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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?
9/8/2008
Isaiah Industries, Inc.
9/10/2008