IMOS Insulated wall and ceiling panels have the following specifications. 
The external and internal cladding skin is manufactured with 0.60 G300 coated steel to AS1397. Colour to be nominated from BlueScope Colorbond® chart-standard is SurfMist® / PermaGuard™ White (Anti Bacterial). 
The insulated core is available in a choice of 50, 75, 100, 150, or 200mm thick, polyisocyanurate (PIR) with zero ODP. The PIR core bonds to the inside and outside skin during manufacture. 
Flashing are manufactured from 0.55 G300, AZ150 BlueScope Colorbond® Steel and installed to Blue Scope Standards.  

FIRE
In many cases, PIR panel is installed simply because of its superior thermal performance, cost savings and buildability. In these applications, fire retardant characteristics are an added benefit.
In other cases, were specific fire certification is required, PIR can meet the most  stringent performance requirements. PIR has gained approval for both PIR & Mineral Wool core wall and ceiling panels for FN4880-Unlimited height fire approval.  

CERTIFICATION FOR INSURERS polyisocyanurate (PIR) is a global insurer. They test materials and carefully appraise the construction methods vital to fire protection system certification.
Various polyisocyanurate (PIR) apply for defferent applications
•  Wall construction requiring  non combustible ceilings
•  Wall and ceiling  construction class 1, rated to a ceiling height of 9.1  meters or unlimited height  approval as required.

To achieve class 1 approval, performance In the following classifications must be satisfied: 
•  UB 26-3 Room test 
•  ASTM E84 Surface burning  characteristics 
•  ASTM D482 ignition  residue test