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#11
09-17-2012, 09:23 PM
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I thought I heard they are adding copper to the roofing mix to stop this.
__________________
www.grandviewlandscaping.com 
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#12
09-17-2012, 09:31 PM
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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
__________________
www.kendallscapes.com Roof & Exterior cleaning Maryland Roof Cleaning Delaware Roof Cleaning
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#13
09-18-2012, 09:52 AM
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Quote:
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.
__________________
Ted Saunders
American-ProTech (571) 250 9650 Roof Cleaning Northern Virginia Roof Cleaning Northern Virginia Serving the greater Manassas area Serving Fairfax County Keeping Virginia Beautiful One Roof At a Time
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