Dissimilar metals

Which roofing metals can touch, which cannot, and how to separate them.

5 min · 8 slides · 4 questions

Slide 1 of 8

What happens

Galvanic corrosion occurs when dissimilar metals are in contact, or connected by runoff, in the presence of moisture.

Remediation means physically isolating the metals and replacing the corroded, less noble part.

Sources