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Fire resistance of fired Shou Sugi Ban boards in practice.

The idea of ​​fire-fired wood was born in Japan and is still based on the traditional Japanese method of wood preservation and refinement using Shou Sugi Ban 焼 き 杉 Yakisugi, known for 700 years. Nowadays, the choice of fired boards for facades is rather decorative and the main emphasis is placed on the visual aspects, because it is difficult to pass by facades made of fired boards. The growing popularity of the Shou Sugi Ban technique in Western countries means that the Japanese technique of impregnating wood is experiencing its renaissance.

At the same time, little attention will be paid to the excellent technical properties of wood burning. In the past, when using the Shou Sugi Ban method, little attention was paid to decorative aspects, and the main reason for using this method was increased resistance to external factors. Burning the wood surface causes closing of the internal cells, which seals the surface, and additionally makes the wood resistant to fungi, mold or rot. The most important issue, however, is the increased resistance to wood ignition. In other words, wood that has been burned once, on the surface of which a charred layer has formed, is much more difficult to fire again.

Paradoxically, it turned out that fire consumes burned wood much slower. In fact, it is harder to get an open flame when trying to fire, and the wood smolders more than it burns. Of course, this significantly slows down the combustion process and gives you more time to react appropriately. Currently, a lot of attention is paid to fire protection, the current construction also looks completely different, and most of the raw materials and building materials are produced in a way that reduces the risk of fire. Nevertheless, the technical properties of the fired wood remain timeless, and the use of Shou Sugi Ban boards makes a special contribution to the increased fire resistance of the entire building.

In light of the applicable regulations, it is also important that the buildings meet the fire resistance requirements set out in the NRO standard. In the case of fired boards, this is possible thanks to the use of special measures for securing the boards at the final stage of production. The substances used meet the EN 13501-1 standard (fire classification) in combination with flame-retardant bearing plates, substructure, metal grate, the standard comes down to: B-s2, d0. At the same time, the use of this type of measures when securing the wood provides even greater resistance to external factors and ensures that the surface of the board does not get dirty.

Boards fired with traditional Japanese techniques and additionally secured with modern methods become very resistant to external factors, including fire, and maintain their appearance for several years, without the need for additional intervention or repeated security treatments.