A Timberline® UHDZ™ roofing system goes beyond just shingles. It's a premium system that combines protection, beauty, and durability, while working together to provide shelter and assurance. In fact, when installed with the required GAF Accessories on one roof, Timberline® UHDZ™ Shingles qualify for the GAF WindProven™ limited wind warranty with NO maximum wind speed limitation.* It is also the only GAF shingle to offer Dual Shadow Line for beautiful sunset shadows all day long.Timberline® UHDZ™ Shingles also feature 10% more GAF Time-Release Algae-Fighting Technology than even our best-selling Timberline® HDZ™ shingles, for protection so strong it allows GAF to offer a 30-year StainGuard Plus PRO™ Algae Protection Limited Warranty against blue-green algae discoloration. A GAF Roofing System with Timberline® UHDZ™ Shingles truly goes BEYOND any roofing system on the market. See GAF Roofing System Limited Warranty for complete coverage and restrictions. Visit gaf.com/LRS for qualifying GAF products.