PIR plasterboard is a composite building material that combines a layer of high-performance Polyisocyanurate (PIR) insulation foam with standard plasterboard, providing both insulation and a ready-to-decorate surface in one product. It's designed to improve a building's thermal efficiency, reduce heat loss and gains, prevent condensation and damp, and simplify the construction process by integrating two materials into a single, easy-to-install board.