GAF Roofing shingles

Timberline HDZ

GAF roof Shingles
master elite certified shingle roofer
Alte roofing logo
GAF roof warranty for material and labor


In the realm of residential roofing, the selection of materials is a pivotal decision that significantly impacts the aesthetics, longevity, and overall value of a home. Among the multitude of options available, GAF asphalt shingles emerge as a superior product, especially when installed by a distinguished and experienced roofing company such as Alte Exteriors, which has proudly served homeowners for over 50 years. Alte Exteriors proudly holds the distinction of being a GAF Certified Master Elite Installer, a testament to their unwavering dedication to excellence and their commitment to upholding the highest standards of craftsmanship. This certification signifies that Alte Exteriors has undergone specialized training to install GAF roofing systems, ensuring that homeowners receive the highest level of proficiency and expertise.

Roof moss and algae?

Learn how roof size is calculated.


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timberline hdz roofing shingle
GAF roof shingle protections
gaf stainguard plus

StainGuard Plus Algae Protection Limited Warranty1

Protect your roof investment with algae resistance so powerful it allows us to offer a 25-year limited warranty against blue-green algae discoloration on many of our most popular products, including Timberline HDZ® Shingles.1

gaf layerlock technology shingle

Layerlock Technology

Get up to a 99.9% nailing accuracy with StrikeZone, a nailing area so easy to hit that a roofer placed 999 out of 1,000 nails correctly in our test.3 Layerlock technology mechanically fuses the common bond between overlapping shingle layers.

gaf layerlock technology shingle
gaf infinite wind speed protection shingle

WindProven™ Limited Wind Warranty2

When installed with the required combination of GAF Accessories, Timberline HDZ® Shingles are eligible for a 15-year limited wind warranty with no maximum wind speed limitation.

timberline hdz roof shingles


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1 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.
2 15-year WindProven Limited Wind Warranty on Timberline® Shingles with LayerLock Technology 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
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. 3 Results based on study conducted by Home Innovation Research Labs, an independent research lab, comparing installation of Timberline HD® Shingles to Timberline HDZ® Shingles on a 16-square roof deck using standard 4-nail nailing pattern under controlled laboratory conditions. Actual results may vary.