The 100mm Celotex GA4100 is a high-performance PIR insulation board that measures 2.4m x 1.2m. Designed to offer maximum thermal efficiency with minimal thickness, the Celotex GA4100 is ideal for use in a variety of applications including roofs, walls and floors. Made from rigid polyisocyanurate (PIR), it offers exceptional dimensional stability and fire resistance for enhanced safety and longevity. Its light weight and easy installation make it a popular choice among professionals in the building and construction industry.