Plan it once. Buy it right.

Your deck, down to
the last board.

Compare 90 mm and 140 mm Kwila layouts using full stock lengths— with a clear plan, purchase list and price before you head to the timber yard.

0 sizing cuts2 profiles compared5 lengths selected
Your comparison

Two ways to build it.

Live plan
Pricing sourceListed prices from Bunnings NZ

Prices last checked 3 Oct 2026

Pricing is an estimate only. Supplier prices and available random lengths vary by store and can change without notice. Confirm current pricing and stock with your selected store before purchasing.

Layout optionsFinished outside size
Recommended layout

90 × 19 mm Kwila

5 mm board gap

Finished size4,200 × 5,220 mmBoard gap5 mm
4,200 mm5,220 mmboard direction
1800 mm2100 mm2400 mmrequested outline
!

Support every join. Butt joins shown in the layout must land on a joist or approved blocking. This plan does not design the supporting frame.

Purchase list

What to pick up

37 boards1800 mm66.6 lm
36 boards2100 mm75.6 lm
37 boards2400 mm88.8 lm
Calculated minimum boards 110Total length 231 lmButt joins 55

This is a calculated minimum. It assumes your supplier can provide the exact lengths listed. Random-length orders may contain a different mix, so consider spare material for defects or cutting mistakes.

Decking estimate
$1,794.87NZD

231 lm × $7.77/lm

Finished area21.9 m²Decking per m²$81.87

Decking boards only. Excludes framing, fixings, delivery, finishing products and labour.

Happy with this plan?Save the layout, shopping list and cutting guide for offline use.

How the plan works

Simple inputs.
Practical answers.

  1. 1
    Fit the outside size

    We apply your fit priority to both dimensions, combining selected stock lengths and tuning whole board rows with practical gaps.

  2. 2
    Tune the width

    We compare practical gaps and whole board rows for both the 90 mm and 140 mm profiles.

  3. 3
    Price the plan

    Every full board is counted by length and priced using the current planning rate you provided.