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Old 09-17-2012, 10:23 PM
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grandview (2006) grandview (2006) is online now
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I thought I heard they are adding copper to the roofing mix to stop this.
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Old 09-17-2012, 10:31 PM
lkendall lkendall is offline
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im not sure about copper? but i know they do have a option now for shingles that can resist the mold better, im not sure what the additive is now however I do know that it is more expensive
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Old 09-18-2012, 10:52 AM
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Quote:
Originally Posted by lkendall View Post
im not sure about copper? but i know they do have a option now for shingles that can resist the mold better, im not sure what the additive is now however I do know that it is more expensive
Great looking results with that low pressure roof cleaning!

Algae Resistant (AR as they call them) shingles are coated with a copper oxide, but the warranty is only 8-15 years depending on the brand and quality level opf the shingle.

Keep up the great work.
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