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Anybody had their roof professionally cleaned? Login/Join 
Bad dog!
Picture of justjoe
posted
I got a flyer in my mailbox advertising a roof cleaning service. I'm not sure of the cost-- "10% off." (Uh, okay.) But it says, "The black staining on this roof (with photo) is not dirt be a harmful form of algae called Magma Gleocapsma. It feeds on the limestone filler of asphalt shingles. Left unchecked this... will reduce the roof's useful life."

Is this bullshit? Has anyone here had their roof professionally cleaned? What is a fair price?


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Posts: 11253 | Location: pennsylvania | Registered: June 05, 2011Reply With QuoteReport This Post
safe & sound
Picture of a1abdj
posted Hide Post
I just bought a concentrate from Home Depot (less than $50) and sprayed it on myself.

A roofing buddy told me that copper flashing under the ridge vent will prevent the problem in the first place, so the next time I re-shingle this house I will probably do that.

The only issue I have here are the sections facing north.


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Posts: 15918 | Location: St. Charles, MO, USA | Registered: September 22, 2003Reply With QuoteReport This Post
Member
posted Hide Post
quote:
I got a flyer in my mailbox advertising a roof cleaning service



Yeah flyer in your mailbox is a clue. It is a ripoff. If this is done improperly can cause all kinds of problems.
 
Posts: 17622 | Location: Stuck at home | Registered: January 02, 2015Reply With QuoteReport This Post
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I have never heard of cleaning shingles, ever. I also don't think that it's harmful if they're discolored. Now, if it's directly under a very thick tree and has algae from staying wet, this may be different. We clean tile roofs, but that's strictly an esthetics thing.

If you have or plan to have aluminum gutters, you do NOT want copper flashing it will eat holes in the gutters from galvanic corrosion and you need to use copper gutters at $28 per foot if you have copper flashing on your roof.
 
Posts: 21421 | Registered: June 12, 2005Reply With QuoteReport This Post
Just because you can,
doesn't mean you should
posted Hide Post
I think the discoloration is mostly a cosmetic issue, not safety.


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Posts: 9907 | Location: NE GA | Registered: August 22, 2002Reply With QuoteReport This Post
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Picture of cparktd
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Mildew etc. growing on shingles most likely does hasten their deterioration, but not by much I bet. Some people really find it bothersome and have it cleaned. I expect the cleaning would be as bad for the roof as doing nothing.

Galvanized flashing, like you see around many vent pipes, sheds trace amounts of zinc and kill it as well, like copper will.

I extremely rarely buy services from unsolicited sales / promotions.
If you have a trusted roofer and are concerned I would ask them.



Collecting dust.
 
Posts: 4199 | Location: Middle Tennessee | Registered: February 07, 2013Reply With QuoteReport This Post
Bookers Bourbon
and a good cigar
Picture of Johnny 3eagles
posted Hide Post
quote:
Originally posted by 220-9er:
I think the discoloration is mostly a cosmetic issue, not safety.


^This

I bought and used the stuff from HD. It takes a few months to work, but it works.





If you're goin' through hell, keep on going.
Don't slow down. If you're scared don't show it.
You might get out before the devil even knows you're there.


NRA ENDOWMENT LIFE MEMBER
 
Posts: 7335 | Location: Arkansas  | Registered: November 06, 2010Reply With QuoteReport This Post
Victim of Life's
Circumstances
Picture of doublesharp
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North side of my house is shady to boot so I had the dark streaks start in about year 10 of a new roof. Now it's year 17 and they are very noticeable on the lower half of n side roof. S side is sunny and still looks very good.

One of the sponsers of Reds baseball is an old line Cincy roofer and they advertise a shingle cleaning service pretty heavily. Say it's mold, not dirt. If I ever cleaned them I'd use a mix of about 4 parts water to 1 part bleach and add a couple squirts of dawn. Put it on wet roof w pump sprayer, agitate with a bristle brush or broom. Rinse with a garden hose with spray nozzle. Some use a pressure washer but I'd try hose with a spray nozzle first. No sense needless washing away roof granules.


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God spelled backwards is dog
 
Posts: 4859 | Location: Sunnyside of Louisville | Registered: July 04, 2007Reply With QuoteReport This Post
Only the strong survive
Picture of 41
posted Hide Post
quote:
limestone filler of asphalt shingles. Left unchecked this... will reduce the roof's useful life."

Is this bullshit? Has anyone here had their roof professionally cleaned? What is a fair price?


http://www.askthebuilder.com/roof-moss-video/


41
 
Posts: 11894 | Location: Herndon, VA | Registered: June 11, 2009Reply With QuoteReport This Post
Member
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quote:
If you have or plan to have aluminum gutters, you do NOT want copper flashing it will eat holes in the gutters from galvanic corrosion and you need to use copper gutters at $28 per foot if you have copper flashing on your roof.


YEP.
 
Posts: 17622 | Location: Stuck at home | Registered: January 02, 2015Reply With QuoteReport This Post
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Picture of mikeyspizza
posted Hide Post
The Asphalt Roofing Manufactures Association says that both algae and moss can grow on rootops, and that algae is not harmful but moss can cause problems. Link

Here's a link to homeadvisor.com which shows the national average price range, and you can input yor zipcode and get the prices range in your area. Link
 
Posts: 4068 | Location: North Carolina | Registered: August 16, 2003Reply With QuoteReport This Post
Certified All Positions
Picture of arcwelder
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We use these on customers roofs, who have moss or algae issues.

I recommend them, install once, permanent solution.


Arc.
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Rode hard, put away wet. RIP JHM
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Posts: 27123 | Location: On fire, off the shoulder of Orion | Registered: June 09, 2004Reply With QuoteReport This Post
Bad dog!
Picture of justjoe
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Lots of good info. Thanks to all.


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"You get much farther with a kind word and a gun than with a kind word alone."
 
Posts: 11253 | Location: pennsylvania | Registered: June 05, 2011Reply With QuoteReport This Post
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