BRANZ provides fire testing services and assessments of variations to tested systems and of performance to alternative standards.
BRANZ can provide advice on the most appropriate test to meet the new Building Code requirements. Our fire laboratory is accredited to carry out testing to both relevant standards - ISO 9705 and ISO 5660.
Classification of interior surface finishes
Interior surface finishes are classified from Group 1 (best) to Group 4 (worst) based on their measured time to flashover in the ISO 9705 fire test:
Test methods and results
The reference test method is ISO 9705 - a full-scale fire test (ISO room test) - but most materials can be assessed using the small-scale test method ISO 5660 - the cone calorimeter test.
Materials that are unlikely to be suitable for testing in the cone calorimeter include those with foil facing or thin aluminium coverings on combustible cores and composite products with complex jointing systems where the ISO room test is the only suitable method.
The results of tests to ISO 9705 and ISO 5660 can also be used with compliance document Verification Method C/VM2 for fire safety, which can be applied to fire designs to demonstrate compliance with clause C of the New Zealand Building Code. Design Fire Scenario 8 (DFS8) applies to interior surface finishes within the Framework for Fire Safety.
The proposed change aligns the testing requirements of the New Zealand Building Code with the Building Code of Australia.