Typical signs
- Vertical, diagonal or horizontal cracks.
- Surface displacement, sticking doors, sloped floors or repeated new cracks.
Where it is often found
- Foundations, masonry, slabs, basement walls, exterior walls and sometimes interior ceilings.
What it can mean
- Shrinkage of concrete or mortar without major structural consequence.
- Settlement, soil pressure, freeze-thaw, drainage issues or overload.
What to check next
- Measure width and take dated photos.
- Note displacement, progression, season and any water.
- Compare inside/outside and check site drainage.
Reasonable immediate actions
- Do not hide it without monitoring. Relieve point loads if an element is clearly overloaded.
When to stop and call a professional
- Horizontal cracking, bowing wall, clear displacement, rapid progression, load-bearing involvement or active water.
Prevention
- Control surface water, maintain downspouts, correct grading and avoid unverified load changes.