Tips1 min read
Cracks in a building: when to worry and when not to
Not every crack is dangerous. Its shape, direction and location tell you whether it is plaster or a foundation problem.
Eng. Ahmed El-Shennawy
Structural engineer · NSCO Construction
The short answer: fine hairline cracks in plaster are normal and not dangerous. What needs an inspection now is a diagonal crack in a column or beam, a crack that widens over time, or one that appears in the same place on more than one floor.
How do you tell the two apart?
| Sign | Plaster crack | Structural crack |
|---|---|---|
| Width | Hairline | Visible and widening |
| Direction | Random or horizontal | Usually diagonal, around 45° |
| Location | Wall face | Column, beam or opening corner |
Frequently asked questions on this topic
01Is a hairline crack in plaster dangerous?
Usually not. It comes from plaster shrinkage or temperature movement and is dealt with during ordinary finishing work.
02Can I add a floor to the building?
That answer comes from a structural inspection of the foundations and columns, not a contractor opinion. Sometimes it is possible after strengthening.
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