Common Australian Timber Species
Beautiful Local timber for your interest
(Eucalyptus delegatensis / Eucalyptus regnans / Eucalyptus obliqua)
The name Tasmanian Oak is used to describe three species of Eucalypt commonly found in Tasmania. Together they produce a blend of beautiful colouring from pale cream to pink and reddish-brown.
Considerations of timber property
Natural Shrinkage and Expansion
Tongue and groove timber used in flooring is a natural material, which is seasoned and machined to the correct profile for installation.
Natural timber is hygrospic; it continually takes up and gives off moisture to keep in balance with its environment. This results in natural expansion and shrinkage over time.
Depending on the timber species- shrinkage and/or expansion may take a day, week, or several months.
The weather, moisture, and other local effects can affect the gaps between the timber floors; where depending on the finish- can show cracks, splits visually.
In order to reduce the degree of timber movement, timber today are generally seasoned or kiln dried to an average moisture content of around 10 – 15 %. This is considered to be a good standard for a majority of installations. But of course, during its usage lifespan, due to the environment, this level can change.
You may also want to consider the hardness of timber if you expect exceptionally high traffic. Worth consideration for retail, shopping, recreational purposes. (Gyms, cafes, Entryway, corridors)
The Janka hardness test measures the force required to embed a .444 inch steel ball to half its diameter in the select timber. It is one of the best measures of timber hardness and durability to pressure.
The higher the Janka rating, the more hard the timber is- for example Northern red oak has a hardness of 1290 compared to Brazilian cherry which is rated at 2350 nearly twice as hard.
A recommended hardness for relatively heavy traffic would be to use timber with a rating over 1000. However, timbers such as snakewood has a rating around 4000 which is too hard to use property, nor does it feel nice underfoot.
Rose River Gum
*A general summary on timber species.