CertainTeed SwiftStart® metric starter shingle is designed specifically for use with CertainTeed Landmark Series shingles. Rather than cutting expensive field shingles to use as starters, you can save time and money by starting with SwiftStart. Reduced installation time, so jobs are finished faster Required for use to obtain enhanced warranties Code-compliant, meets min. 2" headlap requirement for metric shingles--many competing products do not Each 18-piece bundle covers 116 linear ft. Works with all metric shingles that are similar to Landmark CertaSeal™ modified-asphalt sealant holds strong against wind uplift and shingle blow-off