Advanced Algae Protection
Help protect your roof investment with powerful algae resistance
25 & 30-year limited warranties against blue-green algae discoloration available on qualifying GAF products1
Educational sample available for professionals
Get a sample to help illustrate how GAF Time-Release Algae-Fighting Technology works and the products that are eligible for a 25-year StainGuard Plus™ or 30-year StainGuard Plus™ Pro Algae Protection Limited Warranties.1
1 25 year StainGuard PlusTM Limited Warranty against blue green algae discoloration is available only on products sold in packages bearing the StainGuard PlusTM logo. 30 year StainGuard Plus PROTM Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus PROTM logo. See GAF Shingle and Accessory Limited Warranty for complete coverage and restrictions.
What is blue-green algae?
The dark stains you see on a roof are often caused by tiny cyanobacteria called Gloeocapsa magma — a bacteria commonly known as blue-green algae. It can leave some nasty stains. GAF Time-Release Algae-Fighting Technology helps prevent these stains to protect a homes curb appeal.
What causes roof algae to grow?
Blue-green algae is a bacteria that travels on the wind and thrives in moist environments — so if one house in a neighborhood has it, others have probably been exposed as well.
Get the tech no one else has with GAF Time-Release Algae-Fighting Technology
Proprietary to GAF, our Time-Release Algae-Fighting Technology is engineered with thousands of copper microsites that release algae-fighting copper efficiently, over time, for long-lasting algae-fighting power.
Get protection you can see on our best-selling shingles - Timberline HDZ® and Timberline® UHDZ™
1 25 year StainGuard PlusTM Limited Warranty against blue green algae discoloration is available only on products sold in packages bearing the StainGuard PlusTM logo. 30 year StainGuard Plus PROTM Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus PROTM logo. See GAF Shingle and Accessory Limited Warranty for complete coverage and restrictions.
Add algae protection from eave to ridge
Customers can now get the benefits of GAF Time-Release Algae-Fighting Technology and the strong algae protection limited warranties on qualifying shingles, ridge caps, and even visible starter strips.
Additional GAF products with Time-Release Algae-Fighting Technology and a 25-year StainGuard Plus™ Algae Protection Limited Warranty2:
Add a finishing touch that helps defend against leaks at the hips and ridges, now with a 25-Year StainGuard Plus Algae Protection Limited Warranty*.
TimberTex®
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TimberCrest®
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Ridglass®
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Seal-A-Ridge®
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Z® Ridge
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Seal-A-Ridge® AS
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GAF Timberline® Lifetime Architectural Roofing Shingles - North America’s #1 Selling Shingle, now with a 25-Year StainGuard Plus Algae Protection Limited Warranty*.
Timberline® AS II
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Timberline® CS
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A wide array of designer styles and colors, to match your home, taste, and budget, now with a 25-Year StainGuard Plus Algae Protection Limited Warranty*.
Grand Canyon® Shingles
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Grand Sequoia® Shingles
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Grand Sequoia® AS Shingles
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Camelot® II Shingles
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Slateline® Shingles
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Woodland® Shingles
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Help guard against shingle blow-offs, now with a 25-Year StainGuard Plus Algae Protection Limited Warranty*.
StarterMatch®
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225-year StainGuard Plus™ Algae Protection Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus™ logo. See GAF Shingle & Accessory Limited Warranty for complete coverage and restrictions.
Pros, complete the playlist to learn about GAF Time-Release Algae-Fighting Technology and how it helps protect a homes curb appeal