Waste Factor

The percentage of extra material added to an order to account for cuts, valleys, hips, and mistakes during install.

A simple gable roof might run 10% waste. A complex roof with lots of valleys, dormers, and hip cuts can hit 15-18%. The same logic applies to flooring, siding, drywall, and any sheet-based material.

Running short mid-job costs far more in time, fuel, and customer trust than a few extra bundles.

Related

• Square (Roofing) — A unit of roof measurement equal to 100 square feet — the standard way roofers measure, quote, and order materials.
• Pitch (Roofing) — The slope of a roof, expressed as rise over run — e.g. 6:12 means 6 inches of rise per 12 inches of horizontal run.
• Compare contractor CRMs — FieldKrew against Jobber, Housecall Pro and ServiceTitan
• GFCI (Ground Fault Circuit Interrupter) — An outlet or breaker that shuts off power within milliseconds when it detects a ground fault — required in wet areas by code.