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theamazingbolts wrote:

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More pics of foreign material around fireplace area to be aware of when cleaning shingle roofs.....Ask your homeowners if they burn Synthetic logs and test your shingles to avoid chemical reaction that discolor shingles!

 

Dante Rodriguez

Bay Area Roof Cleaning Co.

 

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 Welcome Dante! I posted what you sent me here http://roof-cleaning-institute.activeboard.com/t57563967/omg-looks-like-it-ruined-the-roof/

That is good info to be aware when roof cleaning composite roofs.  Thanks for the post! 

How did you come to attribute it to Synthetic logs?

 

I'm curious as well how this was attributed to synthetic logs. A lot of people burn these synthetic logs and have roofs cleaned with no issues. Was there a certain brand of log? Any chance the home owner (or previous HO) may have treated their roof with one of those roof sealants that may have reacted with the cleaning solution?

How was this handled in the end with the customer? I read the shingle manufacturer passed the blame off to you, even though you were doing everything exactly right the way the ARMA suggests. Did this fall back to your insurance anyway?

opie451 wrote:

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Before blaming the syn. logs I would look to the chimney itself. Looks like it has recently been restored and no soot build up on the cap. Ya know painters and masons use acids to clean and make cementious surfaces more porous . I would think that would be the culprit. Warn the HO,Clean the roof,move on.

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You have a very good point there Thomas.  I'd be curious to see if anyone has experienced this problem with a non-masonry clad chimney.  If yes, the the synthetic log concern may have some legs.  Otherwise, you've likely nailed it.