RETURN TO I Have An Existing Metal Roof and Have A Question
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I agree with Eric. I would also avoid Chlorine ... if a chemical cleaning is necessary, look at a combination of water, detergent, and TSP. There are also products like RoofWash and Wet and Forget that may work.
Sounds like iron oxide on an originally unpainted steel roof. Not much you can do except enjoy the natural patina and look as it ages.
Any chance you can post a picture of the damage?
Once the Galvalume finish is changed, I don't know of any non-factory processes to bring it back.
I would contact the metal roof manufacturer first.
There are a myriad of roof/house wash products that work quite well and can be bought over the counter.
I would not apply pressure to the roof in this case. It is massively over specified and often inappropriately applied. That is a bad combination.
Hello, my company washes roofs and had the misfortune of slightly damaging a Galvalume roof. On portions of the roof, our cleaning chemicals turned it
a gray color. Is there a chemical to take that grey out and return the Galvalume back to its original color? Thanks
We have black mold on our metal roof. It is colored metal (white). We don't have any trees over the roof. We are hiring a pressure washing person to clean it. He plans on using pool liquid chlorine on it to clean. Will this damage our roof? And he also said that we will need to have it cleaned every few years.
This will cost about $700 this year, and about $400 every year after that.
Any advice?
I have a corrugated cheap metal roof that has not been painted. There's a brown film covering the entire roof. It feels a bit like wet dust. I've tried getting it power washed, but it refused to come off. It seems to wipe away with my hand though. Do you happen to have an idea of what it might be? Is there a certain type of chemical that could remove it?
