Sudden change, instability, falling material, significant distortion or other safety concerns require prompt assessment by an appropriately qualified professional.
1. Record before interpreting
Mark each crack on a plan and photograph it with a scale and stable reference. Record orientation, length, visible width range, offsets, branching, affected materials and whether the crack passes through finishes, joints or structural elements.
2. Map related symptoms
- Changes in floor or foundation levels.
- Doors, windows, joints or equipment becoming misaligned.
- Rocking, vibration, pumping or hollow response under load.
- Water entry, drainage defects, leaks or erosion indicators.
- Nearby excavation, loading, construction or operational changes.
3. Build a timeline
Use dated photographs, maintenance records, surveys and witness accounts. A single inspection cannot reliably distinguish active, seasonal and historic movement. Monitoring points need consistent locations and methods.
4. Avoid shortcuts
Crack width alone does not establish cause, structural significance or treatment. Cosmetic repair can hide useful evidence, while isolated injection may not address changing support or water pathways.
5. Prepare the assessment brief
Provide plans, structural system, age, alterations, loads, foundation information, ground records, drainage history and the mapped condition. State the decision required: safety review, diagnosis, monitoring, repair design or treatment feasibility.
6. Connect diagnosis to verification
If intervention is proposed, define the target mechanism, affected zone and measurable outcome. Preserve baseline evidence so the post-work condition can be compared honestly.