40mm isoboard ceiling boards

40mm Isoboard Ceiling Boards are South Africa’s premium rigid XPS ceiling insulation solution. These high-density extruded polystyrene boards combine excellent thermal performance (R-value 1.52) with structural strength, creating a finished ceiling in one easy step. Tongue-and-groove edges ensure seamless installation, while the closed-cell structure provides zero moisture absorption and long-term durability. Available in lengths up to 8 m and 600 mm wide, they are perfect for nail-up ceilings, suspended systems or retrofits. Self-extinguishing and SANS-compliant, 40mm Isoboard Ceiling Boards deliver enhanced energy savings, stable indoor temperatures and a modern, paintable finish without sagging or maintenance.