

The m² Trap
Requests usually arrive as "price per square metre" — but m² is fourth in the list of cost drivers, behind detail counts, access, and phasing.
| 1. Diagnosis quality | Treating the wrong detail re-bleeds in 12 months; the cheapest quote is often the re-do. Detection (process) is the main cost lever. |
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| 2. Detail count | Laps, bolts, skylights, stack throats, gutter joints per m² decide works intensity — not the area number. |
| 3. Access & safety | Height, cradle access, catchment needs, hygiene containment each carry cost (e.g. campus phasing). |
| 4. Phasing constraint | Bays too small = slow; waste waiting = priced in. Live-site discipline defines rate (method). |
| 5. System selection | EPDM details vs hot membrane scopes price differently — see the comparison guide. |
What The Quote Should Hold
A professional scope document prices: detail schedule, system spec, phasing plan, documentation standard, warranty terms (framework). Anything less is an estimate that will move. Our approach is described on the quote page.