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Low density board photo gallery
James Hardie manufactured LDB as a material with the asbestos bonded to a calcium silicate. This material had brand names of 'Asbestolux' and 'Duralux'. Both were manufactured in thicknesses of 4.5mm, 6.5mm, 9.0mm and 12mm and they had either a bevelled, square edge or a recessed edge for flush jointing. (the jointing cement was also manufactured with asbestos).
LDB was manufactured as flat sheets and with perforations to assist with noise attenuation.