Lightly scrub the surface until the area is free of mildew or mold.
Osphate cleaning concentrates for metal roofs.
Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
1 3 cup of powdered laundry detergent 1 quart of bleach 5 solution 3 quarts of water.
Some spots got cleaned so well i could see shiny bare metal.
Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.
We use a 5 5 gallon system just for this reason.
Fortunately quality metal roofs also are one of the easiest types to clean and care for and labor day is an ideal time to consider preparing your roof for the coming season cleaning a metal roof regularly helps reduce damaging elements such as pollution airborne dirt organic material debris pollen and mildew.
It certainly will deliver on its promise which is to eradicate any signs of mossy growth or dark streaks.
It s unreal how well this stuff works.
All in all if you are dealing with metal surfaces roof asphalt or even tough fabric materials as such then 6071 jomax roof cleaner can be one of the best options for you.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.
Rinse the surface well with plain water.
Clean off the loose stuff use a pressure washer if you can paint this on and wait.
I shared my discovery with a friend and he pointed me to the data sheets for this and klean strip s phosphoric prep and etch product.