Estimate material costs accurately. Calculate total roof area, "squares", and shingle bundles needed based on dimensions and pitch.
In the roofing industry, a "Square" is a standard unit of measure. One square equals 100 square feet of roof area.
Materials like shingles, underlayment, and flashing are often sold by the square or by the bundle, where:
A roof's pitch determines how much material you need. A steeper roof has more surface area than a flat roof covering the same ground footprint.
For a simple gable roof, 5% is often enough. For roofs with hips and valleys, 10-15% is recommended to account for cutting and trimming.
No, this calculates field shingles. You will generally need one extra bundle for every 60 linear feet of eaves for starter strips.
