Using incompatible metals can shorten your roof’s lifespan and compromise its structural integrity. Meanwhile, proper metal combinations will ensure your roofing system’s durability and strength.
Read on to find out what causes galvanic corrosion and ways to prevent it.
Causes Of Galvanic Corrosion
What Is Galvanic Corrosion?
Galvanic corrosion refers to an electrochemical process where one metal corrodes over time when in contact with another metal in the presence of an electrolyte. Water is the catalyst in a metal roof installation since it’s a weak electrolyte.
For instance, steel panels in metal roofing are coated with zinc or aluminum coating to prevent it from corroding. Galvalume coating, commonly used in metal roofing, has taken the place of the galvanizing process. It’s a more effective way of addressing corrosion.
How Do You Prevent It?
Make sure to choose a local contractor with expertise in metal roofing. You can begin looking for a company by searching “metal roofing near me” online. Ask your family, neighbors and friends for referrals. Experienced contractors will know proper metal roofing installation methods that can help extend your roof’s life.
Prevent rust through galvanic corrosion by avoiding mixing metals and always use compatible metals together. Minimizing moisture on the roof surface can also prevent galvanic corrosion. Atmospheric corrosion develops when metal surfaces are constantly exposed to moisture from dew, fog or rain. Make sure your gutters are not clogged. Trim trees surrounding the roof as sunlight can help moisture on the roof evaporate faster.
Copper can also cause galvanic corrosion on roofs. In some cases, an AC unit on the roof may have copper coils. Condensation drips with copper in the water can cause corrosion on metal roofs. In this case, the best solution is to install a PVC piping up the roof to prevent contact with copper.
For your roof replacement, you can count on John Peters Roofing. Our team also specializes in siding and guttering services. Call us at (317) 981-6300 or complete our online form to request a free estimate. We work with clients in Indianapolis and surrounding areas.