GAF Timberline HDZ Barkwood Algae Resistant Architectural Roof Shingles ( 33.33-sq ft per Bundle ) Item #1064501 | Model #103959 and system start-up must be

and system start-up must be done by a certified technician

Up to 30% greater flow compared to standard products

Each piece is 9/16-in thick x 4-1/4-in wide x 8-ft long

raised flower beds

GAF Timberline HDZ Barkwood Algae Resistant Architectural Roof Shingles ( 33.33-sq ft per Bundle ) Item #1064501 | Model #103959 and system start-up must beWe took our signature #1 selling shingle, Timberline HDZ, and transformed it by strengthening the common bond and creating the largest nailing zone. Timberline HDZ Shingles have the same renowned Timberline quality and performance you know and love, with improved nailing accuracy and installation efficiency! Timberline HDZ Shingles are easy and fast to install, with an incredible 99. 9% nail placement accuracy! A great value, architecturally stylish,