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Charred timber cladding is an exterior timber façade system produced using the traditional Japanese Shou Sugi Ban technique. Also known as burnt Japanese wood or burnt wood cladding, this controlled surface charring process creates a carbonised outer layer that enhances weather resistance while delivering a distinctive black architectural finish.
The Shou Sugi Ban technique modifies the surface of selected timber species such as Siberian Larch and Nordic Spruce. The resulting charred cladding combines the structural properties of the base timber with a protective carbon layer that reduces surface moisture absorption and slows visible weathering. Performance remains dependent on the underlying species and correct rainscreen installation.
Exterior charred timber is widely specified across the UK for contemporary façades, extensions, garden rooms and feature elevations where black timber cladding is required as a strong architectural element. The finish may be supplied as deep char for pronounced texture, brushed char for a more refined surface, or sealed and stained systems for improved colour consistency and reduced surface rub-off.
When installed as part of a ventilated façade system with adequate cavity ventilation, breathable membrane protection and stainless steel fixings, charred timber cladding performs reliably in UK external conditions. Proper ground clearance and detailing remain critical to long-term durability.
Where reaction-to-fire performance forms part of the specification, charred timber can be supplied with fire-retardant treatment to achieve improved European reaction-to-fire classifications, subject to full wall build-up and regulatory approval.
We supply Shou Sugi Ban wood and charred timber cladding in a range of profiles and board dimensions suitable for residential and commercial architectural projects across the UK.
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Timber cladding performs best when designed as a ventilated rainscreen system rather than simply fixed directly to a wall. A drained and ventilated cavity helps manage moisture and improves long-term performance in UK weather conditions. Species choice then becomes a balance between dimensional stability, durability class and surface behaviour over time. ThermoWood cladding (Thermo Pine / Thermopine) is selected for enhanced stability and reduced movement. Siberian Larch cladding offers natural durability and strong grain character. Shou Sugi Ban wood (technique), often referred to as charred timber or burnt Japanese wood, provides a surface-stabilised architectural finish with distinct visual depth. Nordic Spruce cladding is a consistent softwood solution commonly specified for coated or treated façade systems. Where reaction-to-fire performance is part of the specification, review fire rated cladding options early, as Euroclass performance depends on the full wall build-up and treatment process. For broader façade detailing and installation context, see The Ultimate Guide to Timber Cladding in the UK.
| Feature | ThermoWood | Siberian Larch | Shou Sugi Ban (Charred Timber) | Nordic Spruce |
|---|---|---|---|---|
| Dimensional stability | High (thermally modified) | Moderate | High (surface-stabilised) | Moderate |
| Typical durability (EN 350) | Class 2–3 | Class 3 | Improved surface durability | Class 4–5 (untreated) |
| Moisture movement | Reduced | Medium | Reduced | Higher than modified timber |
| Fire treatment options | Available | Available | Available | Available |
| Typical applications | Modern façades, battens | Rainscreen, mixed-use builds | Feature elevations, architectural façades | Coated façade systems |
ThermoWood cladding is thermally modified to reduce moisture movement and improve dimensional stability. Siberian Larch cladding relies on its natural durability and dense grain structure. ThermoWood typically offers lower movement risk, while Larch provides a more pronounced natural character.
Shou Sugi Ban wood, also known as charred timber or burnt Japanese wood, forms a carbonised surface layer. Depending on the finish level (brushed, sealed or stained), periodic inspection is recommended. Sealed systems require maintenance similar to other coated cladding systems.
Timber cladding can be supplied with fire-retardant treatment to achieve improved European reaction-to-fire classifications. The final Euroclass rating depends on the species, treatment process and complete wall build-up. Always confirm the required classification with building control before specification.
Service life depends on species, detailing and exposure. Thermally modified timber and naturally durable species such as Siberian Larch typically provide long above-ground service life when installed as a ventilated rainscreen system with correct ground clearance.
Yes. All exterior timber, including ThermoWood, Larch and Nordic Spruce, will gradually weather to a silver-grey tone if left untreated. This colour change does not reduce structural performance and can be managed with UV-protective coatings if colour retention is required.