Rich Colour, Striking Grain, Serious Durability
Spotted Gum (Corymbia maculata and related species) grows along the east coast of Australia from Victoria through New South Wales into Queensland. Its heartwood spans an unusually wide and attractive palette — pale greyish-honey, warm mid-browns, reddish tones and deep chocolate — often within the same project, giving Spotted Gum cladding a lively, layered appearance. The grain is frequently wavy and interlocked, producing the prized 'fiddleback' figure sought by architects and designers, with a moderately coarse, even texture. Beyond its looks, Spotted Gum is a genuine performer. With a Janka hardness around 11 kN and a density of roughly 950 to 1,010 kg/m³, it is one of the harder commercial hardwoods, rated Class 1 for above-ground durability and commonly approved for use up to BAL-29 in bushfire-prone areas. A useful practical bonus for cladding is its relatively low tannin leaching, which makes it a sensible choice over light-coloured substrates where staining from run-off is a concern. Note that the sapwood is susceptible to lyctid borer and should be specified accordingly.
Why Choose Spotted Gum Cladding
Technical Specifications
Botanical name
Corymbia maculata (and related Spotted Gum species)
Heartwood colour
Pale honey-grey through warm browns to deep chocolate
Natural durability
Class 1 above ground
Janka hardness
approx. 11 kN
Density (seasoned)
approx. 950–1,010 kg/m³
Termite resistance
Durable heartwood; sapwood lyctid-susceptible
Bushfire rating
BAL-29 (bushfire-resisting timber under AS 3959; confirm per site)
Grain & texture
Wavy/interlocked grain (fiddleback figure), moderately coarse even texture
Typical applications
External cladding, internal feature walls, decking, flooring, structural
Where Spotted Gum Cladding Performs Best
Architectural and feature facades where colour, figure and impact are the priority.
Premium residential cladding for contemporary, coastal and traditional homes.
Commercial and hospitality frontages where a striking natural timber look adds value.
Cladding in designated bushfire-prone areas up to BAL-29 (confirm per AS 3959).
Cladding installed over light-coloured render or substrates, thanks to low tannin leaching.
Dramatic internal feature walls and ceiling lining.
Spotted Gum Cladding Profiles & Grades
Spotted Gum cladding can be supplied in a choice of popular profiles to suit the look you are after — from crisp shiplap and tongue-and-groove boards that create clean, contemporary shadowlines, through splayed weatherboard and board-on-board profiles for a more traditional feel, to square-edge and channel profiles for a modern, linear aesthetic. Cover width has a big impact on the finished look: narrower boards read as fine and detailed, while wider boards give a bolder, more streamlined facade. Our team can talk through the options and help you choose the profile and width that best suit your design and budget. Grade is the other key choice. Cleaner, lower-feature grades give a calm, uniform appearance, while character or feature grades showcase the natural colour variation, grain and markings that make Spotted Gum distinctive. Because timber is a natural product, every board is unique, so we recommend reviewing a current sample or batch before committing to a large order. Tell us the profile, width and grade you are leaning towards and we will confirm what is available and provide samples where possible.
Get Your Free QuoteWorking With and Maintaining Spotted Gum
Spotted Gum is very dense, so pre-drilling near board ends is essential to prevent splitting, and quality fixings (304/316 stainless near the coast) should be used; keep tooling sharp. Fix cladding over battens with a drained, ventilated cavity, detail the work to shed water, and seal cut ends. Where a bushfire rating applies, follow AS 3959 requirements. Specify heartwood, or treated sapwood, given the sapwood’s lyctid susceptibility. To preserve Spotted Gum’s rich colour and figure, finish with a quality exterior coating or oil and re-apply periodically depending on exposure; UV-stabilised coatings help hold the colour. Left uncoated, it weathers to a silver-grey while keeping its durability. Its low tannin leaching reduces the risk of run-off staining onto adjacent light surfaces, but good detailing and ventilation remain important for maximising service life.
Get Your Free QuoteSustainable & Ethically Sourced
JVS Timber sources Spotted Gum from certified Australian producers and supplies product compliant with Australian industry standards. A renewable native hardwood with Class 1 durability, Spotted Gum is a sustainable cladding choice whose long service life avoids the waste of early replacement. FSC-certified options are available on request.
Get Your Free QuoteSpotted Gum Sizes & Availability
JVS Timber supplies Spotted Gum cladding in a choice of popular profiles and grades — from clean, low-feature selections to character grades showcasing colour variation and figure — in a range of cover widths and lengths. Whether you need a feature-wall quantity or bulk cladding for a full facade or commercial project, our team can confirm current stock, profiles, sizes and competitive trade pricing, delivered Australia-wide.
Get Your Free QuoteSpotted Gum Cladding — Frequently Asked Questions
Spotted Gum has an unusually broad colour range — honey, brown, red and chocolate tones — often within the same project, combined with a wavy, interlocked 'fiddleback' grain. The result is a lively, layered facade with real depth and character.