Recent studies have generated conflicting data regarding the bioaccumulation and toxicity of leachates from preservative-treated wood. ... Merbau ranges from orange brown to dark reddish brown with a high tannin content susceptible to leaching if left uncoated. It is in the highest category of durability class – Class 1. ... Leaching of CCA from treated fencepost was evaluated by atomic absorption spectroscopy. While it is excellent for machine work, Spotted Gum is also a good timber for carving and woodturning. It is a long-lasting Australian hardwood that is a little darker than blackbutt and often has some intriguing colour variations. Architects and designers throughout the world value Spotted Gum timber for its back-sawn grain structure, attractive markings and vibrant colour palette. Appropriate commercially available species include Blackbutt, Spotted gum, Ironbark, Turpentine, Tallowwood, River red gum, Blue gum, Merbau, Treated pine and Cypress. The 135mm spotted decking can be prone to cupping in some instances (ie drop or in middle) according to some, I have never seen it though. Moreover, extractives and the acid insoluble lignin were quantified. Stringybark: Durability is class 3. For timber, leaching should be considered when choosing a species. The timber of some decking woods, like Kwila, will leach a dark coloured stain when wet. I prefer the latter due to sustainability concerns as well as appearance. Class 1 durability above ground -Termite Resistant – BAL 29 – medium Leaching – Janka hardness 9.1 Standard sizes are- 42×19, 65×19, 86×19, 130×19, 136×22, 140×35 and others available. Timber Weatherboards and Dark Coloured Paint, Locally Grown Alternative to Lawsons Cypress and Lusitanica, Finish Quality: Timber Weatherboards vs Fibre Cement Weatherboards, Reducing Carbon Footprint – A Case Study: Cardrona Cabin, Five Rules for Choosing Truly Sustainable Timber, Renewable Energy in the Production of Wood Products, Biomass Growth and Carbon Sequestration - A Comparison of Tree Species. This is a premium Australian timber in Blackbutt and Spotted gum. I have the underside of the decking boards ,joists and bearers painted in a Bristol russett Brown colour. Tannins are natural extractives present in certain timbers, and this leaching can cause unsightly stains on surrounding materials, most notably light coloured ones. At Sculptform, we help busy architects realise their creative vision by offering versatile feature wall, ceiling and facade systems and expert advice. I am seeking advice as to which oil, tung, linseed, etc., is the best finish. Spotted Gum Species Data Sheet Common Name/s Spotted Gum, Lemon-scented Gum ... Leaching of Tannins Staining is likely on adjacent surfaces after exposure to the elements. The Red List – Materials to Watch Out For! Merbau and Red Iron Bark…red to brown tone so Autumn Tone, New Bronzetone, Burnt Red and Chestnut will all look very similar on smooth wood. Applications: Spotted gum is suitable for a range of building applications, such as posts and poles, framing, flooring, lining, decking and cladding. We recommend gently sanding the surface and applying a UV-stable exterior grade oil such as decking oil every six months. These timbers are milled from heartwood (not sapwood) and are a mix of Tallowwood, Spotted Gum and Iron Bark. Blackbutt has natural features like Gum Veins and pin holes so when choosing Blackbutt you need to expect some visible natural features. Kwila-look finish. Porta Cumaru decking can be supplied with a factory applied pre-oiling and end-grain sealing treatment to ensure optimal colour fastness as your timber arrives ready to be installed. After 12 months it looked awful and after 18 months I gave up on the test as a joke and threw it out. Take a look at these projects featuring Cumaru timber decking. Leaching of heavy metals into the soil after 6 yr is minimal for arsenic and much below Brazilian environmental law limits for chromium and copper. Care. The truth is that the secret to a good deck is. Delivery is available, please call us on 1300 650 787. Spotted Gum…Light creamy to brown and greys. Hard wearing and low maintenance, it can withstand our harsh and ever changing Australian climate. Spotted gum is currently QLD’s largest harvested native hardwood by volume, meaning that spotted gum is widely available throughout Australia, with quantities also being exported internationally. Leaching occurs when timber releases its natural oils and resins when exposed to moisture. My preference is for spotted gum which is what I have throughout my decks. Timber posts should be placed on stirrups rather than in the ground where possible. This means tannin bleed is highly unlikely, allowing home owners to rest easy. This is in part due to the tannins from the surrounding trees. Porta are still operating, however as part of our CovidSafe plan we have a variety of safety measures in place. Spotted Gum is sustainably sourced from plantations throughout Australia and is a very popular hardwood, which is durable, dense and has minimal tannin leach. Spotted gum is currently QLD’s largest harvested native hardwood by volume, meaning that spotted gum is widely available throughout Australia, with quantities also being exported internationally. Reply. I like the natural variation of spotted gum and have heard that it is more durable too. What is Forest Certification – and Why is it Important? Merbau vs blackbutt decking Merbau is a cheap and attractive timber, but is unsustainably sourced and prone to tannin leach. Eucalypt timbers such as Spotted Gum and Blackbutt to name a few, have a high tannin content. ... our Spotted Gum will gradually transform in the outdoors. No Video Content. What Are Concealed Fix Vertical Shiplap Weatherboards? Plus, it’s naturally resistant to fire, making it the perfect decking option for people who live in fire-prone, bush or tree-dense areas. The density of spotted gum also means it does not absorb significant amounts of moisture from short-term wetting, but only when exposed to moisture for prolonged periods. Siberian Larch Cladding and Weatherboards in the New Zealand Context, Alternatives to Paint Finish Cedar Weatherboards, Creating Old School Dark Finishes for Natural Eco-timber, Timber Weatherboards - Dark Colours Can Be Done, Timber Batten Screening - For Shade and Privacy, Designing for Timber Cladding in Bushfire Attack Level (BAL) Zones - Australia, Low Maintenance Alternative to Kwila Decking Oil and Stain, Reinvention of Ancient Wood Protection Technology. Spotted Gum is an extremely adaptable and naturally strong timber which makes it ideally suited to numerous applications. The tannin leaching can continue for months, particularly with timbers that have a high tannin content such as Kwila or Merbau. It is in the highest category of durability class – Class 1. Forest Reds and Jarrah…Red tones. Spotted Gum is a fairly hard timber, so anything between 40-120 grit will work. An Interview with a Green Architectural Designer: Craig Jarvis, Good Wood – The Importance of Good Forest Management. As well as doing classic hardwood flooring, Market Timbers stock a wide variety of solid timber decking materials in different grades, sizes and made with a number of popular wood species such as Spotted Gum, Merbau, Jarrah and Grey or Red Ironbark. Commonly used in exterior applications for outdoor furniture and decking. Rustic Gold and Sela Brown will all look similar on new smooth wood. Merbau vs blackbutt decking Merbau is a cheap and attractive timber, but is unsustainably sourced and prone to tannin leach. However, there are specific characteristics you need to consider when building with this natural material. Corymbia maculata, commonly known as spotted gum, is a species of medium-sized to tall tree that is endemic to eastern Australia. Plus, it’s naturally resistant to fire, making it the perfect decking option for people who live in fire-prone, bush or tree-dense areas. Timber posts should be placed on stirrups rather than in the ground where possible. The timbers were exposed to the external elements for ten days. Author links open overlay panel Washington Luiz Esteves Magalhães a b Bruno Dufau Mattos c André Luiz Missio d. Show more. It matches the stain I use fairly close in colour. Bamboo – Really the Sustainable Timber Choice? spotted gum The attractive and durable hardwood is an ideal timber decking. The timbers were exposed to the external elements for ten days. Spotted Gum is a beautiful Queensland specie timber, botanically named Corymbia Citriodora, and is a unique blend of brown and grey colours. Spotted gum is currently QLD’s largest harvested native hardwood by volume, meaning that spotted gum is widely available throughout Australia, with quantities also being exported internationally. However, more often this only reduces the ‘natural extractives’ in the timber rather than eliminating them completely. There is not another timber in the world like Spotted Gum. The two pieces of timber were left in water for three days to identify which leached the most extractives. A body with low ammonia in the urine would prompt the eggs to eva… The oil coating offers up something natural and unique. Spotted gum is known as a relatively tough and durable choice, with a Janka Hardness rating of 11. Spotted Gum is Australia’s most harvested native hardwood, making it widely available. Spotted Gum is extremely popular for flooring, decking and cladding. Thank you! Share. The tone of the timber will alter over time with exposure to UV light and timber leaching may occur. Returns policy. Even light-coloured timbers leach. If leaching is critical perhaps a species such as cypress pine would be a better choice since tannin staining is essentially a hardwood problem. Spotted Gum (preservative-treatment) Tallowwood. Thickness (finished dressed) Given some of the sawmilling supply constraints Timbeck has to deal with the chosen finished Of these the most stable dimension is 65mm ... All timbers leach tannins during rain. Spotted gum Spotted gum is very similar to blackbutt, with the same durability and fire-resistance properties. Spotted Gum is extremely popular for flooring, decking and cladding. This can cause brown, black or rusty looking ‘bleed’ marks on nearby surfaces. We specialise in timber decking in Melbourne, Sydney, Brisbane, Adelaide, Perth and most parts of Australia. Spotted gum One of the most commonly used Australian hardwoods, spotted gum, is loved by designers and architects the world over for its beautiful grain structure and attractive markings. Weight: 1000 kg: Dimensions: 4.2 x 1.9 mm: Similar Products. Care. The colour variations are also available from deep red to light golden brown- an aspect that can give versatility to your decor and itsts4 gum-veins add peculiarity to its appearance. Weatherboard Options for Re-cladding Your Home, Feature Balustrades - An Architectural Trend, Natural Wood Cladding Textures and Finishes, Feature Walls – Bringing the Warmth of Timber Indoors, Bamboo Exterior Decking Versus Wood Decking. What You Should Know About Chemically Treated Timber [Video], Timber Recessed Windows Becoming Increasingly Popular, Brazilian Modernist - An Australian Architectural Trend. It is also sustainable. Natural Weathering of Timber - Surface Checking, How Often Do I Need To Stain Timber Cladding, The Importance of End Sealing Decking and Cladding in Exterior Applications, Comparing Composite Decking With Real Wood, Fastener Oxidation – An Unsightly Stain on Timber Cladding, Exterior Timber Stains and Discolouration, Exterior Wood Coatings – What to Use? How Often Do I Need To Re-coat Exterior Timber? Spotted Gum leaches less tannin. Top to bottom: Day 1 to Day 10 results. ... Merbau ranges from orange brown to dark reddish brown with a high tannin content susceptible to leaching if left uncoated. Red Alert: 10 Ways to Get Bushfire-Ready The process occurs in all timbers with some timbers causing dramatic damage to surrounding areas. Spotted Gum is classed as a dense ground-contact hardwood that will stand up to the elements. It can easily be painted or stained to further enhance the look of the timber. Sizes of Decking Decking is commonly available as 65 x 19mm, 86 x 19mm and 135 x 19mm. Sizes of Decking Decking is commonly available as 65 x 19mm, 86 x 19mm and 135 x 19mm. The tannin leaching can continue for months, particularly with timbers that have a high tannin content such as Kwila or Merbau. The Future of Wood - The Story of Abodo Eco Timber. It is also used for indoor and outdoor furniture, turnery, joinery and in the manufacture of veneer and plywood. The tannin leaching can continue for months, particularly with timbers that have a high tannin content such as Kwila or Merbau. Final order quantities are the buyer’s responsibility and should be checked and verified prior to order placement. Spotted Gum. Find Hardwood Decking Spotted Gum STD BTR 135x32mm LM at Bunnings Warehouse. I love spotted gum and use it for 90 per cent of my projects. My initial purchase of variable length Spotted Gum was somewhat shy of finishing the job, but I discovered that it was actually cheaper to buy the remainder from more-expensive Bunnings, as I could then get to choose the exact lengths needed to complete the job. These leeches enter through a physical wound and lay eggs in the bladder. We recommend asking us about our additional staining service so we can supply the panels sealed to avoid any resin leaching out. 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