This discoloring can hurt the beauty of your home s curb appeal and the resale value of your home if you have it up for sale.
How to clean roof shingles mildew.
Mold stains can form on roof shingles that are in permanent shade.
While an occasional cleaning might not harm your roof repeated use of harsh chemicals or the erosive effects of pressure washing can damage or shorten the life of asphalt shingles.
Do it yourself and save big bucks.
If it s dirt the dark stain will remain but if it s mildew the stain will go away.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
Stained shingles take away from the overall neat appearance of the exterior of the home.
How to clean roof shingles.
Jan 12 2019 how to clean algae or mold off your roof shingles.
Proper cleaning is an important step in roof maintenance.
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.
Roof shingles become dirty over time.
One way to determine if it s mildew is to put a few drops of chlorine bleach on to the black mark.
To clean mold off a roof start by putting on rubber gloves a breathing mask and goggles to protect yourself from the harsh cleaning chemicals.
You can successfully clean shingles by using oxygen bleach.
So it pays to clean your shingles as soon as you spot algae growth.
Then use a long handled brush to scour the surface of the shingles and loosen stuck on mold while it s dry and brittle.
Some of this growth including the stains from algae spores.
While an occasional cleaning might not harm your roof repeated use of harsh chemicals or the erosive effects of pressure washing can damage or shorten the life of asphalt shingles.
Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty.
One day you may notice that your roof is turning black or fungus is spreading across of it.
These stains will discolor your roof and damage the shingles over a period of time if left alone.
A few years ago commercial roof cleaning products containing hydrogen peroxide lye were commonly recommended to remove mildew.
They are exposed to wind rain and other weather elements that not only cause dirt to form on the shingles but also mold and mildew.