Lightly scrub the surface until the area is free of mildew or mold.
Osphate cleaning concentrates for metal roofs.
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.
We use a 5 5 gallon system just for this reason.
1 3 cup of powdered laundry detergent 1 quart of bleach 5 solution 3 quarts of water.
It certainly will deliver on its promise which is to eradicate any signs of mossy growth or dark streaks.
Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.
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.
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.
Tsp can be very difficult to mix hot water is recommended but not needed here is a simple method.
Dip a soft brush or rag in the cleanser and apply to affected areas.
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 s unreal how well this stuff works.
Some spots got cleaned so well i could see shiny bare metal.