A timber delivering both beauty and brawn

Cumaru is an exceptionally dense, hard timber with a natural resistance to fungi and insects, making it an ideal solution for bespoke commercial projects and high-exposure interior and exterior applications. JSC Cumaru, also known as Tonka, is FSC® certified timber, extremely resilient and durable, with a beautiful grain detail and finish.

Due to its strength and density with the right tools and methods, a clean, smooth finish can be achieved. Cumaru also glues, finishes, and stains well.

  • Category
    Beams & Columns, Timber Decking, Timber Flooring
Scope of use

Cumaru Applications

When working with Cumaru care is needed to avoid raised grain due to the use of dull knives, particularly in younger pieces. Old-growth generally finishes well and takes stain and glue well with really pleasing results. Cumaru timber is extremely stiff, strong, and hard which lends itself well to a variety of applications:

  • Heavy structural beams and posts
  • Flooring
  • Decking - industrial and commercial domestic
  • Bridge girders and decking

Key properties of Cumaru

  • Extremely dense and resilient timber
  • Suitable for high traffic/high exposure areas
  • Class 1 durability
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JSC's Enduring Commitment to Quality Craftmanship and Innovation

JSC has a proud and long-standing story within the landscape of New Zealand business and manufacturing.

Established in Dunedin in 1900 by Jack Scott, and named J Scott and Company, our pioneering business grew and diversified in line with customer demand, tastes, and trends over the years.

This reputation for excellence that was established over one hundred years ago endures to this day, as does the ability to adapt and evolve, to better serve the needs of customers and to solve the challenges facing the building industry and the environment.

Innovation To Build Tomorrow

JSC is New Zealand’s premium architectural and building solutions partner, proudly producing exceptional and innovative timber products, materials, and finishings that will stand strong today and into the future. As leaders in timber cladding, hardwood decking, interior panelling, timber coatings, thermally modified timbers, and more, JSC is committed to delivering innovation to build tomorrow.

Our passionate and experienced team are dedicated to delivering quality and excellence at every step of the build journey. With a diverse range of technical expertise and capabilities, our collaborative national team is here to ensure the very best outcome for every project. Our commitment to you, is building a future together with innovation, reliability, and partnership.

  • Commitment to high-quality, clear information is our foundation. We prioritise responsiveness to ensure efficient communication and smooth projects.
  • We have the in-house expertise to innovate, educate, and lead the building industry to entirely new possibilities - in the consultation, building process, and the final outcome.
  • JSC is more than a supplier. We become an extension of your team, committed to the project, process, people, and delivery excellence.
  • We prioritise responsiveness as a key element of our partnership, whenever you have questions or require information through RFI's, you can rely on us for prompt and efficient responses.
  • With a rich history spanning over 120 years in New Zealand, JSC has cultivated a reputation as a reliable and trusted partner. Our commitment to quality has stood the test of time, shaping a legacy that speaks for itself
  • Positive sustainable practices and environmental responsibility are fundamental to both the values and the operations of JSC. We are committed to creating a positive and practical impact for future generations, through our work, our products, and our technical innovation.

Please contact us for further information. We look forward to doing business with you.