GAF Materials Corp., Wayne, N.J., announced the addition of Antique Slate Blend to its Slateline® designer shingle line, a fiberglass-asphalt shingle that replicates the look of real slate at a fraction of the cost. The shingles have a patented extra-large 17- by 40-inch size. With a design that includes a double row of specially formulated Dura Grip adhesive, Slateline is warranted to withstand hurricane-force winds up to 110 mph. In addition, the shingles are covered by GAF's Smart Choice Shingle limited warranty. This includes a 40-year transferable warranty against manufacturing defects, Smart Choice Protection (non-prorated material and installation labor coverage) for the first 10 years, plus a 110 mph limited wind warranty, also for the first 10 years. The shingles have Class A fire and wind ratings from UL, the highest ratings possible, and also passes the UL 997 110 mph wind test. Slateline shingles are supplied with Algae Eater™ Protection for defense against blue-green algae.