What safety concern is associated with galvanic action?

Galvanic action, also known as galvanic corrosion, occurs when two different metals are in electrical contact in the presence of an electrolyte, such as water. This process leads to one of the metals corroding more rapidly than it would alone, while the other metal may corrode less or not at all. This reaction is particularly concerning in roofing applications where different metal materials, like aluminum and copper, are used together, as it can compromise the integrity of the materials over time.

Understanding galvanic action is especially important for roofers and builders, as it can result in significant material degradation, which can compromise the roof's longevity and overall safety. Therefore, effective design and material selection should always consider the potential for galvanic corrosion to prevent costly repairs and unsafe conditions.