Guest User
How do I clean an 11 year old Union Metals galvalum clay colored roof that repeated gets red to black colored areas on it. The pitch is 10/12 and hard to reach with pressure washer. Red areas come back quickly.
Todd Miller
Isaiah Industries, Inc.
Have you ever tried products that you spray on like Wet and Forget or RoofWash? I would suggest trying them in a small area first and see what happens but I have heard of success with them, That said, I have no way of knowing the paint chemistry on your roof -- hence the trial area first.
809 jaway
cleaning the roof by power washing or with a TSP solution Then could paint again

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