Jarrah

COMMON APPLICATIONS
Decking
Decking
Decking
Decking
Decking
Decking
Decking
Decking
Decking

Jarrah is native to south western Australia, it is a heartwood with a rich dark brownish red colour. It can have straight or interlocked grain with an even medium coarse texture. Considered to be one of the world's most durable timbers. Typical uses include heavy construction, general joinery,  boatbuilding and other marine applications. The warm colours and high density make for excellent T&G flooring. Gum veins are common and add to the natural character.

A large tree producing light to dark red timber, darkening to a uniform red-brown mahogany colour. It can have a straight or interlocked grain with an even medium coarse texture.

We do not recommend acrylic coating with Jarrah. Water based coating can change the colour from rich reddish-brown to a dark orange; a solvent may change the color from natural rich reddish-brown to light reddish/orangey- brown. We only recommend an oil stain, that keeps the natural deep reddish-brown color of the timber itself.

Endgrain: Diffuse large pores arranged in diagonal rows, few solitary growth rings, narrow rays with normal spacing but not visible to the naked eye.

Rot Resistance: Jarrah is rated as very durable in terms of decay resistance.  It is also quite resistant to insect attack. 

Workability: Jarrah tends to be difficult to machine due to its high density and interlocked grain. It also has a moderate blunting effect on cutting edges but it does turn, glue, and finish well. 

Common uses: Flooring, heavy construction, veneer, cabinetry, outdoor furniture, and turned objects. 

 

 

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Botanical Name: Eucalyptus Marginata
Origin: Australia
  • Overview
  • Basic Info
  • Technical

General

Certifications Available::
PEFC
Seasoning: Seasons readily by air or kiln drying although there can be some warping due to sloping grain and some care is required to prevent checking in wide boards. Pre-air-drying is recommended.
Working Qualities: It machines, nails and glues well; takes an excellent polish and holds paint very well. It is also prized as a carving timber.
Uses: One of the world’s most durable timbers and highly resistant to fire, termite and marine borer attack and impervious to acids. Jarrah has a very wide range of uses, previously regarded as a heavy construction timber for bridges and wharves it is now favoured for interior finishing, joinery, cabinet-making and flooring.
Price (1-10): 6

Availability

Availability: Available ex-stock in sizes from 100x25 to 300x50mm
Stocked: Yes
Grade Description: Select
Availability http://www.ntp.net.au/docs/permissible_characteristics.pdf
Grade Rules http://timspec.co.nz/filescust/event/Jarrah%20Grade%20rules.pdf

Supply

Primary Suppliers: Gunns Western Australia
Resource Certification: ISO 14001

Durability

Durability Above Ground: Very Durable

Density

Density Air Dry: 820 kg/m3

Shrinkage

Shrinkage Radial: More than 5% %
Shrinkage Tangental: More than 8% %

Stability

Stability Kiln Dry: Stable
Stability Green: Prone to shrinkage and distortion

Mechanical Properties

Janka Hardness: 10 kN
Modulus of Rupture: 112 MPa
Modulus of Elasticity: 13 GPa
Max Crush Strength: 61 MPa

Fire

NZAS lgnitability: 13
NZAS Flame Spread: 3
NZAS Heat Evolved: 4
NZAS Smoke Developed: 2
ASTM Flame Spread: 42

Phone our sales team on (09) 620-0260 or Email us anytime, we'd be happy to help.