![GAF certified contractor nailing shingles on roof in the widest nail zone avaialbe](/-/media/images/mastheads/masthead/masthead-image/gaf/resources/hdr-layerlock-update-2_1080x360.jpg?width=1080)
Get the widest nail zone available
Provides up to 99.9% nailing accuracy
The GAF StrikeZone® nailing area is so easy to hit that a roofer placed 999 out of 1,000 nails correctly in our test.1
Timberline HDZ® shingles with LayerLock® technology
LayerLock® Technology mechanically fuses the common bond between overlapping shingle layers. The added strength at the common bond powers the StrikeZone® nailing area - the industries widest nail zone.![Home with Timberline HDZ roof shingles, with Layerlock technology](/-/media/images/content/cta-row-with-image/row-image/gaf/panel_layerlock-timberline-shingles.jpg?as=0&width=764&hash=2E6DC4AC3FB0C0C412BFE2D86A9A1FFF)
Layerlock® technology is featured on GAF’s #1 selling shingle - Timberline HDZ®
Shingles featuring LayerLock® technology
![Timberline® HDZ ™](/-/media/images/content/card-with-link/card-image/gaf/resources/carousel_timberlinehdz-1.jpg?as=0&width=510&hash=6E443F364C0776579DDD4C5FF4136D07)
Timberline HDZ®
![Gray Timberline UHDZ shingle swatch](/-/media/images/content/card-with-link/card-image/gaf/resources/carousel_timberlineuhdz.jpg?as=0&width=510&hash=061B7C184DCABF8E9B488F510743BB61)
Timberline UHDZ®
![Black Timberline AS II roof shingle swatch](/-/media/images/content/card-with-link/card-image/gaf/resources/carousel_timberlineasii-1.jpg?as=0&width=510&hash=19E1D151D710654FDE3E779A3E83B5AB)
Timerbline® AS II
Learn how to install Timberline HDZ® Shingles
![Man holding GAF roofing shingle with roofing nail accuracy from widest nail zone](/-/media/images/videos/thumbnails/ycawoapt1l0.jpg?as=0&width=800&hash=77FD30135FA9C669C91656BA838E8CAF)
Roof installation overview
Engineered to protect
![Video showing labor saving of GAF shingles](/-/media/images/videos/thumbnails/obrzwdrqera.jpg?as=0&width=800&hash=97B0FCD9886E04D2FEDDF92C6B1C02B3)
Save time and labor with up to 30% faster nail fastening¹
More ways GAF helps protect your roof
![GAF StainGuard Plus Algae Protection diamond](/-/media/images/content/card-with-link/card-image/gaf/resources/content-tile_stainguard.jpg?as=0&width=510&hash=AD0307C81A5AC650B32A99A6ED293699)
Long-lasting algae fighting power
![GAF Windproven waranty diamond](/-/media/images/content/card-with-link/card-image/gaf/resources/content-tile_windproven.jpg?as=0&width=510&hash=C9088BCFB7F14A950F810EF00DAE8E2F)
Wind Coverage
![GAF Dura Grip Advanced Sealant diamond](/-/media/images/content/card-with-link/card-image/gaf/resources/content-tile_duragrip.jpg?as=0&width=510&hash=D6EF8CB33EE44264CC1AF3365D44475B)
Dura Grip™ Advanced Sealant
225-year StainGuard Plus™ and 30-year StainGuard Plus PRO™ Algae Protection Limited Warranties (as indicated) against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus™ or StainGuard Plus PRO™ logos. See GAF Shingle & Accessory Limited Warranty for complete coverage, restrictions, and qualifying products.
315-year WindProven™ limited wind warranty covers GAF Shingles with LayerLock® Technology only and requires the use of GAF Starter Strips, Roof Deck Protection, Ridge Cap Shingles, and Leak Barrier or Attic Ventilation. See GAF Roofing System Limited Warranty for complete coverage and restrictions. Visit gaf.com/LRS for qualifying GAF products. For installations not eligible for the WindProven limited wind warranty, see GAF Shingle & Accessory Limited Warranty for complete coverage and restrictions.