With a history of continual product innovation, technical progression and an unrivalled product and service package spanning 90 years, Celotex remain the insulation specialist of choice. In September 2012 Saint-Gobain, the world leader in the habitat and construction markets, acquired Celotex. In June 2011, Celotex achieved a ‘best in class’ lambda value of 0.021 W/mK for its FR range, which delivers better U-values and thinner solutions. This thermal performance improvement has been validated by the BBA. In 2008 Celotex' plasterboard laminate PL4000 was launched offering the perfect solution for dry-lining applications. In 2008 FR4000 was launched and possessed Class O fire performance with a lambda value of 0.022 W/mK, which was not available from any other PIR manufacturer.