GAF Timberline HDZ Hickory Algae Resistant Laminated High Definition Shingles (33.33 sq. ft. per Bundle)

Hickory with algae-resistant merchandising targets buyers who want the same warm color story but worry about blue-green algae staining in tree-lined neighborhoods and humid microclimates.

This listing is still Timberline HDZ, so the engineering and code-oriented references trace to the same HDZ specification pathway as non-AR Hickory SKUs, while algae performance claims remain tied to eligible packaging and warranty text.

Manufacturer documentation for the HDZ line includes UL Class A fire classification and UL 2218 Class 3 impact resistance for the product family, plus ASTM references commonly cited in steep-slope asphalt roofing submittals.

Estimator workflows benefit from consistency: if your crew is already optimized for HDZ bundle weights, lay patterns, and accessory bundles, switching colors within the same line is administratively simpler than mixing unrelated laminate platforms.

The durable roof is still built in the details: penetrations, step flashing, wall transitions, and valley water-shedding logic are where most moisture failures begin, regardless of shingle brand marketing.

WindProven is frequently discussed in sales conversations, but eligibility is program-specific; if you promise outcomes verbally, match those promises to GAF’s written accessory and installation requirements.

Photograph bundle labels on delivery. On multi-phase jobs, lot consistency reduces the risk of granule tone drift that shows up only in afternoon light.