Pirmax HRP panel is a modified PIR (Polyisocyanurate) rigid thermal panel with 10mm plasterboard attached. The reverse side of PIR core is foil faced. Pirmax PIR insulation is the next generation in high performing insulators for commercial and residential developments and is designed to achieve excellent thermal value where minimal cavity is required.It has the highest thermal value of any PIR insulation product available due to the low thermal conductivity, giving buildings continued thermal efficiency throughout their life span. Pirmax PIR rigid panel is a light weight closed cell Polyisocyanurate foam core panel providing easy handling and fast fixing to any substrate and application.