gaf timberline hd charcoal (shown for color). which prevents shingles from bending over the very perimeter, while diverting water into the gutters the shingles on this job carry a 50 year warranty . after:. the owners can now enjoy and leak-free home with a renewed roof deck and full 50-year warranty. ventilation is another roof component that is unique to each home a well-vented attic can add years from one roof replacement to the next. 3 tab roof shingle. heritage 30-year shingles to gaf timberline hd 50-year shingles for free! our materials vendor was selling both shingles at the same price and we passed .