Composite Decking Calculator
Estimate materials for Modwood, EvaLast or Trex composite decking. This is a guide only — for an exact quantity and fixing plan, contact our team.
Advanced options (gap & joist spacing)
Estimated materials
| Deck area | — |
| Lineal metres of decking (incl. waste) | — |
| Approx. boards required | — |
| Approx. fixings required (clips/screws) | — |
Estimates assume boards run the full deck length, standard joist spacing, and roughly two fixing points per board per joist. Modwood and EvaLast typically use hidden clip fixing systems, while some Trex profiles are face-fixed — actual fixing counts depend on the system you choose, so confirm with our team before ordering. Actual requirements also vary with layout and cuts.