GAF now offers algae-resistant StainGuard Plus™ Shingles!

Blue-green algae on some roofs is called Gloeocapsa magma and you may have noticed it as dark stains or streaks. Wind and animal activity spread Gloeocapsa magma and the algae thrives on roofs that see less sun and that stay moist making a roof look a lot older than it may actually be.

GAF’s exclusive patent-pending algae-fighting breakthrough with exclusive GAF Time-Release technology can help prevent unsightly algae! StainGuard Plus™ Time-Release technology releases algae-fighting copper over time for long-lasting algae-fighting power. Unlike older copper layered technology, StainGuard Plus™ technology uses engineered capsules* that are infused throughout with thousands of copper microsites so copper is ready to be activated in the fight against blue-green algae stains.

*StainGuard Plus™ Time-Release technology and 25-year ltd. warranty against blue-green algae discoloration available only on Timberline Ultra HD®shingles sold in packages bearing the StainGuard Plus™ logo. Does not apply to Timberline Ultra HD® Reflector Series™ Shingles. See GAF Shingle & Accessory Ltd. Warranty for complete coverage and restrictions.