GAF Introduces Roofing Shingle Warranty With No Wind Limit

On January 10, GAF officially announced the nationwide launch of Timberline HDZ shingles featuring LayerLock technology, which mechanically fuses the common bond in to offer a larger nailing area. The company also announced that roofing contractors can now also offer homeowners a GAF WindProven limited wind warranty, the first wind warranty for roofing shingles with no maximum wind speed limit, when installing GAF shingles with LayerLock technology and four qualifying GAF accessories.

“Roofing contractors have been asking for new ways to help accelerate and grow their business, and we’re excited to introduce technology that can make their jobs faster and easier with Timberline HDZ shingles,” said Jim Schnepper, president of GAF. “This represents some of the most exciting innovation in the roofing industry today, backed by the quality and reliability homeowners have trusted for more than 130 years with GAF.” 

According to the company, LayerLock technology mechanically fuses the common bond to offer a new StrikeZone nailing area is up to 600 percent larger than that of Timberline HD shingles, resulting in increased nailing accuracy and faster installation versus Timberline HD. Timberline HDZ offersdual-phase shingle-to-shingle seal with Dura Grip sealant and an asphalt-to-asphalt monolithic bond for durability, strength and powerful wind uplift performance. The product is also fully compatible with Timberline HD roofing shingles.

According to David Ellis, Vice President of Residential at GAF, third-party time and motion studies comparing HD and HDZ installation show that HDZ installs 30 percent faster with up to 99.9 percent nailing accuracy. “The takeaways here are accuracy and productivity,” Ellis noted. “Those are the two things that contractors care about the most. With the WindProven warranty, it speaks to the homeowner about the things they care most about: strength, durability and wind performance. You put those things together and you have a great product that contractors and homeowners are going to love.”

According to Ellis, the product has been installed since March in a pilot market in the Southeast, and feedback has been overwhelmingly positive. “HDZ and LayerLock are engineered for performance, and we have done it in a very elegant way,” Ellis said. “It makes sense to the contractors. They get it, and they now have a different value proposition in the home with LayerLock and the WindProven warranty that others can’t offer.”

GAF Timberline HDZ shingles will be on display for a national audience for the first time at the 2020 International Roofing Expo from February 4-6 in Dallas, Texas. For more information, visit

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