Structural Movement Investigation
Investigation and monitoring of structural movement and cracking — tell-tales, level surveys, and engineer assessment to determine the cause before any remediation is specified.

Cracking and movement in a building tell you something is happening — they don't tell you what, or whether it's still going on. That distinction matters, because the cause dictates the cure. A crack driven by seasonal clay movement needs a different response to one driven by a failing footing, a corroding beam, or a one-off settlement that finished years ago. Jumping to a repair before the cause is understood is how owners corporations end up paying to fix the same crack twice.

A structural movement investigation answers the two questions that govern every remediation decision: what is causing the movement, and is it still active. That means observing the structure over time — not just a single visual inspection — using tell-tale crack monitors, precise level surveys, and where warranted, soil and drainage assessment, all interpreted by a structural engineer against AS 3600 (Concrete Structures) and AS 3700 (Masonry Structures).

Atomic Projects runs these investigations as the diagnostic front end to remediation, not as a standalone report that gathers dust. Because we also carry out the structural repairs, the monitoring is framed around the decisions that follow: whether to stabilise the footing, stitch the crack, install a movement joint, or simply confirm the movement has stopped and make good. The goal is a repair specified to the real cause — once.

How We Investigate Structural Movement

  1. Initial Assessment & Crack Mapping
    • Record crack locations, widths, and patterns, and classify the likely mechanism (settlement, heave, thermal, overload, corrosion-induced).
    • Review available drawings and building history to shortlist causes.
  2. Monitoring Installation
    • Install tell-tale crack gauges across representative cracks to measure movement over time.
    • Establish level survey reference points to detect differential settlement or heave.
  3. Monitoring Period
    • Take readings at set intervals across a period long enough to capture seasonal effects — distinguishing active movement from historic, stabilised cracking.
  4. Cause Analysis
    • Where relevant, assess subsurface conditions, drainage, and moisture — the common drivers of footing movement in reactive Sydney clays.
    • Structural engineer interprets the monitoring data to confirm cause and activity.
  5. Findings & Remediation Path
    • Report the cause, whether movement is ongoing, and the recommended remedial approach — with scope documentation for strata decision-making.

What We Investigate

  • Wall & Facade Cracking – Stepped or diagonal cracking in masonry, and cracking around openings.
  • Floor & Slab Movement – Uneven floors, slab settlement, and level changes across a footprint.
  • Sticking Doors & Windows – Frame distortion that signals ongoing structural movement.
  • Post-Event Assessment – Confirming whether movement after storm, excavation, or nearby works is active or finished.

Why Atomic Projects for Movement Investigation

  • Diagnosis Before Repair: We establish cause and activity first, so remediation is specified once and correctly.
  • Engineer-Led Interpretation: Monitoring data is read by a structural engineer against AS 3600 and AS 3700, not guessed from a photo.
  • Straight Line to Remediation: As the builder who carries out the repair, we frame the investigation around the decision it needs to support.

Frequently Asked Questions

Why can't you just tell us the cause from one inspection?

A single inspection can identify the pattern and shortlist likely causes, but it cannot tell you whether the movement is still happening — and that is the critical question. A crack that looks alarming may have stabilised years ago, while a hairline crack may be actively widening. Only monitoring over time, ideally across seasonal cycles, distinguishes active from historic movement. Specifying a repair without that knowledge risks fixing a symptom while the cause keeps working.

How long does structural monitoring take?

It depends on the suspected cause. Movement driven by reactive clay soils is seasonal, so meaningful monitoring often spans several months to capture wet and dry cycles. Where a one-off event is suspected — recent excavation nearby, for instance — a shorter period may confirm whether movement has ceased. We set the monitoring duration to the mechanism in question and advise the expected timeframe at the outset so the owners corporation can plan.

Is a movement investigation worth the cost, or should we just repair the cracks?

Repairing cracks without understanding the cause is frequently a false economy — if the movement is ongoing, the repair reopens and the money is spent twice. A properly scoped investigation is modest relative to the cost of structural remediation, and it ensures whatever repair follows is targeted, correctly sized, and durable. For an owners corporation exercising its duty to maintain common property, it also creates a defensible evidence trail for the decision made.

Does the investigation include an engineer's report we can use for strata?

Yes. The output is a structural engineer's assessment of the cause, whether movement is active, and the recommended remedial path, together with scope documentation the committee can use for decision-making and tendering. Where works exceed the scheme's capital-works threshold, this report supports the general meeting resolution and gives owners a clear basis for the expenditure.

What happens if the monitoring shows the movement has stopped?

That is a valuable outcome — it means the structure has stabilised and the remediation can be limited to repairing and making good the existing damage, rather than the more involved and costly work of arresting ongoing movement. Confirming that movement is historic rather than active can substantially reduce the scope, and we would recommend the appropriate crack repair and finishing to close it out.

Related Services

A movement investigation isn't red tape — it's the step that tells you whether you're chasing a live problem or an old scar, and it stops you paying to fix the same crack twice. As a Class 2 Registered Builder with over 10 years of experience in structural remediation across Sydney, Atomic Projects delivers movement investigations that lead straight to the right repair. Call us on 0410 515 509 or email hello@atomicprojects.com.au to arrange an assessment.

— Ben Tran, General Manager, Atomic Projects