Apply roof be clean just spray it on after proper dilution as directed with an.
Roof stains away.
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.
Green roof stains on roof shingles clay tiles cement tiles and asbestos cement roof shingles or newer fiber cement.
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.
Here s the recipe for creating the perfect bleach solution.
Extractive bleeding stains on asphalt roofs see extractive bleeding on shingles and see roofing material defect.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
Re roof an expensive option.
They spray it on the roof and wait for it to dry and then re apply it several times as needed.
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.
Power wash or brush clean damages the roof shingles by breaking away the granules that protect color the roof.