Appearance of Sugar Gum Timber
Sugar Gum timber has a fine, even texture and a naturally defect-free appearance, thanks to the self-pruning nature of the species. Its color ranges from blonde to tan, with hints of ginger-orange, green, and pink revealed through finishing. Certain trees exhibit interlocking grain that produces striking figures like bee’s wing and fiddle-back, making Sugar Gum an ideal timber for high-quality furniture and decorative applications.
Common Applications of Sugar Gum Timber
Rated Class 1 for durability, Sugar Gum is valued for its strength and wear resistance, making it suitable for indoor and outdoor furniture, flooring, decking, posts, poles, and stair treads. Its warm appearance and distinctive grain patterns also make it popular for joinery and fine furniture. Architectural veneers crafted from Sugar Gum offer a sustainable option to enjoy its beauty with minimal material use. Additionally, its strength and low defect rate make it ideal for structural applications in posts, beams, and heavy construction.
Workability of Sugar Gum Timber
Due to its density, Sugar Gum is challenging to work and requires pre-drilling with a titanium-coated bit. For optimal results, gluing should be done on freshly machined surfaces, ideally with Titebond aliphatic resin glue. Construction techniques like biscuit-jointed corners, floating panels, and clip-attached tops work well. Finished Sugar Gum performs well outdoors, while organic oils, French polishing, and synthetic finishes enhance its color, bringing out a deep honey tone. When left unfinished, the timber weathers to a silver-grey patina.
Durability of Sugar Gum Timber
Sugar Gum has excellent durability, weathering well outdoors, and is resistant to checking. Though it air dries slowly, kiln drying is also effective, yielding stable timber with minimal surface checking. While some expansion and shrinkage may occur, proper laying techniques for hardwood flooring help maintain stability over time.
Origin and Availability of Sugar Gum Timber
Kosny Timber sources Sugar Gum from sustainable plantations in Australia. Though relatively scarce, Sugar Gum’s versatility, high quality, and sustainable credentials have made it increasingly popular in the timber market, where it is prized for both construction and decorative uses.
Very Low | Low | Medium | High | Very High | |
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Tangential : | 10.50% | ||||
Radial : | 6.20% | ||||
Unit Movement Tangential: | |||||
Unit Movement Radial: |
Very High | High | Reasonably High | Medium High | Medium | Reasonably Low | Low | Very Low | |
Unseasoned: | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 |
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Seasoned: | SD1 | SD2 | SD3 | SD4 | SD5 | SD6 | SD7 | SD8 |
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Structural No. 1 | Structural No. 2 | Structural No. 3 | Structural No. 4 | Structural No. 5 | |
Unseasoned: | F17 | F14 | F11 | F8 | F7 |
Seasoned: | F27 | F22 | F17 | F14 | F11 |
Seasoned: |
1105kg/m3
|
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Unseasoned: |
1190kg/m3
|
Very High | High | Reasonably High | Medium | Low | Very Low | |
Unseasoned: | J1 | J2 | J3 | J4 | J5 | J6 |
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Seasoned: | JD1 | JD2 | JD3 | JD4 | JD5 | JD6 |
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White, yellow, pale straw to light brown | Pink to pink brown | Light to dark red | Brown, chocolate, mottled or streaky | |
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Modulus of Rupture - Unseasoned: | 73 MPa |
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Modulus of Rupture - Seasoned: | 110 MPa |
Modulus of Elasticity - Unseasoned: | 12.4 GPa |
Modulus of Elasticity - Seasoned: | 16 GPa |
Maximum Crushing Strength - Unseasoned: | 36 MPa |
Maximum Crushing Strength - Seasoned: | 61 MPa |
Impact - Unseasoned: | |
Impact - Seasoned: | |
Toughness - Unseasoned: | |
Toughness - Seasoned: | |
Hardness - Unseasoned: | |
Hardness - Seasoned: | 10 |
Low | Moderate | Reasonably High | High | |
(0 - 5 yrs) | (5 - 15 yrs) | (15 - 25 yrs) | (more than 25 yrs) | |
In-Ground: | ![]() | |||
(0 - 7 yrs) | (7 - 15 yrs) | (15 - 40 yrs) | (More than 40 yrs) | |
Above ground: | ![]() | |||
(0 - 20 yrs, usually < 5) | (21 - 40 yrs) | (41 - 64 yrs) | (More than 60 yrs) | |
Marine Borer Resistance: |
Lyctid Borer Susceptibility: | Susceptible |
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Lyctid Borer Susceptibility - Other: | |
Termite Resistance: | Resistant |
Critical Radiance Flux - Lower: | >2.2 and <4.5 |
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Critical Radiance Flux - Higher: | ≥4.5 |
Smoke Development Rate: | <750 |
1 - non-combustible | 2 - reasonably non-combustible | 3 - slightly combustible | 4 - combustible | |
Fire Properties Group |
Average Specific Extinction Area: | <250 |
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Bushfire Resistance: | BAL 12.5 and 19 – All AS3959 required applications |