Which sustainability evidence do we need before materials arrive on site?
A product can meet the specification and still leave a gap in the project’s evidence. The team needs to establish two things: that the product is eligible for the intended claim, and that the eligible product is what the builder actually installed.
Direct answer
Set the evidence deadline before the decision becomes expensive or impractical to reverse. Check eligibility before committing to a product. Collect delivery, quantity and installation records as the work proceeds.
- Before order or fabrication: confirm the proposed product, the applicable requirement and the acceptable proof. Allow time to review the proof and resolve a mismatch before releasing the commitment.
- At delivery and installation: match the approved product to delivery records, quantities and installed locations. Where a chain-of-custody claim applies, retain the scheme-specific transaction evidence.
Before-order eligibility evidence is not the same as delivery or batch evidence. Do not wait for practical completion to chase declarations the as-built submission needs - but also do not invent a universal certificate list for every product.
Decision tool: gate-based evidence matrix
Use this as a starting template, not a universal certificate list. Each row needs a requirement reference, named evidence owner, reviewer, due date and decision. Set the due date by working backwards from fabrication or installation, allowing for review, supplier correction and re-review.
Evidence item (if the project requires it) | Latest safe gate | Owner → reviewer | Due date / record ID | Traceability chain | Common trap |
|---|---|---|---|---|---|
Product identity and certificate coverage | Before order or before fabrication | Procurement → sustainability / design | Approved product → certificate coverage → invoice → installed location | Coverage statement ignored; wrong thickness or coating | |
Volatile organic compounds (VOC) / formaldehyde - where specified | Before order / before site application or machining | Trade → finishes reviewer | Project limit + required test method → accepted product evidence → delivery record → installed location | “Equivalent” tin without matching certificate | |
Responsible Products / finishes pathway (where used) | Eligibility before order; actual cost evidence at invoicing | Trade + quantity surveyor → sustainability lead | Recognised initiative → accepted rating pathway → actual cost evidence | Cost evidence missing; retained items lack agreed valuation/photos | |
Timber chain of custody (where required) | Before order; confirm again at delivery | Carpentry / supply → reviewer | Scheme claim → chain-of-custody invoice → delivery docket → installation log | Mixed certified and uncertified packs | |
Recycled content / declared mix (concrete, steel - where claimed) | Before pour / before fabrication | Structural/civil trade → design | Approved mix or mill declaration → delivery docket → pour/install record | Silent batch-plant change | |
Construction and demolition waste reporting (where targeted) | Agree format before works; collect at each movement and report as specified | Waste contractor + trades → environmental management plan owner | Segregation method → facility destination → weighbridge / report | Unclear segregation duties and evidence ownership | |
Agency materials endorsement (where the project has control points) | Before buying past that control point | Builder → agency sustainability unit / project process | Endorsement reference on procurement record | Buying ahead of an endorsement gate |
An Environmental Product Declaration (EPD) is data for an assessment, not automatic proof that a product meets a carbon target. Check product coverage and the project method. EPD Australasia TC 01 permits stated average, representative or worst-case results for similar products; a product-family declaration is not automatically invalid.
For Green Star projects, use the registered tool, applicable submission guidelines and project rulings to define acceptable evidence. NATSPEC’s specification guide is a useful worksection and evidence prompt, but it expressly does not guarantee certification. A safety data sheet (SDS) does not automatically answer every emissions-testing requirement.
Which requirements apply to this project?
- NSW schools: confirm the applicable EFSG edition before extracting requirements. School Infrastructure ties editions to project timing and allows project-specific directions; the newest document is not automatically the contractual edition.
- Victorian schools: identify the project’s Building Quality Standards Handbook requirements and any additional certification commitment. The Department’s policy treats Green Star certification as an additional project-based initiative.
- For a hospital, request the approved sustainability plan, materials specification and procurement control points. Record who can release each point. A generic materials list cannot establish the requirements of the particular clinical project.
- Victorian public healthcare: VHBA’s published guidance includes sustainability control points. Confirm the applicable agency requirements and any project directions before programming an endorsement.
Failure mode (illustrative - not a real project)
Illustrative example: joinery is released for fabrication on the supplier’s promise of a formaldehyde certificate. The certificate later supplied covers a different board. The installed board might still comply, but the team has not established that it does. The options now require investigation, further acceptable evidence or replacement.
The avoidable error was treating “certificate requested” as “product verified”. Keep those as separate statuses. A pending certificate is a hold for the affected commitment, not evidence of failure or compliance.
Concrete next action
At the next procurement meeting, review packages due for release before the following meeting. For each open evidence item, record the blocker, responsible person, due date and affected order or activity. Close a row only when the reviewer records the accepted evidence reference and the person with release authority records the decision.
When the evidence relates to a proposed substitute, use the four-screen substitution check before releasing the affected package.
For carbon declarations, establish whether the EPDs can support the comparison before accepting the evidence as like for like.
Sources
- School Infrastructure NSW - EFSG home: edition applicability.
- NATSPEC - Specifying for Green Star Buildings using NATSPEC, v1.2, pp. 4 and 15–16: guidance status and materials evidence prompts.
- EPD Australasia - Technical Clarification TC 01: coverage of similar products.
- Victorian Department of Education - Sustainable and Climate Resilient Facilities policy.
- VHBA - Guidelines for sustainability in capital works: scope and control points.
- The evidence matrix and meeting procedure are Makao’s coordination recommendations. They do not replace project specifications or scheme acceptance rules.
- Confirm editions and project-specific requirements when applying this guide.
- Examples are hypothetical. No client project data or measured failure rates are claimed.
Questions or corrections: contact Makao.
