SC Roofing Practice Questions - South Carolina Roofing Contractor Examination Exam

A Galvalume steel panel roof must receive copper step flashing at a masonry chimney. The correct detailing is to:

Solder the copper directly to the Galvalume pan for a permanent bond Use steel screws through both metals with no separator Isolate the dissimilar metals with a nonconductive separator or use a compatible flashing metal, because copper ions will corrode galvanized/Galvalume steel Paint the copper with roof cement; no other isolation is required

Correct Answer:

Isolate the dissimilar metals with a nonconductive separator or use a compatible flashing metal, because copper ions will corrode galvanized/Galvalume steel

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