Mix a solution of chlorine bleach and water at a mixing rate of 7 parts water to 1 part chlorine bleach.
How do i get rid of mold on roof shingles.
They will let the mixture stay on the roof for a bit to ensure it penetrates the stain.
These stains will discolor your roof and damage the shingles over a period of time if left alone.
If they are severely molded you may want to give it a little longer.
Ladders or portable scaffolding.
Hose and fresh water.
They re likely to damage the shingles just be sure to wet your foundation plantings first and rinse everything in clean water when you re done.
Start from the top shingle and rinse downward to prevent water seepage.
Safety first a proper ladder will be required.
Mold stains can form on roof shingles that are in permanent shade.
Chlorine bleach or copper sulfate crystals.
The roofing contractors mix this bleaching agent with water and spray the roof down paying close attention to areas that are stained.
Make sure there is someone on the ground in the case of an emergency.
Remove large pieces of mold or moss by hand.
No pressure washers please.
Allow the solution to soak into the shingles for at least 15 minutes.
Next rinse the shingles thoroughly with a garden hose at low pressure.
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.
One way to determine if it s mildew is to put a few drops of chlorine bleach on to the black mark.