QUICK ANSWER
How much roofing for a 2,000 square foot house?
For a simple 2,000 sq ft footprint with a 6/12 pitch and 10% waste, a planning estimate is about 24.6 roofing squares, or roughly 74 bundles at 3 bundles per square.
2,000 × 1.118 pitch factor × 1.10 waste ≈ 2,460 sq ft · ÷100 ≈ 24.6 squares
Why roof area exceeds house footprint
Roof slope increases surface area above the flat footprint. Waste allowances account for cuts, laps, starter, ridge, and jobsite loss.
Complex roofs need a field takeoff
Valleys, dormers, hips, multiple roof sections, and unusual geometry can materially change quantities. Use this as a planning estimate only.