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During the rainy season, moss is revived on roofs as it soaks up and stores excess rainwater. The stored water can seep under to the shingles and then through the roof underlayment and sheathing, leading to growths of mold and costly repairs from rot. This video shows 3 key tips for preventing and treating moss on your roof, without using chemicals that are highly toxic to fish and other aquatic life. Get more pesticide-free solutions at www.pesticide.org
This video was created with support from Mountain Rose Herbs and the East Multnomah Soil and Water Conservation District.