consist of a rigid polyurethane foam core enclosed between two metal-facing sheets. PIR Panels PIR panels feature a polyisocyanurate foam core. These panels provide effective insulation along with enhanced fire performance. EPS Panels EPS panels use an expanded polystyrene core placed between two outer sheets. Rockwool panels Rockwool panels use a noncombustible mineral wool core manufactured from natural rock materials. Glass wool panels The glass wool panels contain an insulation core made from fine glass fibres. Know more about PUF panels here.