Can aluminum materials be installed on copper roofing materials?

The use of aluminum materials on copper roofing presents a significant issue due to the galvanic corrosion that can occur when dissimilar metals are in contact with one another, especially in the presence of moisture. When aluminum and copper are connected, the aluminum can corrode more quickly due to the electrochemical reactions that take place. This reaction can weaken the integrity of the roofing materials over time, leading to failures that may compromise the roof and incur costly repairs.

Because of these concerns, the best practice is to avoid the direct installation of aluminum on copper roofing altogether. This helps ensure the longevity and durability of the roofing assembly. While there may be certain situations in which precautions or treatments could mitigate corrosion risks, the fundamental guideline is to refrain from installing materials that could lead to galvanic corrosion.