Cleaning the mold from your roof when you first see it is extremely important, or having on of our roofing professionals take it off is the best option. Think safety first, is type of algae is slippery on concrete after it’s been washed off, so that should give you a clear understanding of what it’s like on a roof; and requires proper cleaning and safety tools. However, the sooner you handle your issue with the mold, the better. As this bacteria/fungus pervasive and persistent, simply put… the more developed the mold becomes on your roof, the more it becomes a difficulty to tame. And if not removed or managed; moist and soft areas of the roof are often chewed on, then that provides homes for birds and rodents such as mice, rats, squirrels and other critters that climb up gutters or jump from neighboring trees to reach the roof, causing hazardous and expensive damage. Letting mold linger may become irreparable, and if left to feed on rotting wood can create an unstable roof that requires replacement, you want to your roof clean or have it cleaned as this helps to increase its longevity.