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Old 07-14-2013, 11:44 PM   #1
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How to easily get rid of the dark streaks on the roof shingles from the ground?


A house roof shingles have dark streaks. I cannot climb on the roof but can use hose spray from the ground. Do you have good ideas to get rid of the dark streaks on the roof from the ground? See a picture here. Thank you.
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Old 07-15-2013, 05:45 AM   #2
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How to easily get rid of the dark streaks on the roof shingles from the ground?


http://www.inspectapedia.com/roof/shinglestains.htm
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Old 07-15-2013, 10:50 AM   #3
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How to easily get rid of the dark streaks on the roof shingles from the ground?


It looks like roof algae problem. Can anyone provide tips to clean it by the garden hoses from the ground?
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Old 07-16-2013, 01:22 PM   #4
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How to easily get rid of the dark streaks on the roof shingles from the ground?


Contact the maker of your shingles?
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Old 07-16-2013, 02:16 PM   #5
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How to easily get rid of the dark streaks on the roof shingles from the ground?


The roof has already been there for more than 10 years. I do not know who is the maker of the roof shingles. I have tried the Zep House & Siding Pressure Wash but it is not effective. Hope someone can provide ideals to clean the dark streaks on the roof.

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Old 07-16-2013, 02:21 PM   #6
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How to easily get rid of the dark streaks on the roof shingles from the ground?


You can use a 50/50 mixture of bleach and water. Be sure to water any plants and grass in the splash area as the bleach could kill them.
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Old 07-16-2013, 02:29 PM   #7
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How to easily get rid of the dark streaks on the roof shingles from the ground?


Are you unable to get on the roof?
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Old 07-18-2013, 10:51 AM   #8
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How to easily get rid of the dark streaks on the roof shingles from the ground?


I am unable to climb the roof because it is too slippery. I contacted the CertainTeed. They recommend two cleaners Shingle Shield and Safers moss and algae remover. Has anyone ever tried or head about them and which store carries them?
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Old 07-18-2013, 12:28 PM   #9
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How to easily get rid of the dark streaks on the roof shingles from the ground?


You need to get on the roof and spray down. If you use a pressure washer and spray up you run the almost certain risk of getting water under your shingles.
You might want to try a ladder with a roof hook, or you could stage it with roof brackets.
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Old 07-18-2013, 12:37 PM   #10
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How to easily get rid of the dark streaks on the roof shingles from the ground?


"how to easily..."

There's not always an easy way to do things, unfortunately, and this is one of them.
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Old 07-18-2013, 03:25 PM   #11
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How to easily get rid of the dark streaks on the roof shingles from the ground?


Quote:
Originally Posted by TheBobmanNH View Post
"how to easily..."

There's not always an easy way to do things, unfortunately, and this is one of them.
If you do not know it, just watch instead of providing useless idea.
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Old 07-18-2013, 03:36 PM   #12
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How to easily get rid of the dark streaks on the roof shingles from the ground?


Spraying upwards is a very bad idea.
Shingles are designed to shed water from the top down, introducing pressurized water in the opposite direction of what their designed for will have wet consequences. Most shingles have 2-3" of headlap(coverage over the joints) at most, it will take very little pressure to overcome that.
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Old 07-18-2013, 03:46 PM   #13
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How to easily get rid of the dark streaks on the roof shingles from the ground?


Quote:
Originally Posted by PatChap View Post
Spraying upwards is a very bad idea.
Shingles are designed to shed water from the top down, introducing pressurized water in the opposite direction of what their designed for will have wet consequences. Most shingles have 2-3" of headlap(coverage over the joints) at most, it will take very little pressure to overcome that.
I am working on it. The tool is using the pressure wash gun but do not set the pressure very high. The only problem is to select the best cleaner. I have seen the HD carries the M-1 Deck & Roof Cleaner that has good rating. But, I am still looking for the cleaner that the CertainTeed recommended.
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Old 07-18-2013, 05:22 PM   #14
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How to easily get rid of the dark streaks on the roof shingles from the ground?


HD will ship the Safer product to the store for free.
You probably have to get Shingle Shield online.

https://www.shingleshield.com/
http://www.homedepot.com/p/Safer-Bra...4#.Uehp9m3lfms
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