Sand Cast Sheet
The Romans first used sand cast sheet for water ducts and storage tanks. Its use was extended by the Normans to include roofing applications. Many church and cathedral roofs originally used sand cast sheet and records show the material has an outstanding lifespan when fitted correctly.
Today, the traditional method of manufacture continues, with molten lead being poured across a prepared bed of sand and then “skimmed” to the required thickness. The material is mostly hand-produced by a small number of specialist companies, providing sand cast sheet primarily for its rough grain aesthetic appearance or where there is a requirement on an historic property to replace “as existing”.
Its past performance record is generally due to the overall thickness and weight of the sheet used, with a 12” (305mm) square traditionally weighing 6 – 8lbs (2.7 – 3.6kg).
Sand cast sheet is not produced to any fixed chemical composition, it is not made to any British and European Standard, it does not have an Agrément Certificate.