Step 3 mix cleaning solution there are a few ways you can mix bleach but the most common is to take one part chlorine bleach three parts water and a sprinkle of liquid laundry detergent or tsp.
Roof stains away.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
They spray it on the roof and wait for it to dry and then re apply it several times as needed.
Power wash or brush clean damages the roof shingles by breaking away the granules that protect color the roof.
Extractive bleeding stains on asphalt roofs see extractive bleeding on shingles and see roofing material defect.
Lichens growing on building surfaces lichens are not the.
Fungi and other stains on the roof become slick when wet so you ll need to wear a harness or safety rope hard hat and have a sturdy ladder nearby.
Here s the recipe for creating the perfect bleach solution.
Re roof an expensive option.
Your roof likely has more useful life.
Roof cleaning contractors who use sodium hypochlorite chlorine bleach mix it in high concentrations with other chemicals such as trisodium phosphate also known as tsp.
Use a cleaner specially made for killing algae or by spraying a mixture of one part bleach to four parts water with tsp trisodium phosphate or other detergent added in a garden pump up sprayer.