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

Algae-resistant labeling is a purchasing signal in humid, shaded, and coastal-adjacent markets where homeowners fear streaking as much as they fear leaks.

This SKU is explicitly positioned as algae-resistant Weathered Wood within Timberline HDZ; the underlying laminate platform and line-level documentation pathway remain HDZ, not a separate chemistry family.

For technical accuracy, keep fire and impact language tied to the Timberline HDZ specification sheet: the line is documented with UL Class A fire classification and UL 2218 Class 3 impact resistance at the family level, alongside the ASTM citations printed on manufacturer literature.

Coverage planning should still start from the bundle: listings commonly cite about 33.33 square feet per bundle, but the authoritative value is what is printed for the delivered SKU, especially when comparing channels or packaging revisions.

Installation quality remains the decisive variable. Nail placement, exposure consistency, and clean detailing at penetrations matter more than incremental marketing adjectives once the roof is in service.

StainGuard Plus is described for eligible packages; warranty interpretation belongs to the current GAF warranty booklet and the bundle markings on site.

If you are staging a mixed-material elevation, document color selection early: roof granule appearance shifts with lighting and adjacent materials, and consistent bundle lots reduce the risk of visible plane-to-plane variation across large slopes.