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. Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside not to worry though because you can clean the mold off with basic household bleach and save. Remove black stains from roof shingles to preserve the appearance of your home s roof. If it s dirt the dark stain will remain but if it s mildew the stain will go away. A few years ago commercial roof cleaning products containing hydrogen peroxide lye were commonly recommended to remove mildew.

It is not uncommon for roof shingles to turn black over time. Apply a storebought or diy cleaning solution to remove the moss. The pressure on the shingle is less than 100 psi. The broom allows me to cover 24 at a time at the full flow rate of whichever pressure washer i m using.

The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae. When that happens it is generally caused by mildew algae mold or dirt stains. 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.

Each shingle on the roof is rinsed. Mold stains can form on roof shingles that are in permanent shade. The high powered water jets can damage shingles and remove the shingle granules that protect the roof. These stains will discolor your roof and damage the shingles over a period of time if left alone.