37.5mm Celotex PL4025 Insulated Plasterboard 2400mm x 1200mm

Insulated plasterboard, measuring 37.5mm in overall thickness for use on internal walls and ceilings.Manufactured as part of the PL4000 range, it combines a rigid polyisocyanurate (PIR) insulation core with a 12.5mm tapered-edge plasterboard lining. This dual-purpose construction improves thermal performance while providing a surface that is ready for direct decoration.The PIR layer is faced with foil to enhance insulation and act as a vapour control barrier, reducing heat loss and helping to manage moisture within the building fabric. The bonded plasterboard eliminates the need for a separate lining, saving time on site and ensuring a neat internal finish.At 37.5mm thick (25mm PIR plus 12.5mm plasterboard), it is the most widely used size in the PL range, offering a practical balance between insulation performance and minimal loss of internal floor space.