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
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.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.