One of the most important things for Landscaping is Durability. We have listed out different types of timbers and their character, grouped by colour below. 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 needed 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, Refer to our Coatings page for outdoors.
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 maintain periodically. 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.
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 |
Spotted Gum is strong and durable timber with good amount of natural oils. The heartwood ranges from a pale brown, to dark chocolate brown, to deep red-brown, while the sapwood is white to light brown in colour. Spotted Gum is also a very attractive timber with moderately course texture and a typically wavy grain. Many people favour Spotted Gum because of this wavy grain, which can produce an attractive fiddle-back figure. Care needs to be taken in drying Spotted gum for internal applications as the coarse nature of the timber can create surface checking if dried too quickly or too far.
Due to its strength and durability, Spotted Gum is regularly used in heavy engineering, infrastructure and structural projects. It is used in in mining, in shipbuilding, in bridge and wharf construction, and to make agricultural machinery, railway sleepers, cross arms, poles and piles.
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Satisfactorily dried using conventional air and kiln seasoning methods.
Spotted Gum, despite its strength and density is a great timber to work with as it has a good level of natural oils which allow easy machining. It accepts oil and stain well, and has a lower tannin content that most other eucalyptus species. This means tannin staining and bleed-through is less of a problem. While it is excellent for machine work, Spotted Gum is also a good timber for carving and woodturning.
House framing, retaining walls, decking, fencing, landscaping, internal and external flooring, cladding, lining and joinery, indoor and outdoor furniture, plywood, veneer, bridge and wharf construction, poles and piles.
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Phone our sales team on (09) 620-0260 or Email us anytime, we'd be happy to help.