Remove Mildew From Roof Shingles

Each shingle on the roof is rinsed.

Remove mildew from roof shingles.

City water is generally 80 100 psi. The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae. Mold stains can form on roof shingles that are in permanent shade. It is not uncommon for roof shingles to turn black over time.

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. If it s dirt the dark stain will remain but if it s mildew the stain will go away. Remove black stains from roof shingles to preserve the appearance of your home s roof. When that happens it is generally caused by mildew algae mold or dirt stains.

These stains will discolor your roof and damage the shingles over a period of time if left alone. Apply a storebought or diy cleaning solution to remove the moss. One way to determine if it s mildew is to put a few drops of chlorine bleach on to the black mark. Once the wash kills the algae it needs to be well rinsed to remove it from your roof.

These black streaks are unsightly and can diminish the appearance of the entire exterior of the home. The high powered water jets can damage shingles and remove the shingle granules that protect the roof. The pressure on the shingle is less than 100 psi. Living in a humid area of the country like florida you ve probably seen your asphalt shingle roofs with unsightly dark streaks on them.