How GAF StainGuard™ Plus Technology Prevents Roof Algae

Blue-green algae growth is one of the most common roofing issues homeowners face. These microorganisms create unsightly stains on the roof, which can drag down your home’s curb appeal. Luckily, an innovative product is available that effectively prevents these dark stains from forming: GAF StainGuard™ Plus.

Here’s how GAF StainGuard Plus prevents blue-green algae growth.

Blue-Green Algae on Roofs

Blue-green algae are more common in humid areas of the country. They typically grow on the shaded part of the roof, where sunlight is less harsh and moisture is more abundant. Algae cells form a dark pigment that protects them from the sun. 

Asphalt shingles have limestone that makes them strong, durable and reflective. Algae consume the limestone, which can make the asphalt shingles weak. The more stains your roof has, the less reflective it becomes. Blue-green algae can combine with fungus to form lichen. After that, moss can begin to grow on your roof and build a layer of soil where grass can grow. Once that happens, you’ll need to contact a roofing company for a new roof.

How GAF StainGuard Prevents Algae Growth

Shingles with StainGuard Plus Time-Release technology feature specially engineered capsules infused throughout with thousands of copper microsites. Copper is ready to be activated to fight against blue-green algae stains. 

StainGuard Plus capsules release 10 times as much algae-killing copper as traditional copper-coated mineral granules. Every day, the new capsules gradually and steadily release copper to prevent stains from forming on the roof. StainGuard Plus on Timberline Ultra HD® shingles come with a 25-year limited warranty against blue-green algae. 

At Winfield Builders, we work with top manufacturers in the industry to provide you superior roofing and siding services. Call us at (301) 850-6560 or fill out our online form to request a free quote. We serve homeowners in Annapolis and Columbia, MD. 

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