How To Remove Black Stains From An Asphalt Roof

Roof cleaned with oxygen bleach left and chlorine bleach center.

How to remove black stains from an asphalt roof.

It is important that the roof be wet when the cleaning mixture is applied or it may. 30 seconds outdoor cleaner. If the streaks don t bother you or you re not ready to invest in a new roof install zinc or copper strips available at roofing centers along the top course of shingles. How to prevent black streaks roof mold.

Be sure to have a friend or family member with you to ensure that you are safe while your climb up and work on your roof. Chomp pro algae mildew stain cleaner. A mixture of trisodium phosphate tsp bleach and water will also remove stains. Fill a large bucket with 1 gallon of hot water 1 qt.

Of chlorine bleach and a quarter cup of. So black stains on roofs can be removed just choose a quality roof cleaner product or your local roof cleaning professional and make your roof look better. Bleach may kill the top layer of algae and lighten the stains but it doesn t kill the underlying algae. Oxygen bleach lightens stains as well and is less harmful to the environment but it doesn t produce as immediate or dramatic an effect as chlorine bleach.

Sodium hydroxide lye products on the other hand work better than bleach and are less harmful to vegetation. Allow the bleach to remain on for 15 to 20 minutes then rinse it off with a hose. A spray stain remover solution a scrub brush a garden house protective eyewear rubber gloves shoes with tread a bucket and a ladder. Wet down the roof with water from the garden hose.

So the algae colony gets right back to work. Algae can be killed and the stains removed using chemical cleaners though they usually return over time. How to remove black stains from roof shingles. Finally there are lots of special products made just for removing algae from asphalt shingles that work really well.

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. Here are a few.