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GAF HDZ™ Shingles Engineered for Accuracy Installed at the Cape Ann Project House

This Old House’s Cape Ann Project requires more than 6,000 square feet of roofing. Watch as we demonstrate how GAF’s Timberline® HDZ™ roofing shingles provide LayerLock™ technology and a wider strike zone, allowing shingles to be installed 30% faster and more accurately than standard shingles.