Estimate roof area, squares, and shingle bundles needed.
Enter roof length and width (or footprint). One roofing square = 100 sq ft. Add 10–15% for waste and pitch.
• 1 roofing square = 100 sq ft. • Typical bundle covers ~33 sq ft (3-tab). • Use pitch factor for sloped roofs (e.g. 4/12 ≈ 1.054, 6/12 ≈ 1.118). • Add 10–15% for waste.
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