Working with lead sheets is one of the oldest and most durable roofing materials and used 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.
Small patches of lead sheet may be carefully welded over any splits to form permanent repairs. The lap joints should be used to strengthen and to prevent penetration of the flame through the lead. Roll ends are a common point of failure and the whole section may be cut out so that a new pre-fabricated roll end can be welded into position.