02/06/2026
Meet Ulin, or Ironwood, one of the densest and most durable timbers in the world.
Reclaimed from old buildings, bridges and wharves in Indonesia, Ulin is exceptionally hardwearing, with a Janka rating of 13.3–16.4kN. That makes it denser than many of Australia's renowned hardwoods, including Ironbark.
Its natural termite resistance and Class 1 durability make it an outstanding choice for decking and other outdoor applications, where it can withstand decades of exposure to the elements.
We currently have recycled Ulin decking available in generous 145mm-wide boards and long lengths up to 4 metres, creating cleaner layouts with fewer joins and a striking finished result.
Read more: https://www.thors.com.au/timber-species/ulin-ironwood-recycled-timber