Then use a long handled brush to scour the surface of the shingles and loosen stuck on mold while it s dry and brittle.
How to clean mold off of roof shingles.
Clean your roof regularly.
Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.
It should be picked up swept off or blown off regularly to avoid facilitating the growth.
Do it yourself and save big bucks.
Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty.
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.
Mold stains can form on roof shingles that are in permanent shade.
So it pays to clean your shingles as soon as you spot algae growth.
Moss those green feathery clumps you may see forming on the roof is a different type of plant and isn t the same thing as algae or mold.
Mold or mildew makes black ugly streaks on a roof.
Algae is a single celled organism while moss is not.
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.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
A mixture of trisodium phosphate tsp bleach and water will also remove stains.
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.
The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.
Prevention makes stain cleaning much easier later on.
These stains will discolor your roof and damage the shingles over a period of time if left alone.
Mold won t form on a roof because it s allergic to sunlight and as soon as the ambient temperature surrounding the mold becomes dry the mold dies.
How to clean mold off a roof.