Timberline HDZ and UHDZ
Timberline HDZ and Timberline UHDZ — what LayerLock actually does on your roof, how the two algae warranties differ, and what the WindProven language really requires.
Shingles manufactured by GAF. Installed by Yosemite Roofing.
Homeowners comparing dimensional shingles and coordinated roof-system options.
Built with LayerLock and the StrikeZone nailing area, which widens the target our crew has to hit. GAF publishes a 25-year StainGuard Plus algae limited warranty for HDZ. Where a Class 3 impact claim applies, it applies only to packages bearing that classification.
Official product pageHomeowners who want more visual depth and longer algae coverage.
Uses GAF's UltraMat construction and a Dual Shadow Line for richer dimension, with a 30-year StainGuard Plus PRO algae limited warranty. Class 4 impact applies only to appropriately marked UltraMat packages — not to the product name in general.
Official product pageRatings and warranty terms are tied to specific packaging and specific installation conditions. We verify what the bundles actually being delivered to your job are marked with, rather than quoting a rating from a website.
These are GAF's own product photographs, used with permission and credited to their owner. They are manufacturer examples — not photos of Yosemite Roofing projects.
Colors and product availability vary by region, production run and time of year. Screens also shift color. Always compare a current physical sample on your roof, in daylight, before ordering.
Leak barrier
Concentrated protection in the valleys and at penetrations, where most leaks actually start.
Roof deck protection
The underlayment layer over your decking, beneath the shingles.
Starter strip
Sets the seal at eaves and rakes. Qualifying accessories are a condition of GAF's enhanced wind warranty language.
Ridge cap and ventilation
Finishes the ridge and lets the attic exhaust heat — critical in an East Texas summer.
GAF's warranty tiers depend on which of these components are used together and on how the roof is installed. We'll list on the quote exactly which GAF components are included.
We won't claim a certification, tier or eligibility we haven't verified for your specific project. Ask us to show you the paperwork.
LayerLock joins the shingle layers together, and StrikeZone provides a wider nailing area to help installers place fasteners as directed by GAF's published application instructions.
Two honest reasons to upgrade: you want the deeper Dual Shadow Line look, or you want the longer 30-year StainGuard Plus PRO algae coverage. If neither applies to your home, HDZ installed correctly with proper ventilation is a very strong roof.
No. It's warranty language with conditions attached — qualifying accessories and specified installation. East Texas straight-line winds and hail can damage any roof. Review the coverage, exclusions and required components before choosing your roof.
Dark roof streaks are often associated with algae; an inspection can help identify the cause. Both HDZ and UHDZ carry algae limited warranties, with UHDZ's running longer. Coverage terms and remedies are GAF's, and they're spelled out in GAF's residential warranty documents.
Class 4 applies to appropriately marked UltraMat packages, so it depends on what's actually available and marked when we order. If Class 4 is your priority, say so and we'll confirm what we can actually source for your job before you sign.
We'll bring current samples to your home in Tyler or anywhere in East Texas, look at them against your brick in daylight, and walk your roof before recommending anything. No pressure and no cost.
Shingles manufactured by GAF. Installed by Yosemite Roofing.
