A useful waterproofing file is a chain of names, numbers and dated records. It should tell you who contracted for the work, which licence class covered it, who signed any project-specific completion record, and which document your building certifier expected to receive. A document called a certificate is not self-proving. Its issuer and purpose still have to be identifiable.
That file also has to match the code edition in force for the project. Australia did not have one national edition answer when this page was checked on 24 August 2026. Use the jurisdiction and approval date, then confirm them against our NCC edition guide before treating any clause number as relevant.
Start with a dated licence-register record
Before accepting a quote, search the regulator’s public register by the contractor’s exact legal name or licence number. Save the result as a PDF or screenshot with the search date visible. The useful fields are the licensee name, licence number, status, class or scope, conditions, and history. A business name on a vehicle is not a substitute for those fields.
In Queensland, the QBCC says its licensee register provides a complete licence history and is more detailed than its local-contractor search. Its homeowner guidance also says to ask to see the contractor’s physical or digital licence before signing or paying. Keep the register result even if you saw the card, because it records what you checked and when.
The Tilekind FAQ points to national reference material, but it cannot identify the person engaged on your project. The project file needs the regulator’s own record for that person or entity.
Put the same identity in the written agreement
The quote and contract should use the legal name shown in the register, not only a trading name, and should carry the corresponding contractor licence number where the jurisdiction requires it. The work description should identify the project address and the wet-area work being contracted, while leaving technical adequacy and compliance judgments to the responsible certifier or inspector.
For Queensland work valued above $3,300, QBCC’s contracts and agreement types page says a Level 1 contract must include the contracting parties and the building contractor’s name and licence number as they appear on the licence. Below that figure, QBCC still recommends a record or agreement. Those are Queensland statements, not national thresholds. Check current rules.
If the quote, contract and register show different names or numbers, stop at the paperwork question. Ask which legal person is contracting, which licence covers the stated scope, and which entity will issue the invoice. Do not repair the mismatch by assuming related names belong to the same licence.
Do not merge the company and the individual
A company contractor licence and an individual supervisor or worker record answer different questions. Your contract may be with a licensed company while a named individual holds the technical class or supervisory role. If a project form is signed by an individual, keep that person’s name, licence number, licence class and stated role alongside the company’s contract record.
This is why one number copied onto every page can be misleading. Record the company number against the party taking the contract. Record the individual number against the person who signs or certifies a project-specific document. If the register does not show the class that the document claims, take the question to the regulator or building certifier rather than treating a job title as evidence.
A licence card is evidence of a licence at a point in time. It is not an inspection report, a warranty, an invoice or proof that a particular room complies. Keep those document types separate.
Ask the certifier which completion record is required
There is no safe Australia-wide instruction to “get a waterproofing certificate” and assume the same form applies everywhere. Before work is documented as complete, ask the appointed building certifier, surveyor or council which project-specific certificate, aspect form, statement or inspection record is required for the approval pathway in that jurisdiction. Ask for the exact form name and the person authorised to sign it.
When that record is issued, check its paperwork fields: project address, approval or permit reference, the aspect or scope being certified, issuer’s legal name, individual licence number, licence class, signature and date. If the certifier says no such form is required for that project, keep the certifier’s dated written answer instead of substituting a generic private certificate.
A private warranty document can sit beside the required completion record, but it does not replace it. The same is true of a page headed “compliance certificate” when its statutory source, issuer authority or project reference is unclear.
Keep the invoice, receipt and warranty as a matched set
The final invoice should identify the same contracting party and licence number as the agreement, describe the project at the same address, and carry an issue date. Keep payment receipts with it. This creates a clean link between the party you checked, the party you contracted and the party that was paid, without asking a later reader to reconstruct that chain from bank descriptions.
Ask for any written workmanship or product-system warranty offered for the project. Record the issuer, start date, duration, exclusions, claim contact and the document or invoice it relies on. A warranty is a promise on stated terms; it is not a regulator’s licence check and does not establish NCC or Australian Standard compliance. Keep full terms, not a summary.
If a different company issues the warranty, preserve that difference. Do not change the name in your file to make the pages look consistent. The inconsistency is the question to resolve in writing.
NCC 2025 F2D2 is a reference, not a certificate
On the ABCB’s current NCC 2025 Volume One page, clause F2D2 is titled “Wet area construction”. For Class 2 and 3 buildings and Class 4 parts, paragraph F2D2(1)(b) says, word for word, “comply with AS 3740.” F2D2(2) addresses listed spaces in Class 5 to 9 buildings. The clause does not provide a homeowner certificate template.
This reference is only for a project to which NCC 2025 applies. On 24 August 2026, Queensland and New South Wales had 1 May 2027 commencement dates, Tasmania’s regulator said NCC 2022 again applied from 5 June 2026, and other jurisdictions had their own positions or transitions. The dated details and official links sit in the edition guide.
Do not ask a waterproofer to settle which code edition legally governs an approval. Ask the certifier to identify the edition in writing, then store that answer with the licence, contract and completion records.
AS 3740:2021 gets only four identifiers here
The Standards Australia Store record checked on 24 August 2026 identifies AS 3740:2021, gives its title as “Waterproofing of domestic wet areas”, and currently marks its public status as Current. This article uses only the designation, title, year and status. The standard’s paid text is not reproduced or paraphrased.
A line on a certificate that merely says “AS 3740” is therefore not the whole paper trail. Ask which edition is being identified, who is making the statement, what project document carries it, and what licence number belongs to that issuer. Whether the work satisfies the standard remains a matter for the appropriately qualified practitioner and the responsible certifier or inspector.
For the same reason, the FAQ reference links are reading pointers, not project evidence. Save the project’s own signed records.
Queensland and NSW show why class names need checking
QBCC publishes separate official licence-class pages for Waterproofing and Wall and floor tiling. That confirms two class records exist. It does not prove that every project needs two different people: the tiling page itself includes applying waterproofing for wall and floor tiling. Check the actual scope shown for the licensee.
New South Wales also publishes separate pages for waterproofing work and wall and floor tiling work, while its tiling category includes waterproofing wet areas to prepare them for tiling. Again, separate categories do not create a two-person rule.
In the same 24 August check, equivalent paired regulator pages were not established for Victoria, South Australia, Western Australia, Tasmania, the ACT or the Northern Territory. That is an unresolved finding, not proof that licences are unnecessary. Use the local regulator’s register and current scope definitions; do not copy the Queensland or NSW structure across a border.
The documents to keep in one project file
- A dated regulator-register result for the contracting person or company, showing status, licence number, class, scope and conditions.
- The written quote and signed contract or agreement, with the same legal name, project address, work description and contractor licence number.
- A separate register record for any individual whose licence number appears on a completion record, with their class and role preserved.
- The certifier’s written instruction naming the exact completion certificate, form, statement or inspection record required for the project.
- The completed project record, with address, approval reference, stated aspect, issuer, licence number, class, signature and date.
- The final invoice, payment receipts and any written warranty, each kept under the legal name of its actual issuer.
- The certifier’s written identification of the NCC edition used for the approval, plus the dated standard designation cited in the project record.
Tile choice belongs in a different file. If you are comparing surface appearance while the documentation questions are being resolved, keep that commercial shortlist separate; the matt finish collection does not make a wet-area suitability or compliance claim for any product.
The tiler side of the same handover is covered separately, in AS 3958 is not law.
Sources, date and limits of this page
Checked 24 August 2026 against the ABCB’s NCC 2025 Volume One F2 page, the Standards Australia Store record for AS 3740:2021, the QBCC licence-class, register and contract guidance pages, the two NSW Government trade-category pages, and public regulator surfaces for the remaining jurisdictions. Where the bounded check did not establish an equivalent class split, this page says so.
This page is a document-retention guide. It does not say how waterproofing should be designed, installed, tested, inspected or accepted; it does not decide which code edition governs a project; and it does not certify work, a person or a product. Those judgments stay with the regulator, the appointed building certifier or surveyor, and appropriately licensed practitioners.
The National Construction Code 2025 was provided by the Australian Building Codes Board under the CC BY 4.0 licence.
Next step — confirm the edition and commencement position for your jurisdiction in Which edition of the NCC applies in your state?, then ask the certifier to put the project-specific answer in writing. Save that reply with the project file.
Where this guide sits: Where to start sets out the order the guides follow.