Timber Species: Brushbox – (Lophostemon confertus)
Description of Species:
A native Australian evergreen, brushbox is also commonly cultivated in other regions such as the United States. Often referred to as vinegartree, box scrub, pink box, Brisbane box, or Queensland box, brushbox can be found all over eastern Australia as a city tree but grows naturally in coastal Queensland and in the northeastern reaches of New South Wales.
Capable of reaching heights of 40 meters and higher in the wild, Brushbox is highly resistant to pests (especially termites), disease, drought, and provides dense foliage that shades as well or better than eucalyptus trees. Part of why it’s a popular tree in locations such as Perth, Melbourne, and Sydney, Brushbox is also highly tolerant of pruning to keep it out of the way of power lines, unbothered by smog and pollution, and tends to not drop branches on the heads of passersby nearly as often as other city trees like eucalyptus.
As a building material, Brushbox’s fine, even texture and its rich colours ranging from anywhere between reddish brown and pale, greyish pink makes it perennially popular. Its lack of gum veins makes it a fantastic choice for flooring, as its grain is naturally unblemished and makes for excellent solid timber or engineered floors. However, be aware that sapwood is much paler than heartwood, providing for some interesting variations in hue.
Brushbox is ultra-durable thanks to its average 9.5 Janka hardness rating and its dry density of 900 kg/m³. Its natural termite resistance is also an excellent bonus when it comes to using it as a construction material. As with every type of wood product, natural variations and imperfections in Brushbox are always a possibility; these variations are often thought of giving flooring timber added charm and individuality rather than seen as detractors, though – especially when it comes to interesting grain or coloration patterns.
Dry Density: 900 kg/m³
Janka Hardness: 9.5 kN
These properties are only a guide, as timber is a natural product there will be variations within any species. The Janka Dry Hardness rating measures the hardness of the wood. The higher the number the harder the wood.
Technical Properties of Brushbox
Janka (Hardness) Rating – Dry
Critical Radiant Flux
Smoke Development Rate
Naturally bushfire-resisting Timber
>2.2 and <4.5
Tangential Shrinkage %
Naturally Termite Resistant to AS3660
R = Resistant
NR = Non resistant
Naturally Lyctus Susceptible
S = Susceptible
NS = Non susceptible