No pressure washers please.
How to get black mold off roof.
To get rid of mold and other types of growth for good it s best to use a powerful.
Then spray the cleaner onto the shingles photo 1.
Remove any excess shingle overhangs clean clogged gutters and repair roof leaks causing excessive moisture damage.
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.
If there are vines or tree branches touching the roof eaves cut them back to allow adequate sunlight.
Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside.
That ll prevent the cleaner from drying out too quickly.
How to clean mold off a roof.
Spray the entire roof thoroughly.
Scrub away the thickest buildup.
Your stains are probably caused by the airborne spores of a blue green algae known as gloeocapsa magma which is often mistaken for mold or mildew.
Spray wash the roof with a 50 mix of water and bleach to get rid of the algae.
Not to worry though because you can clean the mold off with basic household bleach and save your roof long before you need an expensive replacement.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
Cut back vines or tree branches that contribute to the moisture underneath the eaves.
Spray all the plants growing near your house with water and this will help protect them from any damage caused by the chlorine bleach.
To remove the algae from asphalt shingles you have a few options.
Use a long handled brush to scour the surface of the shingles and loosen stuck on.
Preventative action is best when it comes to permanently stopping black mold growth.
Before applying the cleaner spray the roof with water to cool it down.
They re likely to damage the shingles.
No pressure washers please.
Use a cleaner specially made for killing algae or by spraying a mixture of one part bleach to four parts water with tsp trisodium phosphate or.
Black mold reappears even if treated with a biocide or fungicide once the area gets wet again.
Spraying the roof 1.
Mold stains can form on roof shingles that are in permanent shade.
Mix 1 part bleach to 3 parts water and apply to the mildew covered area with a hand pump sprayer.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
You could use regular household bleach to remove the algae from your roof.
These stains will discolor your roof and damage the shingles over a period of time if left alone.