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Thermally Modified Timber

An Innovative and Exceptional Quality Timber Solution

Thermal modification of timber is an environmentally friendly process resulting in an exceptionally stable, highly durable, and aesthetically pleasing timber – all desirable properties for bespoke cladding profiles. 
Despite being proven in contemporary European homes and commercial buildings over many years, it is a relatively new process to New Zealand. It is now globally recognised as a low environmental impact method of preserving timber for use in outdoor environments. 

About Thermally Modified Timber
Thermal modification is conceptually a simple, chemical-free process. Suitable timbers are subjected to high temperatures using heat and steam in a controlled environment which permanently alters the cell structure to enhance the physical properties of the timber. The result of this is that the timber has a greatly reduced capacity to absorb moisture. With the reduction of moisture absorption, the timber is much less susceptible to cupping, expansion, contraction or distortion caused by seasonal changes in the environment.

The Key Properties of Thermally Modified Timber are: 
  • Enhanced durability and exceptional dimensional stability
  • Able to accept darker coatings with a significant reduction in dimensional movement
  • Low susceptibility to fungal decay
  • Consistent, aesthetically pleasing colour
  • Easily workable and easy to maintain

JSC TMT® Range
JSC has a selection of thermally modified timbers available. Ranging from interesting feature grades to clearer grades that have minimal natural rustic characteristics. Due to the thermally modified process that the timbers undergo, they all come in rich brown tones and are suitable for a variety of interior and exterior applications such as exterior claddings, interior linings, battens and more depending on the species you choose.

JSC actively work on bringing exciting new products to help you reshape the NZ landscape. Keep an eye out for new offerings. For more information on all the JSC TMT® options or a free sample please contact the JSC team who are always happy to assist.

Types of Applications Suitable for The JSC TMT® Range
  • Exterior Claddin- For cladding profiles take a look at our TMT profile chart for the range of standard profiles available for the JSC TMT® range. Please note custom profiles are available upon request.
  • Interior Lining - Interior profiles are available upon request, speak to the JSC team about the options
  • Battens/Timber Screens

JSC TMT® Options
TMT Taiga - Feature Grade Thermally Modified Range
Taiga is the JSC TMT feature grade offering. With a variety of offerings ranging from smaller, more scattered knots to more oval-shaped knots showing up at regular intervals that give cladding and interiors a unique personality.
TMT Taxon - Clearer Grade Thermally Modified Timber Range
Taxon is the clearer grade thermally modified timber offering from JSC. With minimal natural rustic characteristics making it a great choice for a range of applications such as external cladding, interior lining and other demanding applications.

Coatings
Like any natural timber, the thermally modified timbers will eventually weather to shades of grey when subjected to the environmental elements of temperature, moisture, and UV rays. Therefore, the use of a premium grade oil stain with a UV protectant is recommended to maintain the looks of the product. The JSC TMT® products take both oil and water-based coatings well.

JSC has a wide range of timber coatings and offers factory coatings, which leave your cladding with a premium finish, save time, and reduce site costs. Speak to the JSC team about the options available. 

 
Tags: Popular, Attractive, Stable, Thermally modified
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The thermal modification process takes suitable timbers and subjects them to high temperatures using heat and steam in a controlled environment without the use of any chemicals. The heat inside the thermal modification chamber is slowly raised to 212°C and the entire process can last up to 110 hours. Once the process is complete, the equilibrium moisture percentage of the modified product is around 4-7%.

The thermal modification process permanently alters the cell structure which enhances the physical properties of the timber. The result of this is that the timber has a greatly reduced capacity to absorb moisture. With the reduction of moisture absorption, the timber is much less susceptible to cupping, expansion, contraction or distortion caused by seasonal changes in the environment. The thermal modification process removes nutrients from the wood thereby eliminating the food source for insects and fungi making it particularly resistant to decay. Thermal modification is an environmentally friendly process resulting in an exceptionally stable, highly durable, and aesthetically pleasing timber – all desirable properties for bespoke cladding profiles.
 
Similar Timbers
Clear Grade TMT Taxon, Lunawood

Need a custom Thermally Modified Timber solution for your next project?

At JSC, we can make your timber design dreams come true. Our expert in-house manufacturing capabilities allow us to create offering to satisfy even the most unique project requirements. Our precision moulding and machining mean we can match existing profiles and also do custom design. The possibilities are endless. Get in touch today.

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