Ironbark Timber Flooring

Grey Ironbark solid timber flooring: the hardest and heaviest floor we sell, 130 × 14 mm Feature grade in stock at Thomastown, with 83 × 14 and 130 × 19 mm and the Select and Standard grades ordered in. Seasoned hardness 16 kN (WoodSolutions), about 1,106 kg/m³, light grey to chocolate with red-brown boards.

• Sizes: 83 × 14, 130 × 14 and 130 × 19 mm tongue and groove, end-matched, priced per m²; 14 mm is an overlay board for a continuous subfloor or slab, 19 mm goes over joists
• Grades: Feature (stocked; gum veins and the full colour range), Standard and Select (cleaner, ordered in)
• Timber: grey ironbark, mainly Eucalyptus paniculata, from NSW and Queensland; heartwood termite resistant; sapwood not susceptible to lyctid borer
• Look: light grey to light chocolate with darker red and brown boards; tight interlocked grain with little figure
• Hardness in use: 16 kN, roughly double Merbau; heavy and hard on blades, so allow extra time to cut
• Laying and finishing: supplied at 10–12.5% moisture content; sand and coat about two weeks after laying (WoodSolutions). We stock the adhesives, vapour barrier and skirting
• At Greenhill: stocked at 170 Settlement Road, Thomastown, with pickup or delivery across Melbourne and regional Victoria. See all solid timber flooring, or grey ironbark decking for outside.

Grey Ironbark flooring: sizes, grades and prices

Prices are per square metre on our website on 14 October 2026. The 130 × 14 mm Feature board is stocked; Select, Standard and the other sizes are ordered in, so call for current pricing.

Which thickness: 14 mm overlay or 19 mm structural

The 19 mm board is a structural floor: it spans joists or battens on its own, or goes over a plywood or particleboard subfloor. The 14 mm board is an overlay: it must be glued or nailed to a continuous subfloor, or direct-stuck to a concrete slab over a moisture barrier, and cannot span joists. Both are tongue-and-groove and end-matched, and both are sanded and coated after laying, so the finished floor looks the same; the 14 mm board is cheaper per square metre and sits lower at doorways.

What Grey Ironbark flooring is like

Grey ironbark, mainly Eucalyptus paniculata, is the hardest and heaviest floor we sell: WoodSolutions gives a seasoned hardness of 16 kN at about 1,106 kg/m³, roughly double Merbau and well above Spotted Gum. The boards run light grey to light chocolate with darker red and brown pieces, a tight interlocked grain, and very little figure, so the floor reads as dense and even rather than lively.

It is the floor for shops, halls and houses with dogs, dragged furniture and hard use. The heartwood is naturally termite resistant and the sapwood is not susceptible to lyctid borer. The trade-off is in the laying: it is heavy, blunts blades, and needs sharp tooling to cut cleanly.

Grades for this timber

Feature grade, the one we stock, shows the full colour range with gum veins and some knots; Standard and Select are progressively cleaner and are ordered in. In ironbark even Feature grade looks even, because the grain is so tight. Grade names vary between suppliers, so ask what each one allows; our timber grades guide explains the system.

Laying and finishing

Boards are supplied kiln-dried at 10–12.5% moisture content. If that matches the house, lay them; if the house is noticeably wetter or drier, open the packs and stack them with airflow for a week first. Leave 10–12 mm expansion gaps at walls and fixed points, more across a wide room. Leave the laid floor about two weeks before sanding and coating so it settles (WoodSolutions). Allow 5–10% extra for cuts and the odd board you set aside. We stock the adhesives, vapour barrier and trims and the skirtings to finish the job.

The same timber for other jobs

• Grey ironbark decking – the same timber outside, Class 1 in the ground
• Ironbark cladding
• Solid timber flooring – all species

Questions we get asked

How much does ironbark flooring cost?

On our website on 14 October 2026, the 130 × 14 mm Feature board is $100 per m²; Select 130 × 14 mm is $124 per m² when ordered in.

Is ironbark the hardest flooring timber?

Of the species we stock, yes: 16 kN against 10.1 for Spotted Gum and 8.9 for Blackbutt.

Is it hard to install?

Harder than most. Pre-drill any face fixings, keep blades sharp, and allow more time for cutting. Once down it is as stable as any hardwood.

What colour will the floor be?

A mid grey-brown overall with red-brown boards through it. Clear coats deepen the browns a little.

Pickup and delivery

Stocked at our flooring showroom at 170 Settlement Road, Thomastown, Mon–Fri 7 am–4:30 pm and Sat 9 am–1 pm, with delivery across Melbourne and regional Victoria quoted with the order. Bring your room sizes in and we will work out the packs, or call (03) 9465 9875.

Pick up from 170 Settlement Road, Thomastown. Stocked lines are usually ready the same day. Delivery across Melbourne and regional Victoria is quoted on the order; call (03) 9465 9875 for a price on your suburb.

All prices include GST. Flooring is priced per square metre, decking and dressed timber per lineal metre, framing and posts per length. Trade accounts get trade pricing on the site and at the counter: apply here.

Bring your room or deck sizes in, or call (03) 9465 9875, and we will work out boards, lengths, fixings and oil, with about 10% allowed for cuts.