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To identify cracks or to see how we work, it is always interesting to compare with what has already been done.
RECOGNIZE TYPES OF CRACKS
Before the start of any work, it is important to determine the type of cracks previously identified in order to perform an adequate intervention. This step is even more important when the presence of cracks is the only indication of a foundation problem since the work necessary to repair passive cracks is less important than those required to correct active cracks. In addition, a simple visual inspection does not distinguish a passive crack from an active crack.
Passive cracks are usually due to concrete removal (dewatering) or premature backfilling during new construction. They can also be caused by the retraction of clay soil unexpectedly. They stabilize after a year or two, without having a negative impact on the building. In the majority of cases, they are of minor importance, but must still be clogged.
Active cracks are much more harmful than passive ones. The word “active” is used since they do not stabilize over time. They tend to get worse and cause a variety of problems for the entire building. In order to repair them, in addition to being clogged, the installation of piles is often necessary.
HOW TO ESTABLISH A DIAGNOSIS?
First, measure the width of a crack and make a mark on the foundations or install control strips. Different types of control strips, ranging from the simple glass plate to the graduated band in both axes, are available. In the months following the installation, a second data collection is carried out, making it possible to check if there has been movement.
Need to repair a crack?
You can write to us or call us. It will be a pleasure to help you.