It will kill the sh and dry before it s clean.
Roof cleaning recipe with copper sulfate.
Sweep the mildew off the roof using a push broom.
Scrape or rinse as much moss and other debris off of the roof as possible using a broom pressure washer or other tool taking care not to.
Step 2 prepare a mixture of copper sulfate and water using a ratio of 12 ounces dry measure of copper sulfate to 1 gallon of warm water.
Used a mixture of regular bleach 25 dish soap one big squirt and water with a handful of copper sulfate granules.
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Roof cleaned with oxygen bleach left and chlorine bleach center.
Then prepare a mixture of copper sulfate and water using a ratio of 12 ounces dry measure of copper sulfate to 1 gallon of warm water.
Don t touch the sh with bare hands.
Check gutters and downspouts especially if they are metal for accumulated debris such as.
Clean your roof when it super hot out in the baking sun.
Mixed it up in a pump sprayer and let it soak for 5 minutes on the roof.
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This can be done by having it swept and blown once or twice a year when dry to remove leaves twigs and any dirt particles.
Wear gloves and eye protection.
Don t walk on a moss covered.
Spray all the plants growing near your house with water as this will help protect them from any damage caused by the copper sulfate solution.
Lastly rinse the roof with a hose.
Tried a variation of this on my asphalt roof.
Apply the solution to the mold infested area and wait for the mildew to turn brown.
Don t spray your roof down first with water to cool it off.
Once that s done then wet the roof with the copper sulfate solution or a stout sodium if you need to use a ladder to clean off the roof or apply the copper sulfate spray work on the ladder cautiously and use a spotter.
What is down side to copper sulfate.
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Dirt or particles on roofs can create places for moss to start growing so the primary preventative each year is to clean your roof.
Tim allan commented 2018 02 14 14 42 25 0800.