Advanced Algae Protection
25 & 30-year limited warranties against blue-green algae discoloration available on qualifying GAF products¹
Educational sample available for professionals
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?
What causes roof algae to grow?
Get the tech no one else has with GAF Time-Release Algae-Fighting Technology
Get protection you can see on our best-selling shingles - Timberline HDZ® and Timberline® UHDZ™
Timberline HDZ® shingles
Timberline® UHDZ™ shingles
Add algae protection from eave to ridge
See warrantiesExplore products with StainGuard Plus™
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®
See productTimberCrest®
See productRidglass®
See productSeal-A-Ridge®
See productZ® Ridge
See productSeal-A-Ridge® AS
See productGAF 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
See productTimberline HDZ® RS
See productA 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
See productGrand Sequoia® Shingles
See productGrand Sequoia® AS Shingles
See productCamelot® II Shingles
See productSlateline® Shingles
See productWoodland® Shingles
See productHelp guard against shingle blow-offs, now with a 25-Year StainGuard Plus™ Algae Protection Limited Warranty*.