How it Works

Copper stops algae. When the precise level of copper-fortified granules in the Scotchgard™ Algae Resistant Roofing System are uniformly distributed across the surface of quality asphalt shingles in precise combination with standard colored granules, you’re assured of built-in long-term algae and stain resistance.

See How Algae Can Destroy The Beauty Of Your Roof

Select the color sample closest to yours and view the algae progression from 5 to 15 years on a roof that does not have the Scotchgard™ Algae Resistant Roofing System.