High-Performance Starter are starter course shingles designed specifically for use with Grand Manor, Highland Slate and Hatteras shingles - and are the only approved installation alternative to using the shingles themselves. The Integrity Roof System is designed to provide optimum performance - no matter how bad the weather conditions are. High Performance Starter meets the accessory requirements for the CertainTeed Integrity Roof System, which is comprised of underlayments, shingles, accessory products and ventilation all working together.