We used a roof cleaning service called roof shampoo.
How to remove mold and mildrew from steep roof.
Start from the top shingle and rinse downward to prevent water seepage.
In many cases the mildew will spray right off.
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.
Spray away mildew starting at the top of an exterior wall and work your way downward.
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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.
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.
The products are all eco friendly and don t contain bleach so we didn t have to worry about killing our flowers or bushes.
If some remain apply the cleanser again wait 10 more minutes and repeat the rinse process.
It was like getting a new roof.
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.
How to use bleach mixtures on your roof.
Using a plastic pump type garden sprayer thoroughly soak the affected area with your choice of chemical.
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.
Next rinse the shingles thoroughly with a garden hose at low pressure.
Bleach mixtures can injure sensitive plants.
For maximum coverage use a pump sprayer to disperse the solution.
That way whenever it rains some of the metal molecules will wash down the roof and kill any algae trying to regain a foothold on your shingles.
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.
Closely inspect nearby vents roof flashing decks window wells and anywhere wood is rotting.
If you run into stubborn mildew accumulations though use the.