However at the time of this writing they do list a number of companies that.
Getting mold off of roof shingle.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
Replace or install slip resistant pads on the feet and steps of the ladder before getting to work.
Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty.
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 algae black mold and moss begin to die off on contact.
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.
Check the ladder feet for defects cracks or corrosion.
Roof moss removal is naturally slippery work.
They call it the algaeblock system.
Green stains clean up in 1 2 weeks black stains and moss clean up within a few months.
Next rinse the shingles thoroughly with a garden hose at low pressure.
Do it yourself and save big bucks.
Wet the surface and forget it there s no rinsing or scrubbing.
Installing zinc strips under a row of shingles near the ridge of the roof will prevent mildew from forming.
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.
3m is not a manufacturer of asphalt shingles just the granules.
To get rid of mold and other types of growth for good it s best to use a powerful chemical agent like chlorine bleach.
Start from the top shingle and rinse downward to prevent water seepage.
You can find more information on these special roofing shingles here.
Step 3 applying asphalt roofing shingles containing a copper additive in their surface granules is an option.
So it pays to clean your shingles as soon as you spot algae growth.
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.
The combination of the wind and the rain breakdown the growth and rinse your surfaces clean over time.