Construction Products, Windows, Doors & Fenestration worked example

Roofing Roll Throughput at 60% roofing line uptime: a worked example

This worked example runs the roofing roll throughput numbers for a tougher week than the baseline: 60% roofing line uptime instead of the typical 84%. Estimate good roofing roll or membrane output from output per cycle, planned cycles, uptime, and yield.

The inputs for this scenario

  • Roofing output per roll cycle: 480 sq ft / cycle (held at the documented default)
  • Planned roofing roll cycles: 18 cycles (held at the documented default)
  • Roofing line uptime: 60 % (the input this scenario stresses; the baseline uses 84)
  • Roofing first-pass yield: 94 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross roofing output capacity = roofing output per roll cycle × planned roofing roll cycles.
  • good roofing output capacity works out to 4,873 sq ft at these inputs, and this is the headline figure for the scenario.
  • gross roofing output capacity works out to 8,640 sq ft at these inputs.
  • roofing output lost to downtime works out to 3,456 sq ft at these inputs.
  • roofing output lost to defects works out to 311 sq ft at these inputs.

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 28.57% below the baseline at 4,873 sq ft.
  • Use it during production planning, capacity commitments, and OEE-style loss analysis on a roofing coating, laminating, or roll-forming line. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • good roofing output capacity: 4,873 sq ft (headline result)
  • gross roofing output capacity: 8,640 sq ft
  • roofing output lost to downtime: 3,456 sq ft
  • roofing output lost to defects: 311 sq ft

Run it with your numbers

  • To rerun this with your own numbers, open the live Roofing Roll Throughput calculator, set roofing line uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.