Comment puis-je savoir si une fissure de linteau est due à un mouvement structurel?
Reading time: 3'

How can I tell if a lintel crack is due to structural movement?

How Can I Tell if a Lintel Crack Is Due to Structural Movement? - Maçonnerie Montréal's Expert Guide

At Maçonnerie Montréal, we understand the intricacies of masonry and the significant role that lintels play in the structural integrity of a building. In this article, we delve into how to tell if a lintel crack is due to structural movement. We offer a comprehensive range of services across Montreal, with a particular focus on repairing cracked lintels.

Understanding Lintels and Their Role in Structures

Lintels are integral to the structure of any building. They are horizontal blocks that span the space or opening between two vertical supports, commonly found above windows and doors. Lintels are essential in transferring the load from above the opening to the supports at the sides.

The Implications of Structural Movement on Lintel Integrity

Structural movement can impose significant stress on lintels, leading to cracks and, if not addressed, even failure. Here, we look at several factors related to structural movement that can negatively affect lintel integrity:

  • Settlement or subsidence: When a building's foundations move due to soil-related factors or the structure's weight, this can cause vertical structural movement. Over time, this movement can lead to lintel cracks.
  • Thermal expansion and contraction: As building materials heat up and cool down, they can expand and contract. These changes can cause horizontal structural movement, leading to cracks in lintels.
  • Differential movement: When different parts of a building move at different rates (often because they are made of different materials), this can cause lintel cracks.

Identifying Signs of Structural Movement-Related Lintel Cracks

Determining whether a lintel crack is due to structural movement requires keen observation and expertise. Here are the signs you need to watch out for:

  • Step cracking: This refers to diagonal cracking following the mortar joints in a stepped pattern. It's usually a sign of differential movement or settlement.
  • Horizontal cracking: This may indicate thermal expansion, especially if the crack is wide and uniform along its length.
  • Expanding or widening cracks: If cracks widen over time or during specific conditions (like dry or wet weather), it can be a sign of ongoing structural movement.
  • Cracks with displacement: If one side of the crack is displaced relative to the other, this can indicate significant structural movement.

The Importance of Professional Assessment and Intervention

While homeowners can identify some signs of structural movement-related lintel cracks, a professional assessment is necessary to confirm the diagnosis and devise an effective solution. At Maçonnerie Montréal, we provide:

  • Expert assessments: Our masons have the knowledge and experience to correctly identify the signs of structural movement and understand their implications.
  • Effective interventions: Once we have identified the issue, we provide efficient and effective solutions, from masonry reinforcement to lintel replacement.

Trust Maçonnerie Montréal with Your Lintel Concerns

Maçonnerie Montréal offers professional lintel services, from installation to repair, that ensure the long-term structural integrity of your building. We're here to address all your lintel concerns.


Understanding the relationship between structural movement and lintel integrity can help preserve the lifespan of your building and save you significant repair costs down the line. At Maçonnerie Montréal, we bring our expertise, skills, and commitment to every project, ensuring peace of mind and the safety of your building.