Lightly scrub the shingles.
How to clean dark spots off roof.
It is important that the roof be wet when the cleaning mixture is applied or it may.
Spray the oxygen bleach mixture onto the shingles.
The oxygen bleach starts to go ahead and attack the roof algae and it does its best to kill it and take away the stains.
While specialized eco friendly roof cleaners are available they are a little more.
Gently use your brush to scrub the algae off of the shingles.
Pour all of these ingredients into a pump type garden sprayer the type often used for applying liquid fertilizers and spray them on the roof using long even strokes.
How to remove black stains from roof shingles.
Do shingles on your north west or other shaded roofs have streaky moldy stains.
Apply one coating of oxygen bleach to the darkest stained areas first then coat the entire shingled surface with the spray.
Once you ve reached the roof spray your stain remover solution onto the stained areas.
How to clean roof stains wash your shingles where the sun doesn t shine.
Wet down the roof with water from the garden hose.
Cleaning moss and algae 1.
Bring your garden hose or water sprayer up to the roof.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
Make your shingles last longer.
Follow this by spraying another coat of the oxy bleach onto the darker stains.
Take a scrub brush.
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.
Have your friend hold the ladder for you as you climb up to roof with your bucket in hand.
Apply your rubber roof cleaner using a spraying mechanism.
Soak the shingles with water.
Spray your cleaning solution.
Starting from the bottom.
What you do is put it into a pump sprayer spray it on the roof and you need to keep the roof wet with the solution for about 10 or 15 minutes.
Fill a large bucket with 1 gallon of hot water 1 qt.
Here s how to clean the.
7 use a sponge mop or soft bristle brush if it is very dirty to activate the cleaner using a circular motion.
Black streaks on the north and west facing and shaded.
Allow the bleach to remain on for 15 to 20 minutes then rinse it off with a hose.
It s best to start at the top of the roof and spray down since spraying water up at your shingles can loosen them.
Allow the solution to sit for about fifteen minutes on the problem areas.
