Remove Mildew From Roof Shingles

These black streaks are unsightly and can diminish the appearance of the entire exterior of the home.

Remove mildew from roof shingles.

Once the wash kills the algae it needs to be well rinsed to remove it from your roof. Apply a storebought or diy cleaning solution to remove the moss. Mold stains can form on roof shingles that are in permanent shade. A blue green algae known as gloeocapsa magma could be the reason you have the algae which is spread by airborne spores sometimes it can also be caused by an accumulation of mildew mold dirt or defective shingles.

One way to determine if it s mildew is to put a few drops of chlorine bleach on to the black mark. City water is generally 80 100 psi. Each shingle on the roof is rinsed. The high powered water jets can damage shingles and remove the shingle granules that protect the roof.

If it s dirt the dark stain will remain but if it s mildew the stain will go away. Living in a humid area of the country like florida you ve probably seen your asphalt shingle roofs with unsightly dark streaks on them. Remove black stains from roof shingles to preserve the appearance of your home s roof. It is not uncommon for roof shingles to turn black over time.

When that happens it is generally caused by mildew algae mold or dirt stains. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae. The broom allows me to cover 24 at a time at the full flow rate of whichever pressure washer i m using. A few years ago commercial roof cleaning products containing hydrogen peroxide lye were commonly recommended to remove mildew.