weird roof stain

[Joe Ortiz]

Hey guys Im another newbe.I was wondering if anyone can help me with a roof stain.I have never seen this type of stain before.The stain is on a blue asphault shingle roof,and looks like a coffe stain on a white shirt.there are some palm trees about 70'away & thought it might be sap .I was wondering if any one had run across this.(just like to know what i am up against.)What will remove it?(it has spread about 10' in the last month.Thanks for your help.

[Apple Roof Cleaning]

It may be sap.
I would try and hit it with Apple Sauce first
Making "Apple Sauce" Roof Cleaning Mixture

The TSP in the Apple Sauce may do the trick.
For maximum cleaning effectiveness of Apple Sauce, wait until on site, or on the way to the job to mix the Borax in.

If the Apple Sauce don't clean it after a few sprays, then here is step two.
Add a LITTLE Sodium or Potassium Hydroxide to the mixture, about 2 to 3 percent.
We have found the addition of a SMALL amount of Sodium Hydroxide to the mixture useful for very stubborn stains.
Remember, ALL Sodium Hypochlorite contains some Sodium Hydroxide.
The KEY here is moderation, a little can be good for impossible stains, and a lot is definitely bad.
Be sure and allow 15 to 20 minutes dwell time, and re spray if need be.
I have had to re spray up to 5 times to clean really tough stuff.

[814jeffw]

You may need to also get up close and take a look at it. Sometimes a little up close investigation can reveal a simple answer. Maybe not always the answer you're hoping for though. If you already did this disregard my post.

Jeff