Metal Sheets

Sheets of lead, copper, aluminium could be used as DPC. These sheets are of flexible kind. Lead sheets are quite flexible. They are laid same to the bituminous felt. Lead sheets have the benefits of being resistant to ordinary atmospheric corrosion, completely impervious to moisture, and capability of taking complex shapes without fracture and resistant to sliding action. It does not squeeze out under ordinary pressure. Thus, it might be corroded while in contact along with lime or cement. A coating of bitumen should, thus, protect it. Copper sheets of minimum 3 mm thicknesses, are embedded within cement or lime mortar. It has high resistance, high durability, to dampness, and high resistance to sliding and reasonable resistance to ordinary pressure. Aluminium sheets, if used, should be protected along with a layer of bitumen. It is not as good as lead or copper sheets.