If lead work is to be properly detailed and fitted it is essential to have a good understanding of the nature and uses of the material, and to follow certain rules of good practice which have been developed from long, and sometimes costly experience. Some of the common causes of failure, fault recognition and appropriate remedial action are explained together with an overview of the material’s characteristic behaviour.
Lead sheet, one of the oldest and most durable roofing materials, has been known to last for over two hundred years. Some lead sheet is still made by the original method of casting molten lead on a bed of sand. This cast lead sheet is produced by specialist firms and is largely used for replacing old lead sheet on cathedrals and churches where authenticity is important.