When working on building sites or performing inspections, encountering cracks in concrete can be cause for concern. However, not every crack signals the same issue.
Here’s a guide for professionals and enthusiasts alike to help distinguish four main kinds of concrete cracks:
- Micro/Hairline-Cracks
These are extremely slim fissures that develop near the surface, usually soon after the concrete hardens. Although subtle, they often hint at underlying stress or too-quick moisture loss during curing. - Drying Cracks
As concrete sets and moisture evaporates, irregular cracks may appear. Known as drying or shrinkage cracks, their frequency can be significantly reduced by ensuring that proper curing techniques are followed. - Foundation Settlement Cracks
If the underlying soil shifts or settles unevenly, concrete above can crack—sometimes even resulting in one section dropping lower than another. Such settlement cracks may undermine the stability of the structure if not addressed promptly. - Load-Bearing Cracks
Wide, penetrating cracks typically point to excessive loads, inadequacies in design, or failure in the foundations supporting the structure. These cracks are critical and require urgent structural assessment and remediation.
Recognizing each crack type is key to ensuring the resilience and safety of any construction project—prompt action helps prevent minor issues from becoming serious structural hazards.
Source: Feras Abulabbeh, BSc.Arch/Linkedin