<Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2013) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2013) (Learn how and when to remove this template message) </Td> </Tr> <P> Asbestos insulating board, also known as "AIB" or by the trade name "Asbestolux", was an asbestos containing board used in the building trade because of its excellent fire resistance and heat insulating properties . These boards were commonly used in the UK from the 1930s up until production was terminated in 1980 . AIB tended to contain 25 - 40% asbestos, with amosite being the most common form of asbestos used, although a mixture of amosite and chrysotile was also common, and crocidolite was sometimes used in older boards and some marine boards . </P> <P> AIB is softer, more porous and less dense than asbestos cement . This and the fact it contains between two and three times more asbestos than cement makes it far more friable and thus a greater health risk if the boards are disturbed or in poor condition . </P>

Asbestos insulating board (aib) was most widely used as