Ulin or Ironwood, is a native Indonesian hardwood renowned for its incredible density, durability and termite resistance. Ulin is particularly well suited to decking, where its strength and durability allow it to perform exceptionally well in harsh outdoor environments.

RECYCLED FROM Old walkways, bridges and wharves in Indonesia. Shipped to Thor’s Hammer by Wood be Good.

TIMBER KNOWLEDGE Ulin boasts an aesthetic appeal that enhances any space. Ulin has a red to reddish-brown colouration, darkening to a deep brown, grey or blackish patina over time. Ulin is classified as a Class 1 natural durability timber. This is the highest possible rating, indicating extreme durability and resistance to decay and pests including termites. It is called Ironwood because it is incredibly stable and hardwearing - see the Janka rating below.

We currently have Ulin decking boards in stock that measure a generous 145mm wide. The boards are also available in long lengths from 2.4 to 4 metres, with the majority over 3 metres long, helping create a cleaner layout with fewer joins and a striking finished result.

145x18mm boards would not be recommended in Australian Hardwoods because there would be too much potential for movement and cupping. However, Ulin is exceptionally stable, making this width possible. Indeed, the timber is being recycled from walkways and jetty decking* in Borneo where it was originally sawn at 150x20mm. After decades of use, only 1mm needs to be machined off on each face to get a clean dressed board again. When we re-machine old Australian hardwoods we typically remove 5-10mm off the faces to machine them flat, so the difference is pretty incredible.

Ulin: Eusideroxylon zwageri

USES Anything external, specifically decking. Can be used for outdoor cladding or furniture.

NATURAL DURABILITY [approximate rating for the expected life of untreated and unfinished timbers exposed to the weather]

In Ground: Class 1 (15-25+ years) Above Ground: Class 1 (50+ years)

HARDNESS 13.3kN to 16.4kN (Janka Scale). For comparison Australian Ironbark is 13-14kN

DRY WEIGHT 900-1200kg / cubic metre

*Currently being replaced with concrete surfaces which can be driven on by cars and trucks

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