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Building Calculators
Roof Sheeting Calculator
Enter the building footprint, roof type and pitch — get sheet count and cut lengths for IBR or corrugated, plus purlins, screws, ridging and flashing.
Your measurements
36 × 4.5 m
Sheets
104 m²
Roof area
540
Screws
Your materials list
| IBR sheets, 4.5 m — Z275 galv or Chromadek | 36 | Each |
| Purlins 50×76 lipped channel (or gum poles) | 120 | m |
| Roof screws + bonded washers | 540 | Each |
| Ridge capping 0.5 mm | 7 | Length |
| Barge/facia flashing | 18 | m |
Includes 150 mm eaves overhang. Trusses/rafters per your structural design.
Sheets are cut to length — confirm final slope length before ordering.
Need items beyond this list? Browse the full Supply Register.