Profiled roof sheets with supplied laps.
Measure slope length and width for each independent rectangular plane.
Read the right quantitative data
Sheet dimensions on a consistent coverage basis and already specified side and end laps.
Check this ordering assumption
Horizontal run understates slope length and nominal sheet area ignores shared laps.
Roof pitch, structural design, fixing schedules and permitted laps remain supplied.
A worked quantity method
This illustrative set of supplied inputs demonstrates Roof Sheet Side and End Lap Order Calculator. Replace the example measurements and product figures with your own before ordering.
| Supplied input | Metric display | US display |
|---|---|---|
| Sheet width | 1 m | 3.28 ft |
| Sheet length along slope | 2 m | 6.56 ft |
| Specified side lap | 100 mm | 3.94 in |
| Specified end lap | 200 mm | 7.87 in |
| Your additional whole spare sheets | 1 | 1 |
| Independent rectangular roof plane 1: Measured width across sheets | 2.8 m | 9.19 ft |
| Independent rectangular roof plane 1: Measured slope length | 3.8 m | 12.47 ft |
| Independent rectangular roof plane 1: Identical components | 1 | 1 |
Whole roof sheets: 7 sheets
- Sheets across independent planes
- 6
- Additional supplied spares
- 1
Full sheets, fixed orientation and no offcut reuse between planes. Enter slope length, not horizontal run. Effective rib coverage and permitted laps must be supplied.
Open this example in the full calculatorYour measurement and product-data sheet
Record what you know and mark verified items ready. Notes save on this browser after you edit them. Download a copy before clearing browser data.
Measure slope length and width for each independent rectangular plane.
Sheet dimensions on a consistent coverage basis and already specified side and end laps.
Horizontal run understates slope length and nominal sheet area ignores shared laps.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Input for Roof Sheet Side and End Lap Order Calculator. Record the value with its unit and quantity basis.
Choose your next calculation
Roof Sheet Side and End Lap Order Calculator
Count whole rectangular roof sheets on supplied measured planes with specified side and end laps. No pitch, fixing pattern, roof structure or weather performance is selected.
Roof Plane Area Calculator
Sum the geometric area of specified roof planes from horizontal run, rise and ridge length.
Ridge Cap Effective Cover Calculator
Count cap pieces across supplied ridge runs using the effective exposed length after specified overlap.
Turn the estimate into an order
- Confirm that all quantities use the same measured basis and the selected product's current data.
- Keep different products, finishes and handed variants in separate purchase lines.
- Review exact demand and whole-pack purchase quantities before entering your quoted prices.
- Record compatible stock already on hand, then save the remaining order in your browser project.
Measurement and purchase guides
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Reviewed 6 October 2026. Geometry and purchase arithmetic use your measurements and selected specifications. Calculation scope.