asphalt singles with standing seam zinc

Guest User
We are looking at putting Umicore VM Zinc on the low pitched porch roofs on our house. Our concern is the asphalt shingles we have selected for the steeper pitched areas (above the porch areas) contain copper oxide as an algae retardant. We are getting conflicting input regarding the potential risk of corrosion to the zinc caused by the copper granules. Can you please weigh in on this?
Todd Miller
Isaiah Industries, Inc.
I think that ultimately you need to look at Umicore as the authority on this. I would be a little suspect of it though.
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