Using a pressure washer set to a low psi ensures that dirt and other debris are also rinsed away.
How to get rid of mold on tile roof.
If they are severely molded you may want to give it a little longer.
One way to clean the roof of algae and moss is with a brush and a little grunt work scrubbing and separating the greens from the roof.
Applying a chemical treatment can help you get rid of this unsightly problem.
To get rid of mold and other types of growth for good it s best to use a powerful chemical agent like chlorine bleach.
Mix 1 part bleach to 3 parts water and apply to the mildew covered area with a hand pump sprayer.
For maximum coverage use a pump sprayer to disperse the solution.
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.
Next rinse the shingles thoroughly with a garden hose at low pressure.
Allow the solution to soak into the shingles for at least 15 minutes.
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.
You can whip up your own basic cleaner by combining one quart of bleach one gallon of water and cup 60ml of trisodium phosphate tsp.
No pressure washers please.
Mold algae lichen and other organic growths are common issues with tile roofs causing them to look stained.
Spray all the plants growing near your house with water and this will help protect them from any damage caused by the chlorine bleach.