Your Roof Is Aging Faster Than It Should
That dark streaking across your roof shingles is not dirt. It is not pollution either. It is a living organism called Gloeocapsa magma, a type of airborne algae that feeds directly on the limestone filler inside your asphalt shingles. And it is eating your roof alive, slowly and quietly.
The algae weakens the protective granules on your shingles, making them far more vulnerable to UV rays and weather damage. Every season you ignore it, you are shortening the life of your roof.
Untreated algae can cut your roof's lifespan by 5 to 10 years and push your cooling costs up by 10 to 15 percent because the dark surface absorbs significantly more heat.
The fix is not complicated. Algae-resistant shingles, zinc strips, and routine maintenance help keep stains from coming back. Pressure washing, though, is not the answer. It strips granules and speeds up the very damage you are trying to stop.
Catch it early. Clean it right. Your roof will thank you with another decade of solid life.












