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Old 02-03-2013, 02:17 PM   #1
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Gray roof turns black


I have a 20 year gray roof. It is not missing any shingles, even after Sandy. Edges are not curling up or have missing pieces.
The roof looks horrible. It is mostly black or looks dirty. What would be the cause of this?

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Old 02-03-2013, 02:22 PM   #2
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Gray roof turns black


An air born fungus, very common.
http://www.atlantahousingsource.com/...fing-shingles/

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Old 02-03-2013, 02:42 PM   #3
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Gray roof turns black


Do you know where to find TSP?

After it is cleaned, can I use copper flashing at the ridge? I guess it must stick out some.

I live on Long Island.
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Old 02-03-2013, 02:54 PM   #4
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Gray roof turns black


Any hardware, Wal-Mart, box store will have it.
Keep in mind on a 20 year old roof it's going to do more damage then good, and most likly will just return again.
Go trying to pry up shingles that old to install copper or zinc strips will be almost sure the break some.

Any new shingles installed will have a midicide in the granual mix, mostly likly copper.
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Old 02-03-2013, 03:30 PM   #5
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Gray roof turns black


I had called my roofer but, he hadn't called back.

With a new roof I will choose that type of shingle.

Thanks
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Old 02-03-2013, 03:32 PM   #6
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Gray roof turns black


It would be hard to find one that did not have it already.
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Old 02-03-2013, 04:38 PM   #7
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Gray roof turns black


You can get TSP at Sherwin Williams Paint store. I buy it by the case in the one pound boxes. Mix it in with warm water, and bleach and you have a great Multi Purpose cleaner.
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Old 02-04-2013, 09:51 AM   #8
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Gray roof turns black


Thanks goes to joecaption and jagans.


Last edited by JohnK324; 02-04-2013 at 09:55 AM.
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