Koninklijke Houthandel G. Wijma & Zonen B.V.


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The colour of Merbau is yellow to orange-brown, discolouring to brown to dark brown or dark red-brown. Sometimes black patches also occur in the wood. The differences in colour are characteristic of this type of wood. The yellow-white 20-80 mm (average 40-50 mm) thick sapwood is markedly different from the heartwood. When the wood is exposed to light, these large differences in colour disappear. Lighter colours become darker, darker patches in contrast tend to become lighter.

Properties of this timber species


  • Botanical name: Intsia bijuga / Intsia palembanica and Intsia spec. div.
  • ATIBT name: Merbau

 Quality requirements

  • Merbau is included in the list of approved timber species for application in wooden façade elements (SKH-Publication 99-05). This means that frames with a KOMO® product certificate can be manufactured with Merbau
  • For Merbau, a Dutch standard appeared in 1989 in the series Quality Requirements for Timber (KVH 1988); NEN 5481 'Houtsoort Merbau'
  • Merbau meets the requirements specified in the BRL 2908 'Wooden dowels'

 Strength class

  • Merbau quality class HS/BS 5756 is classed in Strength Class D50 (NEN-EN 338)


  • Use as construction timber for indoor and outdoor work, door and window frames, doors, stair treads, (parquet) floors
  • Likewise for hydraulic engineering uses on piles, as a component for lock gates, bridge and jetty decks
  • In the areas of origin Merbau is also used for furniture, turned goods and cutting


  • Resistance to fungi: class 1-2 (very durable - durable). The natural constituents produced by Merbau, which make it durable, are leachable in water. Merbau is therefore less durable in constant damp conditions in water and/or with ground contact or in poorly ventilated rooms.


(500)-730-800-830-(1000) kg/m3 at 12% moisture content

source: Houtvademecum © 2010 Centrum Hout Almere, 10e herziene druk

sawn timber
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