How To Clean Mildew Off Roof Shingles

Inspect the roof for any remaining fungus.

How to clean mildew off roof shingles.

How to clean 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. If it is slimy or any sort of residue comes off on your hand repeat the above steps. Mold stains can form on roof shingles that are in permanent shade.

Proper cleaning is an important step in roof maintenance. A few years ago commercial roof cleaning products containing hydrogen peroxide lye were commonly recommended to remove mildew. Allow the roof to dry thoroughly. Some of this growth including the stains from algae spores.

That ll kill it off but won t inhibit regrowth so just rewet the roof with the bleach solution whenever cleaning off the rest of the place. If it s dirt the dark stain will remain but if it s mildew the stain will go away. One way to determine if it s mildew is to put a few drops of chlorine bleach on to the black mark. These stains will discolor your roof and damage the shingles over a period of time if left alone.

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 could replace all the roofing with new shingles dark enough to disguise the staining or with shingles laced with copper granules which are lethal to algae. A mixture of trisodium phosphate tsp bleach and water will also remove stains. So it pays to clean your shingles as soon as you spot algae growth.

Cleaning due to evidence of permanent asphalt shingle damage caused by high pressure powerwashing. Now if you live where cleaning off mildew from exterior surfaces is a constant chore the just hit the moss with the same bleach solution. 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. Then use a long handled brush to scour the surface of the shingles and loosen stuck on mold while it s dry and brittle.

Do it yourself and save big bucks. But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores. Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty. The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae.