Guest User
3/28/2017
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.
3/28/2017
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
4/12/2017
cleaning the roof by power washing or with a TSP solution Then could paint again

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