Charred timber cladding is a traditional wood charring process used in Japan. It is also commonly known as the Shou sugi ban. This method produces a weathered, burnt-wood appearance on the wooden plank’s exterior by torching the planks from the outside. This results in a lovely, burned appearance on the wood cladding, which has other advantages apart from sheer aesthetics.
Read on, and we will go through how charred timber cladding is made, its benefits, and how long it will last.
How Is It Made?
Charred timber cladding is an old Japanese method for charring wood. The ultimate result of this wood burning is an aesthetically pleasing timber that may vary from a subtle grey hue to a strong black based on various elements and your choice. This wood colouring process involves putting flames on timber boards and letting them burn outside the wood.
Charred Timber Cladding Benefits
Charred timber cladding offers excellent benefits that assure the beautiful wood variety’s endurance and attractiveness. Aside from its aesthetic value, charred wood is widely recognised for its durability. Its benefits include:
Enhances the Fire Resistance
Contrary to expectations, the technique of charring wood strengthens its resistance to fire. The regulated procedure eliminates the fragile outer cells that burn quickly. The tough lignin cells are exposed, which need a much greater temperature to ignite. This implies that burned wood has a different thermodynamic conductivity than untreated wood.
Has Aesthetic Appeal
Charred wood’s complete look is lovely and can make quite an impression! Using various proven and tested timbers and altering the brushing and finishing procedure adds variety.
Moreover, for a traditional appearance, charred cedar timbers may be left with a crackling surface, softly brushed to achieve a smooth finish, or extensively brushed to define the grain.
Biological factors such as fungus, mould, and insects may also cause degradation.
We’ve all seen wood burrowing beetle-caused holes in wooden beams or decaying wooden window frames. Coatings might be applied to lessen the possibility of infestation. These are not required on charred timber cladding because the carbon outer layer deters insects.
On the other hand, fungus and mould need highly particular moisture and oxygen conditions to flourish. Techniques such as kiln drying lumber, protective coatings, and charring reduce the risk of these conditions.
Another unexpected advantage is that charring timber increases its strength. Removing an exterior layer to strengthen the wood while drawing moisture out is strange. As a consequence, the final product is stronger.
Timber is organic, usually sturdy, and long-lasting but also hygroscopic. This implies it contracts and expands in response to changes in humidity. It rots, warps, and cracks when exposed to seasonal change.
An outer barrier is created by applying paints, varnishes, oils, and other protective coatings. This contributes to the preservation of the timber. There are highly effective solutions on the market, but they must be sprayed frequently to keep weatherproofing.
In Japan, the wood is charred. Controlled wood burning extracts natural resins and leaves a carbon coating on the top. This weatherproofing solution is long-lasting because it is built into the wood rather than applied as an afterthought.
It Comes In Various Textures
Although charring timber might have seemed easy, various procedures for achieving Shou Sugi Ban exist. Some patterns need a little amount of wood burning to get a diversity of colours within a single piece. It is critical to understand that not all products are created the same, just as not all wood burns in the same manner.
Additionally, certain wood species with a weaker grain pattern may seem bland after burning due to the dominance of black char. Woods are more appealing because of their grainier, bolder appearance after burning.
Suits For Exteriors
The charred timber cladding process is environmentally friendly and does not contribute to pollution. This siding includes no chemicals that might leach into the surroundings and is thus suitable for homes with kids.
The burning process left a thin layer of carbon on the wood’s surface, which we call charred wood. This carbon coating protects the interior of wood in the same way as sealants do.
How Long Does Charred Timber Cladding Last?
The wood material you choose for the next task will define how long the Shou sugi ban may last. Others work primarily with spotted gum cladding, a durable and easy-to-operate-with timber.
Furthermore, the location of the charred wood, whether it is sun-facing, weather patterns (how frequently it rains), and the efficiency of the installation are all factors that will affect its longevity. It is a strong wood that needs minimal maintenance, but with appropriate care, the charred timber cladding might survive for decades, perhaps even 50 years!
Charred timber cladding has been used to stunning effect in old and modern structures. We’ve noticed an increase in demand for exterior and interior applications, but this isn’t just a fad. The historic process yields a long-lasting, attractive building material. It looks great and protects the timber.