What is galvanic action in the context of roofing?

Galvanic action refers to the process that generates electrical currents between dissimilar metals when they come into contact in the presence of an electrolyte, which can lead to corrosion. In the context of roofing, this is particularly important because roofing materials often include various metals that may interact with one another. If two different metals are used in a roofing system, and they become electrically connected, the more reactive metal may corrode at an accelerated rate. This corrosion can compromise the integrity of the roofing structure and lead to leaks and other problems.

Understanding galvanic action is essential for selecting compatible materials in roofing design and installation. By preventing the contact of dissimilar metals or utilizing barriers, roofers can mitigate the risk associated with galvanic corrosion, preserving the lifespan and functionality of the roofing system.