Zwarthout I Shou Sugi Ban

Each plank stores CO2, and thus contributes to the reduction of CO2 in the atmosphere. The wood comes from sustainably managed forests. Almost all of the products are biobased and/or easily biodegradable. The charcoal layer offers natural protection, which means that no chemicals are needed to protect the wood.  Each board is unique with its own appearance and texture. 

For every tree that is used two new trees are planted. Planting the trees back is done locally as much as possible, near Leersum and internationally. 

Made of

  • Kazura is one of the charred products. It is made from FSC thermally modified Radiata Pine. This is a fast growing tree from New Zealand.
  • The Sakaide is charred  and then brushed. The wood species used is Douglas fir from the Netherlands.
  • After brushing, Sakaide is treated with Tung oil. This oil is extracted from the seeds of the Tung tree. The best natural oil there is. 

Production Process

  • It starts with growing a tree.
  • Then the Thermal modification of the wood by Abodo (Kazura) takes place, giving it a longer life.
  • Thereafter it is charred.
  • After use, the charred wood can be recycled by using it for energy generation or composting.


This can be used for wall cladding and interior wall coverings. Zwarthouts products have been applied in various locations around the world. 

Environmental impact

  • One m3 of wood stores 800 kg of C02. 
  • CO2 is released during the charring process. In the future, a heat exchanger will use the process heat to heat the farm where Zwarthout is located. In this way,  the CO2 consumption of the houses at this location will be reduced. 
  • All products are fully compostable. 
  • The Radiata Pine absorbs 20.6 tonnes of C02 per year per hectare. 

Good to know

  • The charred products are maintenance-free, only the brushed products such as Sakaide should be re-oiled every three to five years.
  • The products protect against insects, mould and moisture. 

Growth opportunities

Zwarthout l Shou Sugi Ban sees potential to clad tall buildings with charred wood.