Timber Landscaping

Timber for Landscaping Accoya Wood BridgeTimber for Landscaping

One of the most important things for Landscaping is Durability. Check out our Learning Centre, and take a look at the Durability page. This explains how durability is measured. We have listed all our Durable and Very Durable timbers in the table below, grouped by colour.It is worth noting that sapwood is not durable at all when talking about the durability we are referring to the heartwood.  Occasionally some boards will have a small amount of sap on the edge and this will either need to be removed prior to use or it will eventually rot.


All timber, if left outside uncoated, will naturally turn a silvery-grey colour.  This is a natural process as the outer layers of the timber cellulose get exposed to the weather.  

The timber will also, split, check and warp, but depending on the species this may not be too noticeable.  One way to reduce weathering and distorting of timber is to coat it with a protective product, we go into each product in more details on our Coatings page

Timber for Landscaping

One of the main things to consider when trying to decide whether to coat your timber or leave it to weather naturally is, if you are willing to put the effort in to maintain the coating.  All exterior coatings will need maintenance on an annual basis (usually just a good clean), and they will require recoating every 6 months to 5 years, depending on the coating and its exposure to the elements.coa


Another buzz word that is becoming more and more common with Landscape Architects is sustainability.  Read both our Sustainability and Resource Certification pages in the Learning Centre if you are keen to learn more.

Timbers Suitable for Exterior Use

Colour Timber Durability
Yellow Yellow Cedar Very Durable
Yellow / Light reddish-brown Balau Durable
Golden yellow / Light brown Macrocarpa Moderately Durable above ground
Golden yellow / Light brown Oregon Moderately Durable
Golden yellow / Light brown Totra Very Durable
Light Pink Taun Moderately Durable
Pink Saligna Durable above ground
Pink / Light brown Cedrela Durable
Light brown Sapele Mahogany Durable
Light brown Vitext Durable
Light brown Western Red Cedar Durable
Straw brown Pilularis (Black Butt) Durable
Medium brown Teak Very Durable
Grey to Reddish/dark brown Spotted Gum Durable
Yellow, fading to Dark brown Iroko Durable
Red, fading to Dark Brown Bubinga Durable
Red/Redish-brown, fading to Dark Brown Jarrah Durable
Red/Redish-brown, fading to Dark Brown Padauk Durable
Red/Redish-brown, fading to Dark Brown Rosewood Very Durable
Red/Redish-brown / Dark Brown Kwila Durable



A hard and very durable timber with rich reddish-brown color tones, typical uses include heavy construction, general joinery,  boatbuilding and other marine applications. The warm colors and high density make for excellent T&G flooring. Gum veins are common and give natural character.

A large tree producing a light to dark red timber darkening to a uniform red-brown mahogany color. 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 color from rich redish-brown to a dark orange; a solvent may change the color from natural rich reddish-brown to light reddish/orangy- brown. We only recommend an oil stain, that keeps the natural deep reddish-brown color of Jarrah.

Sustainability: This wood species is not listed in the CITES Appendices or on the IUCN Red List of Threatened Species. Get a Quote
Botanical Name: Eucalyptus Marginata
Origin: Australia


Certifications Available::
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: 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


Primary Suppliers: Gunns Western Australia
Resource Certification: ISO 14001


Durability Above Ground: Very Durable


Density Air Dry: 820 kg/m3


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


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


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.


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