Construction Products, Windows, Doors & Fenestration worked example

Roofing Roll Throughput at 97% roofing line uptime: a worked example

What does the result look like when roofing line uptime reaches 97%? The full calculation is worked below with real intermediate numbers. checking roofing product capacity against orders or line commitments

The inputs for this scenario

  • Roofing output per roll cycle: 480 sq ft / cycle (unchanged)
  • Planned roofing roll cycles: 18 cycles (unchanged)
  • Roofing line uptime: 97 % (raised for this scenario; the documented default is 84)
  • Roofing first-pass yield: 94 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross roofing output capacity = roofing output per roll cycle × planned roofing roll cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 7,878 sq ft for good roofing output capacity, the number this scenario is built around.
  • At this operating point the engine returns 8,640 sq ft for gross roofing output capacity.
  • At this operating point the engine returns 259 sq ft for roofing output lost to downtime.
  • At this operating point the engine returns 503 sq ft for roofing output lost to defects.

How this compares with the baseline

  • Against the tool's baseline example, where roofing line uptime sits at 84% and the headline result is 6,822 sq ft, this scenario comes in 15.48% above the baseline at 7,878 sq ft.
  • A figure at this level is achievable when roofing line uptime is genuinely sustained, not just peaked for a shift. It assumes uptime and yield are independent and stable; a single jam or coating defect cluster can break that assumption, so validate the percentages against recent shift data.

Results at a glance

  • good roofing output capacity: 7,878 sq ft (headline result)
  • gross roofing output capacity: 8,640 sq ft
  • roofing output lost to downtime: 259 sq ft
  • roofing output lost to defects: 503 sq ft

Run it with your numbers

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

Last reviewed 2026-05-12.