What is Forest Certification – and Why is it Important? It’s also resistant to tannin leach. Resin Bleed - A Major Issue For Exterior Timbers, Reclaimed Timber Cladding - An Old Look Making a Comeback, The Verdict on Redwood Weatherboards in New Zealand, Timber Weatherboards Versus Fibre Cement Weatherboards, How to Minimise Timber Leaching and Tannin Bleed, Random Width, Random Thickness Timber Cladding, Timber Cladding: The New Alternative in Natural Wood Cladding [Video], Keep It Simple: The Low Cost Durable Timber Weatherboard. Spotted Gum is an extremely adaptable and naturally strong timber which makes it ideally suited to numerous applications. 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. For timber, leaching should be considered when choosing a species. This becomes a problem when the timber is exposed to moisture. The tannin will leech out, causing staining on the timber, as well as any surrounding surfaces such as concrete, painted surfaces and tiles etc. No Video Content. The tannin leach is susceptible. It is a long-lasting Australian hardwood that is a little darker than blackbutt and often has some intriguing colour variations. Care. Another option is ironbark decking. In areas known for bush fires, spotted gum that’s at least 18 mm thick doesn’t require fire retardant treatment. Spotted Gum is a beautiful Queensland specie timber, botanically named Corymbia Citriodora, and is a unique blend of brown and grey colours. The tannin leaching can continue for months, particularly with timbers that have a high tannin content such as Kwila or Merbau. Make sure you get the right information about our carefully crafted timber products by visiting your local Abodo website. 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. Shop now. I have the underside of the decking boards ,joists and bearers painted in a Bristol russett Brown colour. Thermally Modified Ash - A Dying Resource? Returns policy. Find Hardwood Decking Spotted Gum STD BTR 135x32mm LM at Bunnings Warehouse. Copy Link to Post. However, the eggs need a strong and stable concentration of ammonia to hatch. Tallowwood, Ironbark, and Spotted Gum are all Class 1 timbers, with potential lifespans of 40+ years. We recommend gently sanding the surface and applying a UV-stable exterior grade oil such as decking oil every six months. 1. ... Merbau ranges from orange brown to dark reddish brown with a high tannin content susceptible to leaching if left uncoated. It has natural oils and a lower tannin content, so it accepts oil and stain well and doesn’t experience bleed-through. Merbau vs blackbutt decking Merbau is a cheap and attractive timber, but is unsustainably sourced and prone to tannin leach. Kwila-look finish. Timber posts should be placed on stirrups rather than in the ground where possible. Appropriate commercially available species include Blackbutt, Spotted gum, Ironbark, Turpentine, Tallowwood, River red gum, Blue gum, Merbau, Treated pine and Cypress. Other durable hardwoods you could consider include spotted gum, tallowwood and ironbark. 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 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. Stringybark: Durability is class 3. An Interview with a Green Architectural Designer: Craig Jarvis, Good Wood – The Importance of Good Forest Management. Is Aluminium Cladding More Sustainable Than Wood Cladding? Some species - like Merbau - have very dark tannin runs. Leaching commonly occurs when certain timbers, for example Kwila (Merbau), Spotted Gum, Blackbutt, Balau and Tallowood are exposed to rain without a sealant or coating. Spotted Gum is extremely popular for flooring, decking and cladding. Porta are still operating, however as part of our CovidSafe plan we have a variety of safety measures in place. The Future of Wood - The Story of Abodo Eco Timber. Guiding Rules for Choosing Ethical Timber. Red Alert: 10 Ways to Get Bushfire-Ready Weight: 1000 kg: Dimensions: 4.2 x 1.9 mm: Similar Products. ... Leaching . Reply. Sizes of Decking Decking is commonly available as 65 x 19mm, 86 x 19mm and 135 x 19mm. Leaching, sometimes known as tannin bleed, is when your timber cladding or timber decking bleeds or leaks onto the surrounding surfaces. © Porta Mouldings Pty Ltd 2015. 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. Find out more about Porta Cumaru hardwood here. The tannin will leech out, causing staining on the timber, as well as any surrounding surfaces such as concrete, painted surfaces and tiles etc. DMDHEU – New Wood Modification for Australasia, The Dangers of Silica Dust – Fibre Cement Board Products, What are “VOC’s”: Volatile Organic Compound Emissions, The Precautionary Principle: Eliminating Harmful Products From Our Buildings, New Study – Wood and it’s Physiological Benefits – Planet Ark, The Relative Toxicity of Wood Preservatives: Eco Building. Eucalypt timbers such as Spotted Gum and Blackbutt to name a few, have a high tannin content. 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. It matches the stain I use fairly close in colour. The tone of the timber will alter over time with exposure to UV light and timber leaching may occur. Tallowwood, Ironbark, and Spotted Gum are all Class 1 timbers, with potential lifespans of 40+ years. 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. 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. Due to the scale of the wood preserving industry, timber treated with the most common preservative, chromated copper arsenate (CCA), may form a significant source of metals in the aquatic environment. 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. Abodo will not accept liability for over or under-ordered items. Merbau vs blackbutt decking Merbau is a cheap and attractive timber, but is unsustainably sourced and prone to tannin leach. When you spend $60+ per square metre on timber decking, it pays to maintain its condition.You have to consider a number of options: oiling, painting, or staining, but there are a number of reasons why oiling is the best way to go. Timber posts should be placed on stirrups rather than in the ground where possible. 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. It is in the highest category of durability class – Class 1. After 12 months it looked awful and after 18 months I gave up on the test as a joke and threw it out. Our house is red brick so it would look nicer against it too. For samples or more information, please get in touch. What You Should Know About Chemically Treated Timber [Video], Timber Recessed Windows Becoming Increasingly Popular, Brazilian Modernist - An Australian Architectural Trend. Of these the most stable dimension is 65mm ... 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