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 un coated, 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

Pilularis (Blackbutt) New Zealand


This hardwood is grown in northern NZ, but log supply is limited. Colours are cream to light brown, with little visible grain and medium texture. Some gum vein is present.Mostly used for T&G flooring and stair construction.

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Botanical Name: Eucalyptus pilularis
Other Names: Black Butt
Origin: New Zealand


Certifications Available::
Uses: Mostly used for T&G flooring and stair construction.
Price (1-10): 4


Availability: Available ex-stock in sizes ranging from 75 x 25mm up to 300 x 40mm. No 50mm thick timber is available.
Stocked: Yes


Durability In Ground: Moderately Durable
Durability Above Ground: Durable


Density Air Dry: 720 kg/m2


Shrinkage Radial: 3 %
Shrinkage Tangental: 5.3 %


Stability Kiln Dry: Reasonable Stable

Mechanical Properties

Janka Hardness: 19 kN
Modulus of Rupture: 140 MPa
Modulus of Elasticity: 14 GPa
Max Crush Strength: 68 MPa


NZAS lgnitability: 13
NZAS Flame Spread: 6
NZAS Heat Evolved: 5
NZAS Smoke Developed: 3
ASTM Flame Spread: 48

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


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