Construction Products, Windows, Doors & Fenestration worked example

Roofing Material Yield at 99% target roofing material yield: a worked example

This scenario runs the roofing material yield calculation on the strong side: 99% target roofing material yield, with every other input held at its documented default. measuring roofing product material efficiency before quoting or production review

The inputs for this scenario

  • Usable roofing product installed: 18,600 sq ft (unchanged)
  • Roofing material issued to job: 20,300 sq ft (unchanged)
  • Target roofing material yield: 99 % (raised for this scenario; the documented default is 93)

Working through the calculation

  • Applying the documented formula (Roofing material yield = usable roofing product area or count ÷ issued roofing material area or count × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 91.63 % for roofing material yield, the number this scenario is built around.
  • At this operating point the engine returns 7.37 points for roofing material yield gap to target.
  • At this operating point the engine returns 18,600 count for usable roofing product area or count.
  • At this operating point the engine returns 20,300 count for issued roofing material area or count.

How this compares with the baseline

  • Against the tool's baseline example, where target roofing material yield sits at 93% and the headline result is 91.63 %, this scenario lands almost exactly on the baseline at 91.63 %.
  • Use it after a job or production run closes to reconcile issued material against usable output and to flag waste outliers. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • roofing material yield: 91.63 % (headline result)
  • roofing material yield gap to target: 7.37 points
  • usable roofing product area or count: 18,600 count
  • issued roofing material area or count: 20,300 count

Run it with your numbers

  • Every input above is editable in the live Roofing Material Yield calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.