To get rid of mold and other types of growth for good it s best to use a powerful chemical agent like chlorine bleach.
How to remove mold and mildrew from steep roof.
Spray all the plants growing near your house with water and this will help protect them from any damage caused by the chlorine bleach.
If mold is growing on an exterior wall or ceiling first look for a leak in the wall or roof as a test for mold.
To keep the algae from coming back insert 6 inch wide strips of zinc or copper under the row of shingling closest to the roof peak leaving an inch or two of the lower edge exposed to the weather.
Mix 1 part bleach to 3 parts water and apply to the mildew covered area with a hand pump sprayer.
Run your gloved hand over the shingles to check for any slimy mold remaining after you re finished rinsing.
Because it is difficult to totally protect them from the mix spray them down with clean water before.
For maximum coverage use a pump sprayer to disperse the solution.
If you run into stubborn mildew accumulations though use the.
Measure from the moldy area to a reference point like a door then find the spot on the other side of the wall or ceiling.
We used a roof cleaning service called roof shampoo.
How to use bleach mixtures on your roof.
Bleach mixtures can injure sensitive plants.
The contractor put his hand directly under the water spray to prove the pressure was so low.
Start from the top shingle and rinse downward to prevent water seepage.
It was like getting a new roof.
Using a plastic pump type garden sprayer thoroughly soak the affected area with your choice of chemical.
Closely inspect nearby vents roof flashing decks window wells and anywhere wood is rotting.
And they used a very low pressure rinse.
The products are all eco friendly and don t contain bleach so we didn t have to worry about killing our flowers or bushes.
Next rinse the shingles thoroughly with a garden hose at low pressure.
Spray away mildew starting at the top of an exterior wall and work your way downward.
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.
In many cases the mildew will spray right off.
How to clean mold off a roof.