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Circular façade cladding: Shou Sugi Ban wood
In an era where sustainability and circularity are becoming increasingly important in the construction and design sectors, circular façade cladding is emerging as an innovative way to combine aesthetics with environmental responsibility. One of the most striking techniques applicable in this context is Shou Sugi Ban, an ancient Japanese method of wood preservation through charring, which creates a distinctive black carbon layer. This technique is not only visually compelling but also offers numerous sustainability benefits, making it an excellent choice for circular façade cladding.
Is a lot of gas consumed while charring wood?
During the charring of the top layer, the gases released are collected in the oven. At another point in the process, oxygen is added to these gases, causing them to ignite. This provides the heat needed for charring the wood.
Gas is only added at start-up, after that the wood burns almost entirely on the gases released during the process.
How long does the wood last?
The service life of the wood depends on the durability class of the wood species and the detailing of the building. Our wood species have a durability class 1, 2 or 3.
Durability class 1: 25 years and more
Durability class 2: 15 to 25 years
Durability class 3: 10 to 15 years
The carbon layer of the burnt wood weathers outdoors in the long run under the influence of wind, rain and hail. The lifespan of the carbon layer depends on the orientation of the facade and the location of the building.
Please contact us for more information.
When used indoors, the wood lasts as long as untreated wood, i.e. many decades. Moreover, this wood is fixed, making it less vulnerable.
How do I maintain the wood?
Unfixed planks with a carbon layer require low maintenance.
Planks that have been burned and brushed have a stain or oil layer. This wood requires periodic maintenance every three to six years. If you do not maintain Kyushu / Nakatado / Sakaide / Shodoshima / Takamatsu exterior, the stain layer will eventually harden and flake. Below this, the white wood will emerge and ‘age’.
The product specification sheet that you will find on each product page explains exactly if and what maintenance the different products need.
Do you supply FSC-certified wood?
All the wood we buy is FSC-certified.
Circular façade cladding
Circular façade cladding focuses on using materials that are reusable, recyclable, or biodegradable. The idea is to design buildings using materials that can be re-employed at the end of their lifecycle, thereby minimizing waste and reducing the need for virgin resources. Shou Sugi Ban fits perfectly within this concept, as it can be produced from sustainably sourced wood, and the charring process significantly extends the material’s lifespan—contributing directly to the circular economy.
Benefits of Shou Sugi Ban wood for circular façade cladding
Durability and long lifespan:
The charring process creates a hard, pure carbon layer that is firmly bonded to the underlying wood. Authentic Shou Sugi Ban planks produced in the ovens of Zwarthout | Shou Sugi Ban are deep black and remain that way, thanks to a UV-resistant, fire-retardant surface that also protects against insects and fungi. This makes Shou Sugi Ban extremely suitable for long-lasting façade cladding.
Low maintenance:
Wood treated using the Shou Sugi Ban method requires minimal upkeep. Unlike untreated wood, the charred finish is highly resistant to rain, sunlight, and mold, maintaining its quality over time.
Visual and aesthetic appeal:
Shou Sugi Ban wood provides façades with a unique, deep-black appearance that only grows more beautiful with age. The natural craquelure (crackled texture) of the charred surface creates a timeless aesthetic.
Reusability:
Within a circular construction approach, Shou Sugi Ban wood can be reprocessed or recycled after its initial use. The wood often remains in excellent condition, allowing it to be repurposed for other applications.
Example of circular façade cladding with Shou Sugi Ban wood
Since 2012, Zwarthout | Shou Sugi Ban has completed hundreds of unique projects using exclusive, black-charred wood—both for sustainable façades and interiors. Collaborating with leading architects, contractors, developers, and passionate private clients.
FAQ
Latest reviews
The “Paradox.” Burning wood to protect it.
It sounds contradictory — but it’s brilliant.
At ORGA, we’re big fans of biobased materials that truly prove their worth. Take our collaboration with Zwarthout | Shou Sugi Ban, for example. By charring wood using the centuries-old Shou Sugi Ban technique, a natural protective layer is created — without the need for paint or chemicals.
The result is a façade with character, built to last for generations. In the three recent projects, we’ve seen how it creates a robust, timeless appearance, while simultaneously contributing to refined, high-quality architecture.
Less maintenance, and a building that only becomes more beautiful with age.
That, to us, is what truly future-proof design looks like.
“We recently replaced the potted decked timber on our farmhouse in the Beemster region with Shodoshima semi-gloss from Zwarthout l Shou Sugi Ban. With special planks 25 cm wide, it looks great on a farmhouse. A very beautiful product and great service from Zwarthout l Shou Sugi Ban!”
”We chose Yoroi for several reasons. First of all, we like the Japanese classical technique used for burning the bamboo. Due to the burning technique Shou Sugi Ban, Yoroi has a fire class B and is maintenance-free. Finally, the black charred bamboo is a regrowable material and aesthetically matches our design perfectly.”
”As a gardener, it is an honour to work with such beautiful traditional products.
The delivery times are also great and you get friendly service.”
