Peer Review & Testing

Independent Engineering
Peer Review & Testing

Third-party review of structural, facade and waterproofing designs prepared by others. Witnessed testing — membrane integrity, flood, water-spray, adhesion — backed by signed compliance reports for builders, certifiers, insurers and strata.

Request a Peer Review 0434 283 703
CPEng Chartered Professional Engineer
Independent No Manufacturer Relationships
Engineer reviewing structural drawings with red-pen mark-ups Third-Party Verification
Why It Matters

Verification Is the Cheapest Insurance in Construction

A peer review or witnessed test costs a fraction of one defect rectification — yet most projects skip it. Here's the failure pattern, and where independent verification breaks the cycle.

Single-Engineer Error Goes Unchecked

Even a competent design engineer makes errors. Without an independent second opinion, a missed load combination, an under-sized member or a non-compliant fixing detail goes to site. Construction proceeds. The defect surfaces years later when the warranty has expired.

Testing Done But Not Witnessed

Most installer-witnessed tests pass. Most independently-witnessed tests reveal something — a low DFT in one bay, a leaking lap in one corner, an undersized fixing at one location. The cost of an independent witness is far less than the cost of finding the failure in service.

Certifier Pressure Without Engineering Backing

Builders and developers often face certifier pressure to produce sign-offs they can't fully verify themselves. An independent peer review or test report gives the certifier defensible third-party evidence — and the builder a clean record if the project is ever disputed.

What We Do

Peer Review, Inspection & Testing Services

Third-party engineering verification across structural, facade, waterproofing, stormwater and remedial scopes — independent of the original designer.

Structural Peer Review

Independent review of structural design documentation — load paths, member sizing, connection design, geotechnical interpretation and code compliance — for projects ranging from individual dwellings to high-rise.

  • Member sizing & load path audit
  • Connection & fixing capacity review
  • Geotechnical interpretation review
  • AS 1170 / AS 3600 / AS 4100 compliance

Facade & Cladding Peer Review

Independent assessment of facade engineering documentation — wind pressures, Performance Solution logic, fixing design and combustibility compliance — including A2G2 expert judgement reviews.

  • Wind pressure verification (Kl, Kr)
  • Performance Solution logic review
  • Fixing & restraint capacity audit
  • Combustibility & A2G2 review

Waterproofing Design Review

Audit of waterproofing specifications and details against AS 3740, AS 4654.1/.2 and BS 8102 — including termination heights, fall design, system selection and detail buildability.

  • AS 4654.2 Table A1 termination verification
  • Fall & drainage design audit
  • System selection & substrate compatibility
  • Detail buildability review

Witnessed Membrane & Flood Testing

On-site witnessing of waterproofing acceptance tests — flood tests to AS 4654.2, water-spray testing to AS 4284, electronic leak detection — with signed test certificates.

  • AS 4654.2 flood test witnessing
  • AS 4284 water penetration testing
  • Electronic leak detection
  • Signed test certificates

DFT, Adhesion & Bond Testing

Field measurement of dry-film thickness, adhesion bond strength, and pull-off testing for waterproofing membranes, anchor systems and stone cladding — to AS / ISO standards.

  • Dry-film thickness verification
  • Pull-off bond testing (AS 4858)
  • Anchor pull-out testing (AS 5216)
  • Stone veneer bond strength

Hold-Point & Stage Inspections

Staged inspections across structural and waterproofing construction — substrate prep, formwork, reinforcement, membrane application, finishings — with photo-documented compliance reports.

  • Pre-pour reinforcement inspection
  • Substrate & bond-breaker inspection
  • Membrane & DFT inspection
  • Pre-handover defects inspection
Our Process

How We Work

Brief, audit, report, support. A predictable engagement structure.

1

Brief & Documentation

We collect the documentation under review — drawings, calculations, specifications, test data — and confirm the review scope and fixed-fee within 24 hours.

2

Independent Audit

Our reviewing engineer (not involved in the original design) audits the package against the relevant Australian Standards and project conditions — with full calculation re-checks where required.

3

Findings Report

Clear written report with findings categorised as compliant / minor non-conformance / major non-conformance, each with the specific clause reference and recommended action.

4

Resolution Support

We work with the original designer to resolve any non-conformances and re-issue the review once corrections are in place — usually inside a week.

Real Projects

Selected Peer Review & Testing Projects

Independent verification work we've completed for developers, builders, councils and owners corporations.

Crown high-rise structural peer review Structural Peer Review · Sydney CBD

18-Storey Residential — Structural Peer Review

A developer engaged us for independent peer review of the structural package on an 18-storey residential build. Two issues surfaced: a transfer beam was sized for the dead-plus-live combination but not the full earthquake load combination, and the lift core wall reinforcement schedule was light by 8% in one zone.

Both issues corrected pre-construction. Developer recovered the peer review fee many times over avoiding rectification at concrete stage.
Liverpool tavern facade combustibility audit Facade Peer Review · Liverpool

Cladding Combustibility & PS Logic Audit

A certifier wanted a second opinion on a Performance Solution covering a recently-replaced ACP cladding system on a hospitality building. We re-derived the wind pressures from first principles (the original PS had used the wrong directional multiplier), re-ran F3V1a and confirmed the CodeMark verification chain was sound.

Wind pressures corrected; PS amended and re-issued. Certifier signed off with the documented peer review on file.
Sutherland strata podium witnessed flood test Witnessed Testing · Sutherland

Podium Flood Test — 8 of 12 Cells Failed

An owners corporation requested independent witnessing of post-remediation flood tests across a 12-cell podium. Eight cells failed the AS 4654.2 acceptance test. The original contractor had only self-tested two cells, both of which had passed.

Contractor returned to rectify the eight failed cells. OC saved an estimated $180k in future leak rectifications by catching the failure before tile installation.
Cronulla building waterproofing design review Waterproofing Review · Cronulla

Coastal Apartment Waterproofing Spec — Wind Class Override

A waterproofing design for a coastal apartment build specified 150 mm upturns universally. The site is C2 wind class — AS 4654.2 Table A1 requires 70 mm for C1 (N3) but 100 mm for C2 (N4). The design also missed a key drainage detail at the threshold of the principal balcony.

Design re-issued with correct upturn heights and drainage. Construction proceeded without certifier RFI.
Who We Help

Independent Verification for Every Stakeholder

Trusted by the parties who can't afford to be wrong.

Owners Corporations & Strata Managers

Common property scopes, capital works planning, defect investigations and compliance certification for Class 2 buildings.

Builders & Developers

Design declarations, Performance Solutions, certification packages and staged inspections — built to satisfy the certifier on the first submission.

Architects & Consultants

Specialist engineering input on facade, waterproofing and structural elements where Deemed-to-Satisfy provisions don't apply.

Homeowners & Investors

Practical engineering advice on renovations, defects and pre-purchase risk assessments — translated out of jargon.

FAQ

Frequently Asked Questions

Why engage a peer reviewer if the original engineer is qualified?

Because even competent engineers make errors. Peer review is a system-level safeguard — it doesn't suggest the original engineer is incompetent, it acknowledges that complex design work benefits from a second independent pass. Most major engineering firms peer-review their own internal designs for this exact reason; smaller firms often don't have that internal capacity.

Do you also do the underlying design work?

Yes — across structural, facade, waterproofing, remedial and stormwater. But we'll never peer review work we've designed ourselves, and we won't be engaged to design after peer-reviewing another engineer's work on the same project. The independence is the value.

How much does a peer review cost?

Typically 10–25% of the original engineering fee, depending on scope. A structural peer review of a single-dwelling design might be $1,200–$2,000. A high-rise facade PS review might be $6k–$15k. We quote fixed-fee after reviewing the documentation scope.

Do you witness the test or just sign the report?

We attend. The witness is the value — anyone can sign a paper report after the fact. Our test reports are based on what our engineer saw on the day, including pre-test conditions, in-test observations and post-test inspection.

Can your reports be used in disputes or court?

Yes. Our peer review and test reports are written to evidentiary standards — referenced to specific Standards, supported by photographs and measurements, and prepared by engineers eligible to give expert evidence. We routinely produce reports that are later used in NCAT, AFCA and Supreme Court proceedings.

What's the difference between peer review and certification?

A certificate confirms compliance based on the certifier's own assessment. A peer review independently reviews someone else's certificate or design. Certification is a primary engineering act; peer review is a secondary verification. Many projects benefit from both.

Do you cover all of Australia?

Yes. We have offices in Sydney (Surry Hills), Melbourne (Cremorne) and the Gold Coast (Bundall), and regularly carry out peer review and witnessed testing across all states. Some specialist tests (e.g. AS 4284 water-penetration testing) require specific rigs; for those we work with accredited test labs and witness on-site.

What if our peer review identifies non-compliance?

We document the finding with the clause reference and the recommended action. The original designer then has the chance to respond — most non-conformances are resolved through clarification or a minor design amendment. Major non-conformances may require re-design, but identifying them at peer review stage is far cheaper than identifying them during construction or after handover.

Need an Independent Peer Review or Witnessed Test?

Tell us about the design or test you need reviewed and we'll come back with a fixed-fee scope — usually within 24 hours.

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