Quick Answer
When a supplier provides a sandwich panel fire document, first confirm which type of fire performance the project requires. Reaction to fire, fire resistance and external fire exposure to roofs evaluate different things. Then check the document type, the product identity, the evaluated scope and the actual installation configuration. A single fire class or report number does not, by itself, confirm that the proposed construction is suitable for the project. The buyer should match the document to the quoted product, the intended application and the project’s stated performance requirement.
Reaction to Fire vs Fire Resistance
Fire performance documents for sandwich panels address different assessment types. They are not interchangeable, and a result from one type does not establish performance in another.
| Assessment | What it evaluates | What the buyer must verify |
|---|---|---|
| Reaction to fire | The contribution of a product to fire development under specified test conditions. Under BS EN 13501-1, products are classified into Euroclasses (A1, A2, B, C, D, E, F) with additional smoke and droplet classifications where applicable. | The product identity, the stated class, the classification standard and edition, the referenced test evidence, and whether the classification applies to the core material, the finished panel, or a specified end-use configuration. |
| Fire resistance | The performance of a specified building element or assembly against relevant fire-resistance criteria, such as integrity (E), insulation (I) and, where applicable, load-bearing capacity (R), under stated conditions. BS EN 13501-2 provides the corresponding classification framework. | The classified building element or assembly, its tested or assessed construction, and the documented field of application. Confirm relevant joints, supports, fixings and orientation; a core classification alone is not an assembly fire-resistance result. |
| External fire exposure to roofs | A roof system’s behaviour under specified external-fire exposure methods. BS EN 13501-5 includes method-specific classifications such as B_ROOF(t1); the test-method suffix matters. | The roof construction and applicable test method, including any stated substrate, mounting or detailing conditions. Do not treat an external-roof result as a reaction-to-fire or fire-resistance classification. |
The three parts of BS EN 13501 answer different questions. An external roof-fire classification, a reaction-to-fire result and an EI/REI fire-resistance classification are not interchangeable. A project may require more than one type of evidence. The required classification system and its edition should come from the project specification, not from an assumed cross-standard conversion.
Reaction-to-fire results can also depend on the tested end-use configuration. The same product may be assessed differently with other mounting methods, substrates, fixings or orientations. The UK government’s fire-safety FAQ highlights why the stated field of application matters when comparing a report with the intended use.
What Does the Fire Document Actually Cover?
Test Report, Classification Report and Certification Record
Suppliers may submit different types of fire documents. They serve different purposes and do not automatically replace one another.
Test report — records the test specimen, method, conditions and results. It may be part of the evidence used for classification. Do not assume an individual test result provides a separate classification unless the documentation expressly identifies the relevant classification and its scope.
Classification report — states a classification derived under the applicable rules and identifies the evaluated element or construction. Review its direct field of application and any properly supported extended application or referenced assessment. These define which variations, if any, are covered; they do not establish unlimited product interchangeability.
Certification or listing record — identifies a product or system under a particular scheme, with its specified conditions. For example, UL Product iQ supports searches by model, file, certification category or fire-resistance design number, as applicable. For UL fire-resistance-rated designs, the rating belongs to the defined complete assembly built as specified, not automatically to its individual components.
A project may require different evidence depending on the jurisdiction and specification; all three document types are not necessarily available or required for every purchase. Check the issuer, reference number, date or revision, reported product and applicable scope. A classification report does not by itself establish third-party certification, and a listing record may not reproduce the underlying test data.
What Does the Fire Report Actually Cover?
The most important buyer check is whether the fire document actually covers the product and configuration being quoted. The following items should be verified against the document and the proposed supply.
| Check item | What to verify in the document and against the quoted product |
|---|---|
| Product manufacturer and model | Identify the reported manufacturer, product or family, and any permitted variations. Verify how they relate to the actual quoted item. |
| Core type and identification | The core material is identified (for example, mineral wool, PIR, EPS). Confirm the quoted core matches the tested core. |
| Panel thickness and facing configuration | Identify the thickness, facings and any combinations actually supported by the documented test and classification or field of application. Confirm the quotation falls within that scope. |
| Roof or wall application | Confirm whether the document addresses roof panels, wall panels or both. A roof test does not automatically apply to a wall application. |
| Joint and edge details | Confirm the tested joint configuration. A classification for one joint type does not automatically cover a different joint design. |
| Fasteners and support arrangement | Confirm the tested fastening and support conditions. Changes to the support spacing or fastener type may affect the assembly performance. |
| Orientation, mounting and test configuration | Confirm the tested orientation and mounting arrangement. Fire resistance can depend on which face is exposed and how the assembly is restrained. |
| Openings or penetrations | If the construction includes openings or penetrations, confirm whether the tested assembly included them or whether separate detailing is required. |
| Report reference and field of application | Record the number, date or revision and applicable direct or extended field of application, where provided. Confirm the evidence supports the proposed end use. |
Changes to core, thickness, joint, support or installation orientation may affect the applicable classification. Some variations may already be covered by the documented direct or extended field of application; others may not. Ask the responsible technical party for the supporting evidence rather than assuming either that all changes are allowed or that every variation requires a new test.
Example: Two Suppliers Submit Different Fire Documents
This is a hypothetical procurement scenario. It does not represent a real Bingfa certification or a real test result.
Supplier A provides a reaction-to-fire classification document for a finished sandwich panel product. Supplier B provides a fire-resistance classification document for a specified wall assembly using a different panel configuration.
The two documents support different conclusions. Supplier A’s document addresses how the product contributes to fire development under reaction-to-fire test conditions. Supplier B’s document addresses how a specific wall assembly performed under fire-resistance test conditions for a stated period. Neither document establishes the other performance type.
Neither document can be ranked as a better overall fire result, because the assessments are different. If the project specifies fire resistance for a wall, ask Supplier A for corresponding wall-element evidence. If it specifies reaction to fire for the proposed panel, ask Supplier B for corresponding product evidence. In both cases, confirm the actual quoted model and end-use configuration against the evidence before making a procurement comparison.
Check the Quoted Configuration Against the Document
When comparing a quotation with a fire document, work through a simple three-step sequence:
Quotation product → Reported product → Proposed application.
First, identify the product in the quotation: model, core, thickness, facings, application (roof or wall), joint type and any specified accessories. Second, identify the product in the fire document: the same fields, together with the report reference and field of application. Third, confirm that the proposed application falls within the tested and classified scope.
Where the quoted model, facing, thickness, orientation or construction differs, ask the supplier to identify the documented basis for that variation. Depending on the applicable system, this may be a permitted direct or extended field of application, a relevant classification or a competent technical assessment supported by suitable evidence. Do not extend the scope by commercial assumption alone.
If you have a panel quotation and a fire report, send the project location, roof or wall use, quoted model and document reference so the requested supply and documentation can be clarified.
Discuss Your Panel Fire-Performance Requirements
What to Ask Before Ordering
Ask for a comparison that links the project requirement, the specific product offered and the supporting fire documentation. The information may be supplied across several documents rather than one standard form.
- Project requirement: country, building use, roof or wall application, required fire-performance type, governing standard and edition, and the responsible project reviewer.
- Quoted configuration: manufacturer and model, core, panel thickness, facings, joints and, where relevant, supports, fixings, orientation, penetrations and mounting details.
- Evidence and differences: the test or classification report or listing reference, issuer, revision and stated scope; identify any differences from the proposed supply and the evidence supporting them.
Final fire strategy, local approvals and assessment of project suitability remain with the appointed fire-safety and design professionals and the relevant authorities. Bingfa can discuss the quoted panel supply package and the product documentation actually available for that package; no specific rating or certification should be assumed without matching evidence.
For product options, see sandwich panel materials, the EPS/PU/rock-wool comparison and the rock wool roof panel reference.
Frequently Asked Questions
Is a non-combustible core enough to prove a fire-rated sandwich panel assembly?
No. Even if the core has supporting evidence of non-combustibility, that evidence does not establish a fire-resistance classification for a roof or wall element. The specified construction, including relevant joints, fixings and supports, needs applicable fire-resistance evidence and a documented field of application.
Can a reaction-to-fire classification replace a fire-resistance report?
No. Reaction to fire under BS EN 13501-1 and fire resistance under BS EN 13501-2 answer different questions. A product reaction-to-fire class cannot substitute for the required fire-resistance evidence of a specified building element or assembly, nor vice versa.
Does a fire test report apply to every panel thickness and joint?
No. The evidence covers the tested construction and any additional variations supported by its stated direct or extended application. A different thickness, joint, fixing or orientation may or may not be covered. Check the documented range before using the report for the quoted panel.
What should I request if the fire report does not match the quoted panel?
Request the document identifying the proposed model and construction, plus the permitted application range or a competent assessment supported by the relevant evidence, as appropriate to the project. If the difference cannot be substantiated, do not present the original report as covering the quoted configuration.
Send the project location, actual roof or wall panel configuration, required fire-performance type and existing reports to clarify the proposed supply and supporting documents.
Request a Sandwich Panel Supply Review