Important Information: For all updates and Celotex announcements since June 2017, please see the links below...  See more

Declared lambda values - Read more >

5000 Class 0 testing - Read more >

Rainscreen cladding & RS5000 - Read more >


Celotex started in the 1920's - here is a brief history.

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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.


2002 saw Celotex and Sundeala de-merge and the Celotex Head Office was relocated to Hadleigh. Five years later Celotex launched a new range of thickness, with its 165mm and 200mm boards, earning the company a position as the provider of both the thinnest and thickest PIR insulation.



The 1990s saw Celotex Ltd acquire the Sundeala business out of administrative receivership for £3.2 million.


In 1980 the manufacture of rigid polyisocyanurate (PIR) foam insulation commenced at Hadleigh, which launched the Celotex double-R brand in the UK with Factory Mutual approval to highlight its excellent fire performance.


In the early 1970s the Celotex Corporation of America introduced a new product line which was proving very popular. The product in question was an isocyanurate foam ceiling tile. This product led directly to the 1978 decision to invest in a new PIR foam board manufacturing line at Hadleigh, Suffolk which would ultimately enable Celotex to develop our current product range


In 1966 the decision was taken to close the Stonebridge Park factory. The 14 acre site was sold and a site at Hadleigh, Suffolk was acquired. The new warehousing and distribution facility was opened in Hadleigh in 1968.


The continued growth of Celotex Limited, fuelled by post war reconstruction work, led to the installation of a new insulating board line to meet growing demand. This was followed a few years later by the introduction of a new hardboard manufacturing line.


By the 1930s sales in the UK were sufficiently high to encourage the Celotex Corporation to open a manufacturing plant in the UK at Stonebridge Park. By 1937 the Celotex Company of Great Britain was firmly established in the UK and had commenced manufacture at its new plant.


The Celotex Company of Great Britain started trading in 1925 from offices located in Australia House in The Strand, London. The business was a subsidiary of its parent company, the Celotex Corporation of America, and soon established itself as an importer of bagasse fiberboard insulation from the original Celotex manufacturing plant in Marrero in the state of Louisiana, America.