical.

2. Tension Cracks

Tension cracks form due to the tension exerted on the wall, often caused by temperature variations or ground movements. They can be diagonal and thicker than shrinkage cracks.

3. Compression Cracks

Compression cracks are caused by excessive pressure on the wall, such as the weight of the upper floors of the house. They are typically horizontal and can be a sign of severe structural issues.

4. Movement Cracks

These cracks result from ground movements, such as landslides or subsidence. They can vary in size and direction.

Now that we've identified the types of cracks, let's examine the possible causes for each of them.

Causes of Cracks in a Brick Wall

1. Extreme Weather Conditions

Extreme weather conditions, such as repeated freezing and thawing, can lead to shrinkage cracks in brick walls. The cycles of freezing and thawing cause materials to expand and contract, creating tension on the bricks and mortar.

2. Soil Movements

If your home is built on unstable soil, soil movements can occur. These movements exert pressure on your home's foundations, leading to tension or compression cracks in the brick walls.

3. Poor Installation

Low-quality brick installation can also be the cause of cracks. Improper mortar mixing, misaligned bricks, or poorly executed joints can result in shrinkage cracks.

4. Structural Issues

Horizontal compression cracks can indicate severe structural problems, such as foundation settling or excessive load on the wall. These issues require immediate attention from masonry professionals.

5. Water Infiltration

Water can be a formidable enemy to brick walls. Water infiltration through existing cracks can worsen the problem by causing additional damage.

6. Earthquakes

While less common in Montreal and its surroundings, earthquakes can cause cracks in brick walls. These cracks are typically diagonal and should be assessed by masonry experts.

What to Do If You Identify a Crack?

Now that you've identified the likely cause of the crack in your brick wall, what should you do next?

1. Consult a Professional: The first step should always be to seek the assistance of a masonry professional. They can assess the situation and determine the severity of the crack.

2. Appropriate Repair: Depending on the cause of the crack, the professional will recommend the best repair method. This may involve repointing, structural reinforcement, sealing, or other tailored solutions.

3. Prevention: Once the crack is repaired, ensure you take steps to prevent its recurrence. This could include improving rainwater management, addressing foundation issues, or regular maintenance.

Conclusion

Identifying the cause of a crack in a brick wall is crucial for effective repair. Cracks can have various origins, ranging from weather conditions to structural problems. If you identify a crack in your brick wall in Montreal, Laval, Longueuil, South Shore, or North Shore, don't hesitate to contact our team of masonry professionals at Masonry Montreal. We have the expertise to diagnose the crack's cause and carry out the appropriate repairs. Don't let cracks worsen; contact us today for a sturdy and secure brick wall.