Roofing Mold/Mildew

Submitted By
jmbowles
Answers
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Q:

I saw a product in my local hardware store called 'Wet and Forget', that claimed to remove the mold/stain on shingled roofs. Is this product effective in doing that? The stain has been on the roof for a few years. Can you suggest an effective way to remove the mold/mildew stains/ Thanks