A visual inspection can document visible symptoms. It cannot confirm every concealed condition. When the cause, extent, substrate or junction detail remains uncertain, controlled opening-up or another targeted investigation method may be considered before a final remedial scope is set.
Neither method is automatically “better”. The right level of investigation depends on what must be known to define, design, price and safely deliver the proposed work. A preliminary visual inspection may be enough to identify a symptom and set the next step. It may not be enough to convert concealed assumptions into a reliable construction scope.
Records accessible surface conditions without intentionally removing finishes or components.
Intentionally exposes or samples a limited location to answer a defined question about concealed construction.
Further investigation may be worth considering when a material scope decision depends on something the surface evidence cannot confirm. The examples below are prompts for the project team, not universal rules.
| Project question | What visual evidence can do | Why further investigation may be considered |
|---|---|---|
| What is causing the symptom? | Map the pattern, severity and accessible surrounding conditions. | The same surface symptom can have different concealed causes, and the repair approach may change with the cause. |
| How far does the defect extend? | Define the visible boundary and repeat observations over accessible areas. | Deterioration, moisture or failed interfaces may extend beyond what is visible at the surface. |
| What substrate or build-up is present? | Compare drawings, records and visible junctions. | Records can be missing, generic or inconsistent with the as-built condition; the proposed detail may rely on actual layers and dimensions. |
| Will the proposed repair connect to a sound edge? | Identify apparent boundaries and accessible condition. | A repair quantity, termination or fixing strategy may depend on the concealed condition at the proposed edge. |
| Why did an earlier repair fail? | Record the current failure pattern and maintenance history. | Repeated failure can indicate that the prior treatment addressed the symptom rather than the mechanism or interface. |
| Is there a safety, structural or hazardous-material uncertainty? | Identify warning signs and stop unsafe access. | The appropriate engineer, competent person or specialist may require controlled evidence before advising the next step. |
Review available drawings, defect reports, repair history, warranties, maintenance records and previous test results before selecting new investigation points.
Agree what finding will confirm the assumption, require a changed method, or justify extending the investigation. This limits unnecessary disturbance.
Where uncertainty remains, identify assumptions and provisional items clearly instead of presenting an unverified quantity or detail as fixed.
Urgent make-safe work and subsequent permanent remediation may have different statutory and design requirements. The current Building Commission NSW remedial building work guidance explains requirements for regulated buildings and practitioner roles.
The record should let a later reviewer understand where the investigation occurred, what was exposed, what method was used, what remained uncertain and how the area was left.
Record what was physically seen or measured, then identify any professional interpretation separately. This keeps the evidence usable if the remedial approach changes.
An investigation can reduce uncertainty without eliminating it. State residual limitations and assumptions so they are not lost when the final scope is priced or delivered. A sound opening in one location does not establish that a different elevation, construction stage or previous repair has the same condition. Record why each location was selected and what finding would justify further investigation; do not turn a sample into an unsupported whole-building conclusion.
At Surry Hills, SCE delivered structural assessment and investigations, a remediation specification, an engineering inspection report, remediation design and tender process management with specialist engineering consultants. The documented observations included stepped brickwork cracking, alignment checks, soffit-junction separation and localised masonry opening-up. Together, the investigation and professional deliverables established a technical basis for the Owners Corporation’s remediation tender.
Opening-up affects more than the inspection team. It can change access, resident amenity, common property, waterproofing, structure, fire or acoustic separation, security and reinstatement responsibilities.
Confirms the affected property and authority to proceed, approves the budget and scope, supplies records, identifies decision-makers and agrees who is responsible for make-good and ongoing maintenance.
Coordinates access, notices, keys, inductions, residents or tenants, by-laws, working hours, common-area protection, shutdowns and the retained building record.
Where the questions involve engineering judgement, regulated design, hazardous materials, certification or another specialist field, the suitably qualified or registered practitioner determines the requirements within that role.
Implements the agreed method, access and controls; records the exposed condition; observes hold points; makes the area safe; and completes the agreed temporary or permanent reinstatement.
Performs any separate statutory approval, certification or regulatory function where the applicable pathway requires it. These functions should not be implied to sit with the investigation contractor.
Check the scheme’s by-laws and speak with the owners corporation, strata committee or strata manager. NSW guidance distinguishes cosmetic, minor and major renovations and notes that work affecting structure, waterproofing, ceilings or common property can require different approval steps.
Review asbestos information and the proposed disturbance with the competent project team. SafeWork NSW guidance addresses asbestos registers, competent-person identification and controls before demolition or refurbishment work, including residential premises.
SCE delivers and coordinates building investigation, engineering and design inputs, controlled opening-up, access, make-safe and reinstatement within the agreed project scope. The appropriately qualified or registered practitioner undertakes each specialist assessment, regulated design or declaration; certification and authority decisions retain their separate responsibilities. This guide explains planning decisions and does not constitute a site-specific investigation method or professional opinion.
Update details, quantities and interfaces with the verified condition. Keep remaining assumptions and exclusions visible.
Identify any further test, practitioner input, design update or owner approval required before construction proceeds.
Carry the evidence into access planning, sequencing, procurement, protection, quality records and handover requirements.
To organise the initial information and next steps, use SCE’s Remedial Planning Tool. Explore SCE’s Building Remedial Services, Building Reports and Engineering Services for investigation, reporting and remedial delivery.
Sometimes. It may support a preliminary scope when accessible evidence, records and the proposed repair are consistent and the appropriate project team considers the remaining uncertainty acceptable. It cannot verify every concealed condition, so material assumptions should be stated.
It is a controlled activity that intentionally exposes or samples a limited part of a building to answer a defined project question about concealed construction. It may include local removal of a finish, a small opening, lifting a component or taking a sample, with safety and reinstatement planned.
No. Opening-up is not a universal requirement. Records review, monitoring, measurements, scanning, non-destructive testing or other specialist methods may provide sufficient evidence with less disturbance. The method and extent should be project-specific.
The appropriate project team should decide based on the questions, risks and professional roles involved. Engineering, regulated design, hazardous-materials or certification questions should be directed to the suitably qualified or registered practitioner for that role.
Confirm authority and approvals, by-laws, access and resident notices, building records, competent people, hazardous-materials information, live-service controls, containment, working hours, weather protection, make-safe requirements and who is responsible for reinstatement.
Record the findings in a location-based evidence and decision log, replace assumptions with verified measurements or build-ups, update designs and quantities where required, identify residual uncertainty, and carry the decisions into access, sequencing, quality and handover requirements.
Primary-source links were checked on 2 September 2026. Requirements depend on the building, work classification, location and project circumstances; confirm the current pathway for the actual work.
Share the available records, known symptoms, access constraints and the decisions your project team needs the investigation to support.
Last reviewed: 5 October 2026. General information only; obtain project-specific advice from the appropriate practitioners and authorities.
