Corymbia maculata, commonly known as spotted gum, is a species of medium-sized to tall tree that is endemic to eastern Australia. We recommend asking us about our additional staining service so we can supply the panels sealed to avoid any resin leaching out. Tip.1 Before oiling your Spotted gum deck with protective coatings for the first time its generally a good idea to allow the timber to release its natural tannin. Spotted gum Spotted gum is very similar to blackbutt, with the same durability and fire-resistance properties. This becomes a problem when the timber is exposed to moisture. Visit your local store for the widest range of building & hardware products. Spotted Gum leaches less tannin. Other durable hardwoods you could consider include spotted gum, tallowwood and ironbark. Weight: 1000 kg: Dimensions: 4.2 x 1.9 mm: Similar Products. Spotted Gum is Australia’s most harvested native hardwood, making it widely available. I have the underside of the decking boards ,joists and bearers painted in a Bristol russett Brown colour. Spotted Gum (preservative-treatment) Tallowwood. An Interview with a Green Architectural Designer: Craig Jarvis, Good Wood – The Importance of Good Forest Management. Eucalypt timbers such as Spotted Gum and Blackbutt to name a few, have a high tannin content. Bamboo – Really the Sustainable Timber Choice? This is in part due to the tannins from the surrounding trees. Appropriate commercially available species include Blackbutt, Spotted gum, Ironbark, Turpentine, Tallowwood, River red gum, Blue gum, Merbau, Treated pine and Cypress. 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. Care. Spotted gum: Durability is class 1. They are fire-resistant and durable. Spotted Gum is definitely very hard-wearing, and it is heavy enough to sink in water. Draffin Street Furniture use only kiln dried hardwood, with a moisture level at industry standards. Thermally Modified Ash - A Dying Resource? Image: Porta Bleed Trial. good luck jimj Returns policy. The process occurs in all timbers with some timbers causing dramatic damage to surrounding areas. 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, sometimes known as tannin bleed, is when your timber cladding or timber decking bleeds or leaks onto the surrounding surfaces. This means tannin staining and bleed-through is less of a problem. Spotted Gum Dressed all round Spotted Gum Decking. Spotted gum is less durable in the ground than ironbark or tallowwood (Class 2 v. Class 1). Keeping your deck clean and pristine will not only make it more appealing, cleaning the wood will help it last longer and protect it from harmful substances. 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. My preference is for spotted gum which is what I have throughout my decks. It may be possible to reduce tannin leaching by washing the timber with deck washes and timber cleaners, although in most cases this reduces, rather than eliminates the tannin bleed. Another option is ironbark decking. Specifications . They will probably leach less than merbau, but some staining is still likely as most hardwoods have some tannin content. Of these the most stable dimension is 65mm ... All timbers leach tannins during rain. 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. I love spotted gum and use it for 90 per cent of my projects. Staining over the Merbau will also help protect the timber and enhance the durability of the product. Hardwood versus Softwood Cladding: Which is Better? 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. Low Tannin Content. At Sculptform, we help busy architects realise their creative vision by offering versatile feature wall, ceiling and facade systems and expert advice. ... Merbau ranges from orange brown to dark reddish brown with a high tannin content susceptible to leaching if left uncoated. We are building a new deck in our backyard (in Canberra) and have gotten quotes for two timbers – merbau and spotted gum. Sizes of Decking Decking is commonly available as 65 x 19mm, 86 x 19mm and 135 x 19mm. We recommend gently sanding the surface and applying a UV-stable exterior grade oil such as decking oil every six months. 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. Spotted Gum, despite its strength and density is a great timber to work with as it has few imperfections and a good level of natural oils which allow easy machining. Spotted gum is dense and durable, has minimal tannin leach, and has a lifespan of over 40 years. 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. Tannin stain is not only unsightly, but can it can block the cell structure of the wood preventing it from absorbing timber coatings evenly, in some cases giving an overall dull and patchy look. good luck jimj ... our Spotted Gum will gradually transform in the outdoors. Our house is red brick so it would look nicer against it too. 1. The tone of the timber will alter over time with exposure to UV light and timber leaching may occur. There is not another timber in the world like Spotted Gum. The timbers were exposed to the external elements for ten days. Spotted Gum is classed as a dense ground-contact hardwood that will stand up to the elements. It matches the stain I use fairly close in colour. Even light-coloured timbers leach. Architects and designers throughout the world value Spotted Gum timber for its back-sawn grain structure, attractive markings and vibrant colour palette. Spotted Gum (preservative-treatment) Tallowwood. The results demonstrated that Merbau had excessive staining, Spotted Gum had some staining and Cumaru had no visible marks. The timbers were exposed to the external elements for ten days. 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. Some species - like Merbau - have very dark tannin runs. A Degree of Fire-Resistance. Top to bottom: Day 1 to Day 10 results. Our house is red brick so it would look nicer against it too. ... Leaching of CCA from treated fencepost was evaluated by atomic absorption spectroscopy. The timber cell structure can be likened to millions of plastic straws bundled tightly together - so if a lot of water travels down the board it ‘flushes’ out the tannins in the wood causing the surrounding surfaces to become stained. Spotted Gum is well known for its overall reliability. 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. Leaching or tannin bleed, is when timber cladding or decking bleeds onto the surrounding surfaces. I like the natural variation of spotted gum and have heard that it is more durable too. 2.Spotted Gum Decking The biggest advantage of Spotted Gum Decking is that it can tolerate harsh weather climates, which makes it ideal for outdoor use. It matches the stain I use fairly close in colour. Spotted Gum. Field testing of CCA-treated Brazilian spotted gum. DeckWise® – Hidden Deck Fasteners & Accessories, Porta Cumaru – Hardwood Decking and Landscaping. The tannin leaching can continue for months, particularly with timbers that have a high tannin content such as Kwila or Merbau. Moreover, extractives and the acid insoluble lignin were quantified. Guiding Rules for Choosing Ethical Timber. Weathering relies on timber naturally getting wet and dry several times to leach the tannin & oils, generally this takes between 4- 6 weeks but depends on weather exposure and your type of timber. 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. Tallowwood, Ironbark, and Spotted Gum are all Class 1 timbers, with potential lifespans of 40+ years. Answer: Leaching of tannin commonly occurs if merbau is exposed to rain without a coating, or with a coating that allows moisture to penetrate. However, above ground spotted gum is rated Class 1, the same as ironbark and tallowwood. The tannin leaching can continue for months, particularly with timbers that have a high tannin content such as Kwila or Merbau. When the ends of timber are cut and moisture enters the grain and timber cells, tannins and extractants are released. However, the eggs need a strong and stable concentration of ammonia to hatch. These timbers are milled from heartwood (not sapwood) and are a mix of Tallowwood, Spotted Gum and Iron Bark. 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. Delivery is available, please call us on 1300 650 787. Porta are still operating, however as part of our CovidSafe plan we have a variety of safety measures in place. Spotted Gum is a fairly hard timber, so anything between 40-120 grit will work. I am seeking advice as to which oil, tung, linseed, etc., is the best finish. The most effective solution for leaching, is to use a thermally modified timber such as our Vulcan timber. A body with low ammonia in the urine would prompt the eggs to eva… Spotted Gum is extremely popular for flooring, decking and cladding. As far as cupping goes in wider boards, stay away from the 19mm thick stuff and use 25mm or 32mm boards. How Long Does Charred Wood (Shou Sugi Ban) Last? How Sustainable are Australian Hardwoods? We supply New Zealand vineyards (such as Pernod Ricard Winemakers – Church Road) with NON-TREATED Class 1 (25 year in-ground durability – 40 years plus out of ground durability) hardwood timbers. Forest Reds and Jarrah…Red tones. Have you ever noticed how discoloured river water is? 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. Staining over the Merbau will also help protect the timber and enhance the durability of the product. 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. 1. Is Aluminium Cladding More Sustainable Than Wood Cladding? ... starting to split/crack and tannin was leaching up quite a bit. How Often Do I Need To Re-coat Exterior Timber? However, there are specific characteristics you need to consider when building with this natural material. These included the Australian classics like Spotted Gum, Blackbutt & Ironbark that are sought after around the world for their strength, durability and style. I have the underside of the decking boards ,joists and bearers painted in a Bristol russett Brown colour. The Future of Wood - The Story of Abodo Eco Timber. Commonly used in exterior applications for outdoor furniture and decking. The Decking Debate: Grip Tread – Up or Down? If leaching is critical perhaps a species such as cypress pine would be a better choice since tannin staining is essentially a hardwood problem. Biodegraded untreated spotted-gum wood shows a decrease of more than 25% in polysaccharide content, with subsequent increases of extractives and Klason lignin, a typical brown-rot fungi attack. It is in the highest category of durability class – Class 1. Share. Red Alert: 10 Ways to Get Bushfire-Ready Black spots on your deck might be fungi decaying the wood or tannin stains. Timber Posts. The most common solution is to use a ‘tannin remover’. For samples or more information, please get in touch. 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. Reply. The majority of tannin bleed comes from the ends of a timber board, which is to do with the cell structure. Merbau vs blackbutt decking Merbau is a cheap and attractive timber, but is unsustainably sourced and prone to tannin leach. I prefer the latter due to sustainability concerns as well as appearance. Porta Cumaru has near zero leaching properties making it the ideal choice for a range of external decking and cladding applications even next to pools and spas. Final order quantities are the buyer’s responsibility and should be checked and verified prior to order placement. However, more often this only reduces the ‘natural extractives’ in the timber rather than eliminating them completely. Merbau vs blackbutt decking Merbau is a cheap and attractive timber, but is unsustainably sourced and prone to tannin leach. ... Leaching . It can easily be painted or stained to further enhance the look of the timber. © Porta Mouldings Pty Ltd 2015. [Video], How to Tackle Mould and Stain on Wood [Video], Semi Transparent Exterior Wood Finishes: What To Use, Intumescent Fire Retardant Paint for Timber, Site Storage and Handling of Weatherboards, New Fire Retardant Regulations for External Cladding, Column Cladding – Create a Large Section Solid Wood Look, Abodo Secret Fix Cladding Installation Tips [Video], Creating an E2/VM1 Weather-tight Timber Cladding System for The Block TV Series, Tips for Weather-tight Cladding Systems and Installation, Camo – The Preferred Concealed Fix Decking Fastener, Decking Installation – Common Problems [Video]. Spotted Gum is an extremely adaptable and naturally strong timber which makes it ideally suited to numerous applications. 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. 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