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Our Founders Website -> Locate A Certified Roof Cleaner | Roof Cleaning Institute Of America -> Shingle Roof Cleaning Training Forum -> Why are some areas UN-STREAKED?
Post Info TOPIC: Why are some areas UN-STREAKED?
bnkeenan


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Why are some areas UN-STREAKED?
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Why when we see a heavily streaked roof, there are usually numerous areas that are directly below a vent pipe, or a dormer perhaps that are completely UN-STREAKED???

Like in the attached pic, you can see the typical thing I'm talking about, where the roof is clean directly below the vent pipes?  It does not seem logical that an airborne organism avoids that particular location.... so can anyone explain?



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Bob Keenan

Pressure Washing, Roof Cleaning Aiken, SC

 
Apple Roof Cleaning Tampa FL (813) 655-8777


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It is the Zinc in the galvanized metal that leeches out, creating a fungicide that stops growth right below it, and also the vent pipe prevents water from running right below it. Water runs around the vent pipe, so the area right below stays a little bit drier then the rest of the roof.

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Confident Roof Cleaning Houston TX


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Its the same idea as putting zinc or copper strips on the roof line. Only problem is that they dont work that well.

As you can see if the picture below on the before shot only the very top, maybe 1 or 2 feet is clean. Thats because of the mansard style roof and metal flashing rim on top.

Bank roof cleaning Richmond Texas

Bank roof cleaning Richmond Texas

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Rhodes Roof Cleaning Lakeland FL (863) 660-2569


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Here is one we cleaned that had zinc strips. You can see how much they kept clean.DSC_0362.jpg

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Simply Glass


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Confident Roof Cleaning Houston TX wrote:

Its the same idea as putting zinc or copper strips on the roof line. Only problem is that they dont work that well.

As you can see if the picture below on the before shot only the very top, maybe 1 or 2 feet is clean. Thats because of the mansard style roof and metal flashing rim on top.

Bank roof cleaning Richmond Texas

Bank roof cleaning Richmond Texas


That is awesome! Im guessing you used a lift? Any during pics.

 



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DeJay Brock
Louisville,Kentucky
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Roof Cleaning Louisville KY
Confident Roof Cleaning Houston TX


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No we sprayed from the ground. The Fatboy is awesome!! Lol

No we actually went up through the middle and brought the hoses up with a rope and sprayed from the top.

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Roger


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Some pictures of zinc strips in action !! Installed in 1998, same time roof was installed.

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Roger D. Smetana
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Simply Glass


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Nice work.



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Roof Cleaning - Pressure Washing - Window Cleaning
DeJay Brock
Louisville,Kentucky
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Roof Cleaning Louisville KY
Roof Cleaning Northern Virginia (571) 250 9650


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Roger's pictures of the zinc strips in place (and not working) are priceless! I've been asked twice in the last month (the second time was just this evening) about 'preventative measures', zinc strips etc.

Rather than dismissing them as not effective (which appears to be a biased response due to our profession), I now have factual photos to show the informed customers.

Thanks again Roger for allowing me permission (via PM)  to use them in my portfolio.  I can't say thanks enough!


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And the most common area is always the north side. Hence the evryday million dollar roof cleaner phrase "Northern Exposure".



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