Kwila vs Vitex

Hardwood-to-hardwood comparison

Colour at delivery is not the final colour

Both species vary naturally between boards. A fresh Kwila deck can contain red-brown and darker streaks; Vitex tends toward a lighter yellow-brown field. UV and weather move both toward grey if they are not maintained with a compatible pigmented finish. A clear oil may slow moisture uptake but cannot permanently freeze the first-day colour.

Ask to see a representative pack or a sufficiently large sample, not one hand-picked board. Agree whether colour variation, gum pockets, machining marks and short lengths are acceptable before dispatch. If a uniform coated colour is essential, trial the complete cleaning and coating system on the actual batch.

Kwila runoff deserves its own site plan

BRANZ identifies brown extractive bleeding as a Kwila characteristic. Before installation, identify pale concrete, rendered walls, pools and drainage paths below or beside the deck. Follow the timber supplier’s cleaning or weathering guidance and protect adjacent finishes. Do not assume one coat of oil removes the risk immediately.

Vitex is not a ‘no-maintenance’ alternative. Supplier guides still address dry storage, board acclimatisation, gaps, predrilling, fixings and ongoing cleaning. The difference is not that one needs care and the other does not; it is the type of appearance and installation issues that dominate.

Fixing and length mix can outweigh a small rate difference

Both hardwoods are commonly face-fixed with stainless screws or installed with a documented proprietary system. The board and fixing suppliers should confirm screw grade, gauge, pilot hole, countersink, edge distance and corrosion exposure. Dense timber plus an undersized pilot hole can snap screws; an oversized countersink can hold water.

Random lengths also drive yield. A 90 mm board has the same geometric coverage whichever species is chosen, but a poor length mix can increase butt joints and offcuts. Request the length distribution, pack quantity, delivery method and return policy with the quote.

When each option earns its place

• Choose Kwila when the dark red-brown appearance is intentional, its higher recorded price fits the budget, responsible sourcing can be verified and tannin runoff can be managed.
• Choose Vitex when a lighter hardwood palette is preferred and the supplier can provide a clear specification, useful length mix and project quote.
• Pause the decision if the quote says only ‘hardwood decking’. Species, profile, dimensions and documentation belong on the order.
• For coastal work, obtain project-specific fixing and exposure advice; hardwood durability does not protect an unsuitable screw.

Timber Dealers records Kwila 90 × 19 at $7.77/LM and 140 × 19 at $12.86/LM as market references checked 13 August 2026. Vitex is quote-required. That makes this a specification-and-quote comparison, not a claim that one current market price is lower.

Approve a sample as a range, not a colour chip

Lay several dry boards outdoors in daylight, wet one section and apply the proposed finish to another. This reveals colour range, grain, machining and how the finish changes contrast. Record that natural variation remains expected; a single approved board should not become an impossible colour warranty for the entire pack.

• View both faces and edges if the profile can be installed either way.
• Check end splits and whether trimming changes useful length.
• Confirm whether supplied boards are pre-oiled or require cleaning before coating.
• Protect adjacent pale finishes during any extractive-bleed trial.
• Agree the return/selection policy before opening every pack.

For Vitex, obtain the current product installation guide from the actual supplier. For Kwila, add a runoff-management note to the site plan. Both species still require a documented fixing and gap system.