Can you provide an obligation-free quotation before starting?

Yes. We offer an obligation-free quotation for your building dispute or Expert Witness Report. This helps you understand the likely scope, timeline, and costs involved before proceeding.

What is the minimum cost of a small claim?

For a small claim involving one hour of site investigation, one Expert Witness Report, and one Scott Schedule, the minimum cost is approximately $2,750.00 (inclusive of GST).

What is the typical price range for an Expert Witness Report?

Most Expert Witness Reports fall within the $5,000–$15,000 range, depending on the scale and complexity of the matter. For larger claims, such as multi-unit or strata complex disputes, total reporting costs can exceed $600,000 in major cases worth $10 million or more.

How long does it take to receive the report?

On most occasions, an Expert Witness Report takes around 2–4 weeks from the date of the site investigation to prepare and submit. Complex matters may take several months to compile sufficient supporting evidence.

When are site investigations conducted?

All site investigations are generally carried out between 7:00am and 9:00am on weekdays, unless prior arrangements have been made.

Do you require payment upfront?

Yes. It is company policy that all payments are made prior to both the Site Investigation and the commencement of the Expert Witness Report. This ensures the independence and objectivity of our opinions.

Where do you provide Expert Witness services?

We service all of New South Wales, including Sydney, regional cities, and country towns, including the Central Coast, Hunter Valley, Mid North Coast, New England, Northern Rivers, Central West, South Coast, and Riverina/Murray regions, as well as Broken Hill and other remote locations.

Why choose Awesim Pty Ltd for your Expert Witness Report?

With more than 35 years in the building and construction industry and the business established in 1996, Awesim brings extensive experience and credibility. Director Glen Sim is a qualified builder and accredited consultant with a trade background in Carpentry/Joinery and a Diploma in Construction Management. Awesim is fully insured with Professional Indemnity cover and recognised by NCAT and the courts for compliance with the Expert Witness Code of Conduct.

What is a Scott Schedule and why is it needed?

A Scott Schedule is a structured report outlining the specific issues in dispute — for example, defects, costs of rectification, or variations. It's often required by NCAT or the Court to help clearly compare both parties' expert opinions side by side.

What is included in the Bundle of Documents?

The Bundle of Documents is the complete evidence pack submitted to NCAT or the Court. It includes the Expert Witness Report and Scott Schedule, Building Contract and Plans, Affidavit and Statement of Claim, Chronology of Events, and supporting evidence and correspondence, tabulated, paginated, indexed, and provided in triplicate.

What qualifications do your Expert Witnesses hold?

Our Expert Witnesses come from trade and management backgrounds in the Building & Construction industry. Director Glen Sim is a qualified Carpenter/Joiner with a Diploma in Construction Management, a NSW Builder's Licence, and accreditation as a Building Consultant.

Are your Expert Witness Reports accepted by NCAT and the Courts?

Yes. All of our Expert Witness Reports strictly adhere to the Code of Conduct for Expert Witnesses and are fully recognised by NCAT and the NSW Court system.

Can you assist with both residential and commercial building disputes?

Yes. We handle both residential and commercial building disputes across New South Wales, tailoring the report to suit the nature and scale of the claim.

Do you work for both homeowners and builders?

Yes. We remain fully independent and are engaged by both homeowners and builders, as well as legal representatives or insurers. Our findings are impartial and evidence-based.

What happens after the Expert Witness Report is completed?

After your report is submitted, we can assist in conferencing with the opposing expert (Expert Conclave), attending Court or NCAT hearings, providing clarifications or supplementary reports, and preparing your Bundle of Documents for submission.

Do you charge for travel outside Sydney?

Yes, travel expenses may apply for site inspections outside Sydney or the metropolitan area. We always provide an upfront estimate of any travel-related costs in your quotation.

What type of evidence do you need before starting a report?

Typically, we'll ask for copies of your building contract, plans, correspondence, defect lists, and any photographic or inspection evidence you already have.

Can I use your report for insurance or warranty claims?

Yes. Many clients use our Expert Witness Reports for Home Building Compensation Fund (HBCF) claims, insurance disputes, or warranty issues. Our reports are designed to be compliant and admissible for these types of proceedings.

How do I get started with booking a Site Investigation?

You can contact us via phone, email, or the online form for an obligation-free quote. Once you accept the quote and payment is confirmed, we'll schedule a site investigation, typically between 7:00am and 7:00pm on weekdays.

Who is Awesim and how long have you been operating?

Awesim Pty Ltd is a privately owned Australian building consultancy, established in 1996. It was founded by Glen Sim, who brings over 35 years of experience across the building and construction industries and more than 15 years providing litigation support to homeowners, builders, and lawyers.

We provide independent building consultancy and litigation support, specialising in expert witness reports and Scott Schedules for building disputes before NCAT and the NSW courts.

What kinds of building matters do you specialise in?

We focus on building disputes and defects, including waterproofing failures, structural defects, incomplete and defective building works, and construction litigation, covering expert witness reports, Scott Schedules, and quantum meruit assessments.

What areas do you cover?

We provide services throughout New South Wales, including regional and remote locations. Our offices are located in Sydney CBD, Tamworth and Tweed Heads, and we travel across New South Wales for inspections and investigations.

Who do you work with?

We assist homeowners, solicitors and legal representatives, builders and contractors, developers, property owners, owners corporations, and parties involved in insurance-related building matters.

What services do you offer?

Our services include expert witness reports, Scott Schedules, and quantum meruit reports for litigation support, alongside client-side project management, contracts administration, and construction scheduling.

Why should I choose Awesim over another building consultant?

We provide independent, objective reporting backed by more than 35 years of practical building and construction experience, coupled with over 15 years of litigation support. Our reports are tribunal-ready, supported by detailed photographic and compliance evidence, and grounded in strong knowledge of the National Construction Code and Australian Standards.

What building problems can you help me with?

We help with building defects, disputes over incomplete or defective work, waterproofing and structural issues, and disagreements that require independent expert evidence to resolve — particularly matters heading to or already before NCAT.

What outcome can I expect from working with you?

You can expect a clear understanding of your position, reliable independent expert evidence prepared for NCAT or court, and professional support aimed at resolving your dispute and protecting your interests.

How much does an Expert Witness Report cost for an NCAT building dispute in NSW?

An NCAT Expert Witness Report in NSW typically costs between $5,000 and $15,000, with a small single-issue claim starting at a minimum of about $2,750 incl. GST. Awesim publishes fixed, itemised rates: site investigation is $1,100 for the first hour then $550/hour, Expert Witness reporting is $1,100 per issue, and a Scott Schedule is $550 per issue. Conclave or NCAT/court hearing attendance is $3,850 per day. Large strata or multi-unit matters can exceed $600,000 on claims worth $10 million or more. All rates include GST and are confirmed in an obligation-free written quote before any work begins. Reports are usually delivered within 2–4 weeks of the site inspection.

Do I need an Expert Witness Report for NCAT, or is a building inspection enough?

If your building dispute is going to NCAT or court, you need a formal Expert Witness Report — a standard pre-purchase building inspection is not accepted by the Tribunal. An Expert Witness Report is prepared under the Expert Witness Code of Conduct, assesses each defect against the National Construction Code, Australian Standards and the Home Building Act, and states cause, responsibility, rectification method and cost for every issue. Awesim prepares these reports, with an accompanying Scott Schedule where multiple defects are involved, for homeowners, builders and solicitors across NSW.

How much does a forensic waterproofing investigation cost for an NCAT dispute in NSW?

A forensic waterproofing investigation is priced the same way as Awesim's other expert witness work: site investigation is $1,100 for the first hour and $550 per hour thereafter, with additional reporting cost thereafter. Waterproofing matters often involve more diagnostic time, using thermal imaging, moisture meters, dye testing and level checks for falls. Glen Sim holds a Master Builders Association qualification in Waterproofing Compliance & Inspection, assessing each defect against AS 3740 or AS 4654.2 depending on the work. All rates are GST-inclusive and confirmed in an upfront written quote.

My bathroom or balcony is leaking — how do I know if it's actually a waterproofing defect?

Not every leak is caused by a failed membrane. A wet skirting board, water-stained ceiling or damp wall can also be caused by a leaking pipe, blocked drainage, rising damp, poor external ground levels or water tracking from an unrelated part of the building — a forensic investigation is needed to tell the difference before any claim is made. Awesim uses thermal imaging cameras, pin and pinless moisture meters, digital levels and controlled dye testing to trace the actual water pathway rather than assuming the nearest visible symptom is the cause.

Blog

Shower Leaking Through the Floor: Structural Risks, Evidence Requirements, and Your Legal Options in NSW

August 10, 2026By Awesim

What Is Actually Happening When a Shower Leaks Through the Floor
Structural Risks You Should Not Ignore
Is This a Building Defect Under NSW Law?
The Evidence Problem: Why a Plumber's Report Is Not Enough
What NCAT Requires From You
Your Legal Options in NSW
Getting the Right Expert Involved Early
FAQs

A shower leaking through the floor needs prompt investigation. Stop using the affected shower where possible, photograph the damage and arrange an inspection to identify the source. This guide explains the evidence to preserve, the potential damage and the issues to assess before pursuing a NSW building defect claim.

What Is Actually Happening When a Shower Leaks Through the Floor

Water escaping beneath a shower may come from the waterproofing system, drainage connections or leaking plumbing. An inspection should distinguish these possible sources before repairs are specified. Moisture readings, plumbing tests and, where necessary and authorised, opening selected areas can help establish the cause.

The most common causes include:

Membrane not applied to the correct height on walls — the membrane must extend a minimum distance up the wall at the floor junction
Inadequate or missing membrane at the drain collar, one of the most failure-prone junctions in any shower
Membrane applied too thinly, particularly at corners and penetrations
Membrane not allowed to cure before tiling, causing poor adhesion to the substrate
Movement cracks in the substrate that the membrane was not designed or applied to accommodate

In practice, many waterproofing failures in NSW residential construction come down to non-compliant installation rather than product failure. The membrane was there — it just wasn't installed to the standard required under the National Construction Code and AS 3740, the Australian Standard for waterproofing of domestic wet areas.

Structural Risks You Should Not Ignore

The longer a shower leak goes undetected or unrepaired, the more damage accumulates. Depending on your floor construction, the consequences range from cosmetic to structural.

Timber Subfloor Construction

Older homes and many contemporary builds use timber floor joists. Sustained moisture causes timber to swell, delaminate, and eventually rot. Rotted joists lose load-bearing capacity, and in severe cases a shower floor can become structurally unsafe. You may also see secondary damage in adjacent rooms where water has tracked along joists before appearing as a stain on a ceiling below.

Concrete Slab Construction

Concrete looks more resilient, but water penetrating a slab can corrode the steel reinforcement inside it. Corroding steel expands, which causes the concrete to crack and spall over time. It's a slow process, but expensive to remediate and capable of affecting the structural rating of the slab.

Mould and Air Quality

Waterlogged substrates are ideal environments for mould. Mould hidden beneath tiles or inside wall cavities is a health risk and notoriously difficult to remediate without removing the affected materials entirely. In NSW, mould resulting from a building defect is a legitimate component of a defect claim.

Is This a Building Defect Under NSW Law?

In most cases, yes. Under the Home Building Act 1989 (NSW), residential building work must be carried out with due care and skill, in accordance with the plans and specifications, and in compliance with all applicable laws and requirements. Waterproofing is a statutory warranty item, meaning the builder is liable for defects for a defined period.

Section 18E of the Home Building Act 1989 provides a six-year warranty period for major defects. Waterproofing is a major element, but a waterproofing failure is not automatically a major defect. The statutory test also considers the cause and actual or likely consequences, including inability to use the building or part of it for its intended purpose, destruction or threatened collapse. Obtain advice about classification and the time limit that applies.

For non-major defects, the period is two years. If you're unsure which category applies to your situation, that's exactly the kind of question a building consultant can help you answer before you file anything.

The Evidence Problem: Why a Plumber’s Report Is Not Enough

A plumber’s findings can be valuable evidence, particularly when testing pipework and drainage. A building consultant can address the wider construction issues, while an engineer may be needed for structural concerns. Choose expertise that matches the questions in dispute.

What you need is an independent forensic assessment that:

Identifies the specific waterproofing failure mode
Establishes which element of the installation was non-compliant and with what standard
Documents the consequential damage caused by that failure
Quantifies the cost of rectification to a proper standard

A Forensic Waterproofing Inspection is a specialist on-site investigation designed to produce exactly this kind of evidence-grade report. It goes beyond visual observation — the inspector examines the membrane system, the drain collar, the substrate condition, the tiling methodology, and the extent of water ingress, with findings documented in a format suitable for formal proceedings.

This distinction matters enormously if your dispute ends up at NCAT or in court. A report that doesn't meet evidentiary standards won't carry weight, regardless of how accurate its conclusions are.

What NCAT Requires From You

The NSW Civil and Administrative Tribunal handles most residential building disputes in NSW. If your shower leak dispute involves a licensed builder and falls within the monetary jurisdiction, NCAT is likely where your matter will be heard.

NCAT will typically require you to produce:

Evidence of the defect — photographs, inspection reports
An independent expert report prepared by a suitably qualified person
A Scott Schedule itemising each defect, the applicable standard breached, the builder's position, and the cost of rectification

For NCAT matters, check Procedural Direction 3 and its Experts’ Code of Conduct, together with the orders in your case. NSW court proceedings may require compliance with UCPR Schedule 7. The report must address the requirements of the forum in which it will be used.

The Scott Schedule is the document that structures the dispute. Each defect gets its own row, with your position, the builder's position, and the cost attributed to each item set out side by side. Tribunals and courts use Scott Schedules to manage complex multi-defect disputes efficiently. If you've never seen one, Awesim has a Scott Schedule template and plain-English guidance available on their site.

Your Legal Options in NSW

Depending on the value of your claim and the nature of the dispute, several pathways are available.

Negotiation and Demand Letter

Before filing anything, a formal letter of demand supported by a forensic inspection report often prompts a response from the builder or their insurer. It's the least expensive path and worth attempting first.

NCAT Building and Construction Division

For most residential building defect disputes in NSW, NCAT is the appropriate forum. It's designed to be accessible to homeowners without legal representation, though many engage a solicitor for more complex matters. The monetary jurisdiction covers claims up to $500,000 for general building work.

NSW District Court or Supreme Court

Larger claims or disputes involving more complex legal issues may proceed in the District Court or Supreme Court. Expert Witness Reports prepared to UCPR Schedule 7 standards are equally applicable at these levels.

Home Building Compensation Fund

HBCF cover depends on the policy and a qualifying trigger, such as the builder’s death, disappearance or insolvency, or licence suspension for failure to comply with a court or NCAT money order in your favour. A licence suspension or cancellation alone is not enough. Check SIRA’s claim guidance, policy conditions and notification deadlines.

Getting the Right Expert Involved Early

The most common mistake homeowners make in shower leak disputes is waiting too long to engage an independent building consultant. By the time a solicitor advises them to get an expert report, they've already made statements, attempted repairs, or allowed the builder access without documentation — all of which can complicate the evidentiary picture.

Engaging a consultant early means the damage is documented in its original state, the cause is identified before remediation obscures it, and you understand the strength of your position before committing to a particular legal pathway.

Awesim Building Consultants prepares independent inspection reports, expert witness reports and Scott Schedules for NSW building disputes. Glen Sim brings over 35 years of construction experience and more than 15 years of litigation support experience. Our Sydney and Tamworth offices support inspections across NSW. See the documents to provide when briefing an expert.

FAQs

Q: Is a shower leaking through the floor automatically a major defect?
A: No. Waterproofing is a major element, but the defect must satisfy the full test in section 18E. Document the failure and its consequences. A building consultant can provide technical evidence; obtain legal advice about classification and deadlines.

Q: Can I repair the shower before getting an expert report?
A: Repairing the shower before an inspection is documented can significantly weaken your claim. Once the tiles are removed and the membrane replaced, the original failure mode may be impossible to assess. If the leak is causing urgent structural damage, document everything thoroughly with photographs and video before any work begins, and engage an independent consultant as soon as possible.

Q: What is a Forensic Waterproofing Inspection and how is it different from a standard building inspection?
A: A standard building inspection is a visual assessment of accessible areas. A Forensic Waterproofing Inspection is a specialist investigation focused specifically on identifying the cause and extent of a waterproofing failure. It produces an evidence-grade report suitable for use in NCAT or court proceedings — not just a general condition report.

Q: What does a Scott Schedule look like for a shower leak dispute?
A: A Scott Schedule for a shower leak typically lists each defect as a separate item — for example, membrane failure at the drain collar, inadequate membrane height at the wall junction, and consequential damage to the subfloor. For each item, it records your description of the defect, the standard breached, the builder's response, and the cost of rectification. Awesim publishes a Scott Schedule template you can use as a reference.

Q: How much does an Expert Witness Report cost for a shower leak matter?
A: The market range for expert witness reports runs from $2,000 to $10,000 AUD, with approximately $4,500 being typical. The actual cost depends on the complexity of the matter, the number of defects, and whether an on-site inspection is required. Awesim offers a free initial consultation to discuss your situation before any fee is agreed.

Q: Can I use the same report in NCAT and a court?
A: The report must meet the requirements and orders of the receiving forum. Existing inspection evidence may remain useful, but the expert may need to update the report, provide further reasoning or acknowledge the applicable code.

Q: What if my builder is no longer operating?
A: Check whether HBCF cover exists and a qualifying trigger has occurred. Business closure alone does not establish eligibility. Notify the insurer promptly and obtain advice about the evidence and time limits.

A shower leaking through the floor often has a clear legal remedy in NSW. How that claim plays out will depend heavily on the quality of the evidence you produce and how early you engage independent expertise. Getting a forensic inspection done before repairs — and before making formal statements to your builder — is the single most important step you can take.

Awesim

Glen Sim is a highly experienced Building Consultant, Licensed Builder, Construction Consultant, and Expert Witness with more than 35 years of practical experience within the Australian building and construction industry. As the Founder and Director of Awesim Building Consultants, Glen has established a strong reputation throughout Sydney and regional New South Wales for providing independent, evidence-based building consultancy services and expert reporting for complex building and construction disputes.Beginning his career as an apprentice carpenter with TAFE NSW in 1990, Glen completed his apprenticeship in 1993 before progressing into senior construction and management roles across residential, commercial, and remedial building sectors. His extensive industry background provides him with genuine hands-on construction knowledge — something that distinguishes him from many consultants who have limited site-based experience.Glen became a Licensed Builder in Victoria in 2004 before returning to New South Wales in 2011, where he continues to operate under NSW Builder Licence No. 232673C. Over the course of his career, he has worked across all stages of the construction process, including carpentry, supervision, project management, contract administration, construction scheduling, defect rectification, quality control, and dispute resolution.Today, Glen is widely recognised for his expertise in:Expert Witness Reports Scott Schedules NCAT Building Disputes Construction Defect Investigations Building Defect Reports Quantum Meruit Assessments Construction Programming & Delay Analysis Client-Side Project Management Contract & Scope of Works AssessmentsGlen regularly assists homeowners, builders, developers, solicitors, strata managers, insurers, and commercial clients by providing technically detailed and independent reporting for litigation and dispute resolution matters. His reports are prepared with a strong understanding of the requirements of the NSW Civil and Administrative Tribunal (NCAT), court procedures, the Expert Witness Code of Conduct, the National Construction Code (NCC), Australian Standards, and accepted building industry practices. Over 15+ years experience providing litigation support with expert witness reports and Scott schedules. What clients value most about Glen is his practical approach, integrity, attention to detail, and ability to clearly explain complex construction issues in a manner that is easy to understand. His combination of trade-based experience, construction management knowledge, and investigative expertise allows him to identify issues that are often overlooked by less experienced consultants.Over the years, Glen has developed a reputation for producing thorough, methodical, and evidence-supported reports that clients and legal representatives can rely upon during negotiations, mediations, tribunal proceedings, and litigation matters. His commitment to accuracy, professionalism, and impartiality has made Awesim Building Consultants a trusted name in the building consultancy industry across NSW.Glen is also known for his strong commitment to client service, ensuring every matter is approached with professionalism, transparency, and genuine care for achieving practical outcomes. His experience across both metropolitan Sydney and regional New South Wales provides him with a broad understanding of differing construction methods, site conditions, workmanship standards, and project delivery challenges throughout the state.Outside of the construction industry, Glen values family life and regional Australia. He has been happily married to internationally recognised author Audra Starkey since March 2025. Together, they share a passion for supporting rural communities and building trusted professional relationships grounded in honesty and respect.With more than three decades of industry experience, Glen Sim continues to provide trusted building consultancy and expert witness services backed by real construction knowledge, independent assessment, and a commitment to helping clients navigate complex building matters with confidence.

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