CertainTeed Corp., Valley Forge, Pa., offers the algae-resistant Hatteras® shingle accessory available in all Hatteras shingle colors, with a full 8-inch exposure. The Grand Manor Shangle® accessory matches all the Grand Manor colors and also has an 8-inch exposure. It offers two full layers and has a 12-inch width that allows applications over standard ridge vents. The Presidential™ accessory, used for hip and ridge capping, is available in coordinated colors to match Presidential TL and Presidential Shake. The Starter Course shingle is designed specifically for use with Grand Manor and Hatteras and is the only approved alternative to using the Grand Manor or Hatteras shingles themselves.