Roofing Material Compatibility Guideline

Which roofing material should not be combined?

Aluminum and Copper should not be combined as roofing materials due to the risk of galvanic corrosion.

Roofing materials play a crucial role in the longevity and durability of a roof. It is important to choose materials that are compatible with each other to avoid any potential issues, such as galvanic corrosion.

Galvanic corrosion occurs when two incompatible metals come into contact with each other in the presence of moisture or an electrolyte. In the case of Aluminum and Copper roofing materials, when they are combined, the difference in their electrochemical potential can lead to a rapid deterioration of the metals.

Aluminum is a relatively reactive metal, while Copper is less reactive. When these two metals are in direct contact, the Aluminum acts as the anode and the Copper as the cathode in a galvanic cell, resulting in the corrosion of the Aluminum.

To prevent galvanic corrosion and ensure the longevity of the roof, it is recommended to use compatible roofing materials. Some examples of compatible combinations include Structural Steel and Aluminum, Stainless Steel and Copper, and Stainless Steel and G.I.

By understanding the compatibility of roofing materials and avoiding combinations that can lead to galvanic corrosion, you can protect your roof from damage and extend its lifespan.