So it pays to clean your shingles as soon as you spot algae growth.
Getting mold off of roof shingle.
Green algae black mold and moss begin to die off on contact.
Check the ladder feet for defects cracks or corrosion.
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.
Start from the top shingle and rinse downward to prevent water seepage.
Roof moss removal is naturally slippery work.
Replace or install slip resistant pads on the feet and steps of the ladder before getting to work.
Have gloves with good grip material on the palms and fingertips to help you keep steady while removing clumps of moss from the asphalt shingles.
Next rinse the shingles thoroughly with a garden hose at low pressure.
3m is not a manufacturer of asphalt shingles just the granules.
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.
This unique advance in shingle technology gives long term fungus protection for the entire roof.
The combination of the wind and the rain breakdown the growth and rinse your surfaces clean over time.
Do it yourself and save big bucks.
If some remain apply the cleanser again wait 10 more minutes and repeat the rinse process.
Run your gloved hand over the shingles to check for any slimy mold remaining after you re finished rinsing.
Green stains clean up in 1 2 weeks black stains and moss clean up within a few months.
They call it the algaeblock system.
Step 3 applying asphalt roofing shingles containing a copper additive in their surface granules is an option.
Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty.
However at the time of this writing they do list a number of companies that.
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.
You can find more information on these special roofing shingles here.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
For maximum coverage use a pump sprayer to disperse the solution.
Installing zinc strips under a row of shingles near the ridge of the roof will prevent mildew from forming.