The NAILING ZONE of OC Duration Series Shingles! Duration® Series Shingles outperform leading competitors with wide, single-layer nailing zones in 3 key tests: – Delamination Resistance – Nail Pull-Through Resistance – Nail Blow-Through Resistance Don’t be swayed by the hype–the proof is in the performance. And our testing proves it. Watch this video to see how Owens Corning® Duration® Series Shingles perform up to 2 times better in the Delamination resistance test which measures the shingle’s ability to resist layer separation. Duration® Series Shingles outperform the competition where it matters the most–the nailing zone.