If cracks appear in the walls, it is often a sign of problems with the base or damage. Often the problem is caused by shrinkage of the bed, expansion of the soil, or sedimentation. Earthquakes can also cause cracks.
When a crack occurs, its size and shape say a lot about the problem. This ability to "read" can help you determine the seriousness of the situation and the action to take. You can also get professional help for ‘foundation crack repair’ (also known as ‘rparation de fissures de fondation’ in the French Language).
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It is not uncommon for a concrete foundation to experience small cracks, which may indicate the need to repair the concrete foundation. This is because concrete shrinks as it hardens. Hardening is not only due to loss of water, but also chemical reactions. The amount of shrinkage depends on many factors, such as: the type of concrete used, the temperature at the time of pouring and the amount of water used.
These are usually thin vertical cracks that occur randomly across the base. Their length can vary from a few centimeters to the entire height of the wall. When concrete isn't mixed properly or poorly, cracks tend to get bigger. The rate and characteristics of the cracks can also be affected by the use (or lack of) the steel reinforcement. The shrinkage cracks usually stop after the concrete hardens.
Cracks in the foundation that occur in old buildings should be more of a problem. Pay special attention to the vertical cracks in the walls, which will grow significantly larger in a short time. Although cracks can be caused by build-up, they can also be an indicator of a more serious foundation problem. Cracks that are wider at the top and bottom can also be dangerous, especially if you can find them near the edge of a wall.