Fibre Reinforced Facade Encyclopedia: Design and detailing
A specifier is the person who selects a product and writes the clauses that put it into the contract documents, most often an architect, a facade consultant or an engineer, and on larger projects a dedicated specification writer working to their instructions. The role is not procurement and it is not design in the abstract. It is the point at which a design intention becomes a contractually enforceable description of a product, its performance, its evidence and its workmanship, and everything downstream on the facade follows from how well that is done.
A manufacturer’s brochure says a panel is fire safe. A specification says the panel achieves a Group 1 classification to AS 5637.1, tested by a named accredited laboratory, with the report to be provided. Only one of those survives an audit.
At a glance
| Property | Typical value | Note |
|---|---|---|
| Who | Architect, facade consultant, engineer, specification writer | Varies with project size and procurement model |
| Primary output | The project specification and its performance clauses | Plus schedules and input to drawings |
| Australian frameworks | NATSPEC; Masterspec in New Zealand, NBS in the UK | Maintained master specification systems |
| Specification types | Prescriptive, performance or proprietary | Most facade sections mix all three |
| Evidence required | Test reports, certificates, EPD, warranties | Named standard and named testing body, always |
| Key decision point | Concept to design development | Substitution after tender is where compliance is lost |
| Fire pathway decision | Deemed-to-satisfy or performance solution | Determines the evidence the product must carry |
| Lead time needed | Weeks for samples, longer for testing | Late specification compresses it |
| Liability exposure | Professional, for the adequacy of the documentation | Which is why unattributed claims are unusable |
What the role involves
Specifying a facade product is a sequence of decisions, each narrowing the field. The specifier establishes what the wall has to do: the loads it carries, the fire pathway it takes, the weathertightness and air tightness required, the design life, the acoustic and thermal requirements, and the appearance the project is committed to. They then select a material family capable of meeting all of it simultaneously, which is usually the hardest step because the constraints compete. They document the selection so it can be tendered, built and verified, and they review what is submitted against what was specified, which is where most of the value of the role is realised.
Three failure modes recur. Specifying by product name alone produces a document that cannot be enforced when an equivalent is offered, because nothing was written down about what made the named product acceptable. Specifying by performance alone, in terms so general that almost anything can be argued to comply, produces the same result from the opposite direction. And accepting substitutions after tender without re-checking the evidence is how a compliant design becomes a non-compliant building.
What a specifier needs from a manufacturer
- Test reports in full, naming the standard, the tested product, the thickness and construction tested, the date and the testing body, not a summary
- The classification that follows from those reports, stated precisely, with the report reference
- Declared physical properties with the test method beside each: weight per square metre, flexural and tensile strength, elastic modulus, thermal conductivity, thermal expansion, moisture movement and aged design values
- Fixing and connection data: permitted anchor types, capacities, edge distances, adjustment ranges and the bracket to panel connection
- Standard details showing the panel, cavity, substructure, flashing and barrier together rather than the panel alone
- Tolerances, panel size limits and the transport and crane constraints that set them
- A draft specification section in the project’s framework, which the specifier can edit rather than transcribe
- Environmental product declaration with its programme operator and scope
- Warranty terms, including what the owner must do to keep them valid
- Maintenance requirements: cleaning method, permitted pressures and chemistries, and consumable service lives
How to give it to them
Format matters almost as much as content, because a specifier works against a programme and will use what is easiest to verify. Provide a single technical document per system rather than scattered data sheets, with test evidence appended in full and a contents page that lets a reviewer find the AS 1530.1 report without reading the brochure. Provide the specification section as editable text in the framework the project uses, with evidence clauses already written, and details as drawing files that can be dropped into a detail sheet and adapted.
Be explicit about what the product does not do. A specifier who discovers a limitation late loses time and trust; one told at the outset that a finish cannot be achieved below a certain panel thickness, or that a fire pathway requires a particular build-up, can design around it. Fibre reinforced polymer is the clearest example: it is a polymer composite and it is not non-combustible, and its compliance pathway is reaction to fire and full-scale testing rather than non-combustibility.
Writing an enforceable clause
A facade specification section that works tends to contain the same components: the performance required, in measurable terms with the standard named; the evidence to be provided and when, usually before fabrication; the product or range of acceptable products; workmanship and installation requirements including hold points; samples, control samples and mock-up requirements; tolerances of the product and of the installed work; the submissions required; the warranty; and the handover documentation.
Two clauses are worth writing carefully every time. The substitution clause should require any alternative to be supported by the same evidence, against the same standards, from an accredited testing body, and require re-approval of any assembly whose compliance rests on a tested system. The evidence clause should require reports rather than summaries, and require them before fabrication, because evidence produced at handover cannot change anything.
Standards and references
- NATSPEC National Building Specification, and the NATSPEC TECHnotes on product specification and substitution
- NCC 2022 Volume One, external wall provisions, Specification 7 and the evidence of suitability provisions (check the edition adopted in your jurisdiction)
- AS 1530.1, AS 1530.3, AS 5637.1 and AS 5113, as the standards a facade fire claim must name
- AS/NZS 1170.2 and AS 1170.0 for the structural actions the specification must state
- AS/NZS 4284 Testing of building facades, where project or system testing is required
- EN 15804 and ISO 14025 for environmental product declarations, and ISO 15686 for service life planning
- Masterspec in New Zealand and NBS in the United Kingdom, as the equivalent master specification frameworks
Related terms
Questions specifiers ask
Who is the specifier on a project?
Usually the architect, the facade consultant or an engineer, and on larger projects a dedicated specification writer working to their instructions. The role is to turn a design intention into contractually enforceable clauses describing the product, its performance, the evidence it must carry and the workmanship required.
What does a specifier need from a manufacturer?
Full test reports naming the standard, the tested product and the testing body; precise classifications with report references; declared properties with the test method beside each; fixing and connection data; details in a usable drawing format; tolerances and size limits; editable specification text; and warranty and maintenance information.
Why is a fire claim without a testing body unusable?
Because it cannot be verified and will not survive scrutiny. A usable statement names the standard and the laboratory, for example Not Deemed Combustible under AS/NZS 1530.1 tested by Ignis Labs, or an AS 5637 Group 1 classification from AWTA Product Testing. A claim that a product is fire safe means nothing in a specification.
When should a manufacturer engage a specifier?
Between concept and design development, while the panel grid, joint strategy, fire pathway and substructure are still open. By tender the decisions are documented and the only remaining question is substitution, which is the point at which compliance is most often lost.
Writing a facade section and need the evidence to write against? We provide full test reports, editable specification text and details in drawing format. Browse the technical library
Reviewed by Richard Halvorsen, General Manager, ShapeShift Technologies. Last updated September 2026.