Metriovaは金融、ビジネス、健康、建築の無料オンライン計算機を提供しています。ローン、投資、健康指標、プロジェクト材料を計算できます。
Roofing is measured in "squares" — one square equals 100 sq ft of roof area. Most asphalt shingle bundles cover 33.3 sq ft, so 3 bundles make one square. Always account for roof pitch: a 6/12 pitch increases surface area by ~12% compared to flat measurement. Add 10-15% extra for waste and valleys.