Simply mix the bleach and water spread the mix over your roof with a mop and hose the roof off.
Metal roof fungus.
Metal roofing is pricey but resilient.
Do this the right way to prevent further damage or injury.
Bleach kills fungus on contact.
If the roof fungi haven t damaged the structural integrity of the roof you should be able to clean it yourself.
The sodium hypochlorite solution can be made up from commercially available bleaches.
Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.
Depending on where you live your metal roof could come into contact with metal particles that create rust stains on the paint surface of a metal roof.
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Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.
Metal roofs are relatively easy to clean with patience.
You can do this easily with a 1 1 ratio of bleach and water.
Putting a window in your ceiling.
At first you might think the roof has a problem or has begun to prematurely corrode but often times this is not the case.
Most important though is to take some safety precautions before attempting to clean to reduce the chance of injury.
Do it like a pro.
However it is a valuable test as it will distinguish between fungus and normal inorganic dirt which will not be bleached.