Grey Ironbark: Timber of Strength & Durability

The Grey Ironbark belongs to a distinguishable group of trees and so aptly named bacuse of its wide, compact and hardy bark. Its resultant timber lives up to its name for it fittingly is an ironwood typical of the Eucalyptus family. The wood like iron is very hefty. Its hard and compact body makes it so difficult to manage and manipulate. You can hardly bore nails or plane it without breaking a lot of sweat. If you place a pioec of it under a microscope, you would easily see that its fibers look so solid and pressed together tightly. It also appears to be well fortified with thick walls.



The Grey Ironbark is known by its two distinct species. The Eucalyptus paniculata is by far the most popular commercial species and can be found distributed from the southernmost part of the New south Wales coast all the way up north of Coffs Harbor. This species is commonly known as the Grey and Red Ironbarks. The other species, the Eucalyptus siderophloia grows on the southern coast of New South Wales to Queensland particularly in Maryborough.



The Grey Ironbark has a heartwood wearing a color anywhere from light grey or at times a light chocolate. It could have a darker red or brown on some occasions. Its sapwood has a paler shade. In truth, Grey Ironbarks have several variations depending on the area where it grows. In Port Macquarie, there are Black Ironbarks of the same paler hue but with black streaks, which could be thin or broad running through the wood. Its texture is coarse but even at the same time.



The timber is hard to manipulate and manage because of its high density, which limits its use in applications where detailing is required. The heartwood is durable and can last for 40 years or more if installed above ground with only 25 years or more life expectancy in-ground. The timber itself has many outdoor uses like used for heavy engineering, structural purposes, boat building, flooring and decking. It was so hardy that it was the popular choice of the early settlers in Port Jackson in building their homes, bridges, piles and other heavy construction needs.



It is known to be termite resistant and its sapwood not susceptible to lyctid borer infestation. The sapwood is easily treated with preservative impregnation unlike its heartwood, which uses presently available commercial methods. The wood can be seasoned sufficiently by utilizing traditional air and oven seasoning processes. It works well with regular fittings and fastening. Nonetheless, because of its high density, machining and surface preparations ought to be done before using adhesives. The wood easily allows paint, stain or finish making the Grey Ironbark a beautiful sparkling timber floorings.