Metriova提供金融、商业、健康和建筑的免费在线计算器。计算贷款、投资、健康指标和工程材料用量。
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.