PIR Insulated plasterboard is a popular 2-in-1 insulation and drylining product that can be used in a variety of building applications. PIR insulated plasterboard combines a PIR polyisocyanurate foam insulation board, which provides thermal insulation and thermal efficiency, with a 12.5mm standard tapered edge plasterboard sheet, and overall thicknesses are expressed as both products combined. For example, a 37.5mm PIR insulated plasterboard is made up of a 25mm PIR board and a 12.5mm sheet of Plasterboard. At Materials Market, we sell PIR insulated plasterboards from Celotex, Kingspan and EcoTherm.