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For various reasons, cracks may appear in the exterior walls or load-bearing walls. These can be more or less serious. Anyway, it is necessary to call a professional as soon as possible to evaluate the situation. After diagnosis, the specialist will propose appropriate solutions to repair the damage and / or to slow down the evolution of the crack.

Cracks on exterior wall

Cracks on exterior wall

Cracked exterior walls

The appearance of cracks on an outside wall (on the facade of a house for example) is a problem that appears frequently in buildings, especially in older ones. These can take several forms: vertical, horizontal, diagonal or zigzag. Whatever their appearance, the presence of these cracks should never be neglected because they are the sign of another problem more or less serious. The causes may be a field movement, a moisture problem or the consequence of poor workmanship at the time of construction of the building.

The different types of crack

Identifying the nature of a crack found at an exterior wall is essential to assess risks and adopt the appropriate solution. Three main types of exterior wall cracks can be distinguished.

  • Microcrack

It is very thin and touches only the surface of the wall. This is usually a superficial problem touching only the coating. Even if the microcrack does not present any particular risk for the wall, it is essential to repair it to avoid the infiltration of water which itself can cause moisture concerns.

  • Fine cracks

With a width of 1 to 2 millimeters, it is necessary to check the evolution of small cracks. For this, the professional sets up two or three witnesses. If they remain intact after a few months, they are stable cracks that can be blocked by taking into account the nature of the walls. In case of cracking of the controls, it is essential to clearly identify the origin of the degradation and eliminate it.

  • The cracks

If the width exceeds two centimeters, we can say that the situation is serious. Different causes can be diagnosed as a movement of ground or a subsidence. In this case, it is unfortunately a problem that has settled over the years and requires radical treatment. After verification, the specialist in masonry / plastering will have to restore the walls by a consolidation, or even a change thereof.

Whatever the level of gravity of a crack on an exterior wall, the mere presence of it must motivate the call of a professional in the matter. Before contacting a specialist, it is recommended to compare several quotes to select the most interesting and the most suitable service.

On the same subject:

  • Cracks on the facade of a house: what solutions?
  • All about facade remodeling


Video Instruction: Fix structural cracks on plaster walls