7 Questions Homeowners Ask About Algae-Resistant Shingles
1. What Does Scotchgard™ Protector Do To Help My Roof?
Atlas Algae-Resistant Shingles featuring Scotchgard Protector
provide one of the most effective solutions to stop the ugly staining and streaking caused by roof algae. The protection is built directly into the shingle so the color you choose for your roof is the color that stays. Homeowners benefit from long-lasting curb appeal without worrying about black streaks or algae stains developing over time.
2. What Makes Atlas Algae-Resistant Shingles Work?
Scotchgard Protector in Atlas roofing shingles is not a spray or chemical coating. Instead, it is a consistent blend of copper-coated granules combined with a proprietary 3M porous ceramic coating that slowly releases copper ions over time. These ions prevent algae growth before it ever starts on your roof.
Copper granules must be distributed across the entire surface of the shingle, including the hip and ridge, in a minimum 10% blend. To maintain the Scotchgard Protector brand standard, Atlas sends shingles from every production shift to an independent third-party testing facility for verification. The algae protection is built directly into the shingle installed on your roof — nothing else to apply and no future cleaning required.
3. Are Atlas Algae-Resistant Shingles Different From Other Brands?
Yes — the difference can be significant. Many shingles labeled as algae resistant only provide short-term protection. Some manufacturers use minimal copper just to delay algae staining for a few years. After that period, streaking often appears.
Atlas shingles with Scotchgard Protector offer lifetime protection against algae streaks and stains. They are manufactured with a consistent 3M-approved formula designed to fight algae growth throughout the life of the roof. If a product does not carry the Scotchgard Protector brand, homeowners cannot be certain what algae-fighting technology is actually inside the shingle.
4. What Is Roof Algae?
The most common algae found on roofs is called Gloeocapsa Magma, often referred to as “blue-green” or “black” algae. These organisms produce a dark pigmented layer that protects them from ultraviolet rays. By the time homeowners see black streaks on their roof, the algae may have been growing for months or even years.
Atlas Algae-Resistant Shingles featuring Scotchgard Protector are designed to protect against all types of roof algae, not just the most common varieties.
5. How Does Algae Grow On A Roof?
Algae typically forms in areas where moisture collects and remains for extended periods. It often appears first on the north-facing slopes of a roof where shade and humidity allow it to thrive. Algae also feeds on mineral fillers found in asphalt shingles, such as calcium carbonate, which can retain moisture and encourage growth.
Because algae spores travel through the air, entire neighborhoods can experience roof streaking problems at the same time.
6. Do Algae-Resistant Shingles Cost More?
Atlas Algae-Resistant Shingles featuring Scotchgard Protector are competitively priced compared to other leading shingle brands. Investing in a roofing system with built-in algae protection helps preserve the appearance of your home while preventing costly roof cleaning services later.
For homeowners who value curb appeal and long-term durability, algae-resistant roofing shingles are often the smarter investment.
7. Which Atlas Shingles Feature Scotchgard Protector?
Several Atlas roofing products include Scotchgard Protector technology, including:
- Pinnacle® featuring Scotchgard Protector
- StormMaster® Shake
- StormMaster® Slate
Courtesy of Atlas Roofing Corporation
If you have any questions about Scotchgard Algae-Resistant Shingles or would like to schedule a free in-home consultation, give Thrush & Son a call today at 937.833.5136. One of our professional representatives will gladly assist you.
When it comes to protecting your home and making improvements that last, always take the time to choose the right shingle roofing system.
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