Advanced Algae Protection
Help protect your roof investment with powerful algae resistance.
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25 & 30-year limited warranties against blue-green algae discoloration available on qualifying GAF products¹
GAF Advanced Algae Protection Limited Warranties - StainGuard Plus and StainGuard Plus PRO
Protect your customers' new roofs from eave to ridge with algae resistant shingles from GAF. Our GAF shingles, hip and ridge caps, and starter strips come with the 25-Year StainGuard Plus™ Algae Protection Limited Warranty. Or offer your customers the NEW 30-Year StainGuard Plus PRO™ Algae Protection Limited Warranty with new Timberline® UHDZ™ shingles with 10% MORE Time-Release Algae-Fighting technology.
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 Plus™ Limited Warranty against blue green algae discoloration is available only on products sold in packages bearing the StainGuard Plus™ logo. 30 year StainGuard Plus PRO™ Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus PRO™ 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.
Explore all residential warranties
Backed by North America’s largest manufacturer of roofing products, GAF warranties and guarantees are among the strongest in the roofing industry. See our easy-to-follow guide to warranties available for GAF residential roofing products to help find the right one for you.
Get protection you can see on our best-selling shingles - Timberline HDZ® and Timberline® UHDZ™
Timberline HDZ® shingles
Find out why Timberline HDZ® Shingles are the #1-selling shingles in North America — and include a 25-year StainGuard Plus™ Limited Warranty against blue-green algae discoloration.¹
Timberline® UHDZ™ shingles
Timberline® UHDZ™ shingles feature the patent-pending Dual Shadow Line, for sunset shadows all day long — and are the only GAF shingle that comes with a 30-year StainGuard Plus™ PRO Limited Warranty against blue-green algae discoloration.¹
¹ 25 year StainGuard Plus™ Limited Warranty against blue green algae discoloration is available only on products sold in packages bearing the StainGuard Plus™ logo. 30 year StainGuard Plus PRO™ Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus PRO™ logo. See GAF Shingle and Accessory Limited Warranty for complete coverage and restrictions.
Add algae protection from eave to ridge
See warrantiesExplore products with StainGuard Plus™
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*.
GAF Timberline® Lifetime Architectural Roofing Shingles - North America’s #1 Selling Shingle, now with a 25-Year StainGuard Plus™ Algae Protection Limited Warranty*.
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*.
Help guard against shingle blow-offs, now with a 25-Year StainGuard Plus™ Algae Protection Limited Warranty*.
² 25-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.