What material is recommended for slate nails to prevent rusting?

Copper is recommended for slate nails to prevent rusting due to its superior resistance to corrosion. Slate roofing is typically installed using nails that must withstand various weather conditions without degrading. Unlike materials such as steel, which can rust over time when exposed to moisture, copper does not rust and maintains its integrity over time. This property makes copper an ideal choice for use in conjunction with slate, as it complements the longevity and durability of the slate itself. The inherent quality of copper helps ensure that the fasteners do not compromise the roofing system's overall performance, extending the life of the installation and reducing the risk of leaks or other issues associated with rusted fasteners. Other materials like aluminum may also resist corrosion, but they do not provide the same level of strength and durability that copper offers in this specific application.