There are a lot of homeowners with shingled roofs shortening the lifespan of their roof by not cleaning it. Research shows that the bacteria within the mold and algae on your roof actually feeds off the limestone and other materials within the shingles on your roof.
By not cleaning your shingle roof, you allow that bacteria to grow and grow, continuing to eat away at your roof and shortening the lifespan dramatically.
Home insurance companies have caught wind of this and are dropping homeowners from coverage who have dirty roofs.
Check out this video:
The bottom line? Cleaning your roof will make your roof last longer. A roof cleaning is a great investment as premature roof repairs and roof replacements are extremely costly.