Timber Species - Jarrah

Jarrah (Eucalyptus marinata)

Jarrah is one of the few commercial species from Western Australia. Jarrah is renowned world-wide for its density, resistance to insect attack and beautiful rich red colour which deepens over time into a soft burgundy. Jarrah’s beautiful colouring and exceptional hardness are a perfect combination for commercial and residential flooring.


Physical Properties

Dry Density: 820 kg/m³

Janka Dry Hardness: 8.5 kN

The Janka rating is the hardness level given to each species. The higher the number, the greater the hardness.

The natural colour variation within a timber species is normal and one of its most appealing attributes. The species samples shown here are indicative only and do not necessarily show the colour variation that can be naturally found in each species. It is recommended that large samples of the species be viewed in a timber flooring showroom when deciding on the species for a new timber floor.


Properties

Species Name
Botanical Name
Colour Range

Jarrah
Eucalyptus marginata
Red

Janka (Hardness) Rating - Dry

8.5

Natural Durability Class
In-ground contact
Outside above ground contact


2
2

Density (kg/m3)
Unseasoned (Green)
Seasoned (Dry)


1170
820

Strength Group
Unseasoned (Green)
Seasoned (Dry)


S4
SD4

Joint Group
Unseasoned (Green)
Seasoned (Dry)


J2
JD2

Fire Indices
Spread-of-Flame Index
Smoke-Developed Index
Critical Radiant Flux
Smoke Development Rate
Group Number
Naturally bushfire-resisting Timber


3
3
>2.2 and <4.5
<750
3
unknown

Tangential Shrinkage %

7.4

Toughness (Nm)
Naturally Unseasoned
(Green)
Seasoned (Dried)



13
10

Naturally Termite Resistant
to AS3660
R = Resistant
NR = Non resistant

R

Naturally Lyctus Susceptible
S = Susceptible
NS = Non susceptible

S


>Click here to view the species photo gallery



Jarrah