Step 2 take safety precautions.
How to remove roof stains.
Black streaks on the north and west facing and shaded.
Since you ll be working with a bleach mixture make sure that any greenery in the vicinity is covered up to avoid.
Step 3 mix cleaning solution.
Step 4 apply solution.
Make your shingles last longer.
How to remove roof stains.
Step 1 cover foliage.
Allow the bleach to remain on for 15 to 20 minutes then rinse it off with a hose.
Rinse from the top of the roof down to avoid re staining the shingles with the dirty water.
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.
Next position your ladder against your home and make sure it s secure.
Here s how to clean the.
Allow the oxygen bleach to sit on the shingles for 20 minutes.
Use your garden hose to soak the affected area.
How to clean roof stains wash your shingles where the sun doesn t shine.
Do shingles on your north west or other shaded roofs have streaky moldy stains.
Cleaning the shingles first choose a non corrosive roof cleaner from your local home improvement store.
After that mix one part cleaner with six parts water in a pump sprayer.