Saturate the shingles especially those with rust stains.
How to rust offclean roof shingles.
Rust stains on shingles use to be very difficult to remove without damage.
Clean off your roof.
That ll prevent the cleaner from drying out too quickly.
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Before the vinegar dries but after it sits on the rust for a little bit about five to 10 minutes on an overcast day scrub it with the push broom or the scrub brush.
Hello i have a chimney that the cap rusted on and stained my shingles.
Spray the roof with the vinegar.
Work your way across the roof from left to right and top to bottom.
Pour it into a pump sprayer strap yourself into a full body harness tie it down and climb to the roof.
This will help you identify the source of the rust stains usually metal nails holding the shingles in place and also remove any additional dirt and grime that makes rust removal more difficult.
Tackle tough rust stains with oxalic acid.
Before applying the cleaner spray the roof with water to cool it down.
I have ashpalt shingles light gray and the rust is noticable.
I tried clr calcium lime rust remover with a brush.