- Deep charred cladding burns timber until a thick 2–3mm carbonised layer forms — creating the distinctive alligator-skin texture and deep matte black colour of authentic Shou Sugi Ban.
- Zero maintenance required throughout the 25–40 year service life — no oiling, staining, or treatment of any kind.
- Siberian larch is the best species for deep charring — its dense, resinous grain produces the most pronounced alligator-skin texture and holds the char layer exceptionally well.
- Deep charred differs fundamentally from brushed and stained — deeper char, bolder texture, zero maintenance vs lighter char, smoother finish, wider colour range.
- Material costs £90–£130 per m² — highest upfront cost of any timber cladding, but lowest whole-life cost due to zero ongoing maintenance.
Shou Sugi Ban deep charred cladding is the most visually bold and practically low-maintenance exterior timber cladding available in the UK. The deep charring process burns the timber surface until a thick carbonised layer forms, creating the alligator-skin texture and deep matte black finish that has made Shou Sugi Ban one of the defining materials of contemporary UK architecture. This guide focuses specifically on deep charred cladding — what makes it distinct from brushed and stained variants, why Siberian larch is the preferred species for deep charring, and what to expect in terms of performance, weathering, and whole-life cost.
Shou Sugi Ban deep charred cladding on a contemporary UK home — the deep black carbonised surface, bold alligator-skin texture, and zero maintenance requirement have made deep charred timber one of the most specified exterior materials for contemporary UK residential architecture.
We supply deep charred larch cladding from UK stock — our deep charred larch is produced using the Shou Sugi Ban inspired charring technique in Siberian larch, available with nationwide delivery in 14–21 days. Browse our full charred timber cladding range for all available profiles and finishes.
What Is Shou Sugi Ban Deep Charred Cladding?
Deep charred cladding close-up — the thick carbonised layer creates the characteristic alligator-skin texture that defines authentic deep charred Shou Sugi Ban. The depth and three-dimensional quality of the surface changes dramatically in different lighting conditions.
Deep charred Shou Sugi Ban burns the timber surface until a substantial carbonised layer — typically 2–3mm deep — forms across the entire face of each board. This is significantly deeper than the light char used in brushed and stained variants, where charring is applied only briefly before being brushed back to reveal the grain beneath. The thick char layer in deep charred cladding creates three things that distinguish it from any other finish: the pronounced alligator-skin surface texture driven by the cracking and contraction of the deep char layer; the deep, consistent matte black colour that reads as genuinely black rather than dark grey; and the maximum protection benefit of the carbonised layer, which makes deep charred the most durable and lowest-maintenance charred timber specification.
The Shou Sugi Ban technique takes its name from the traditional Japanese practice of charring sugi cedar for building preservation — yaki (burned) sugi (Japanese cedar) ban (board). The UK market has adopted the technique using domestically available species — primarily Siberian larch and Nordic spruce — with deep charring applied to achieve the authentic alligator-skin texture associated with the original Japanese method. Our products are described as Shou Sugi Ban inspired, respecting the cultural heritage of the original Japanese practice.
Deep Charred vs Brushed and Stained — The Key Differences
Charred timber texture — the alligator-skin surface of deep charred cladding is three-dimensional and changes character dramatically in different light conditions, creating a facade of genuine depth and visual complexity.
- 2–3mm carbonised layer
- Bold alligator-skin surface texture
- Deep matte black — consistent colour
- Zero maintenance throughout service life
- Maximum weather and UV protection
- 25–40 year service life
- Siberian larch preferred species
- £90–£130 per m²
- Light char, wire brushed back
- Smooth surface — grain visible
- Multiple colours — black, grey, larch, nut
- Re-oil every 3–5 years
- Lighter, more refined appearance
- 20–35 year service life with maintenance
- Both larch and spruce available
- £75–£110 per m²
Choose deep charred when maximum visual impact, the authentic alligator-skin texture, and genuinely zero maintenance are the priorities. It is the most architecturally bold specification and the most durable long-term. Choose brushed and stained when a more refined, controlled surface is wanted — or when a colour other than pure black is needed. For a full guide to all finish options see our complete charred timber cladding guide.
Deep Charred Cladding on UK Buildings
Deep charred vertical cladding on a contemporary UK home — the bold black surface creates a striking contrast against lighter materials and landscaping, while the vertical board orientation emphasises the height and proportions of the building.
Deep charred Shou Sugi Ban has become one of the defining exterior materials of contemporary UK residential architecture. Its combination of bold visual impact, zero maintenance, and long service life addresses three of the most common specification priorities simultaneously — making it compelling for architects, self-builders, and homeowners alike.
The most popular application on UK homes is deep charred larch in vertical board-on-board or shadow gap profile on contemporary extensions and new builds. The vertical emphasis of the boards, the deep texture of the char surface, and the contrast between the black cladding and lighter materials — stone, brick, white render, glazing — creates facades that are among the most visually distinctive in UK residential architecture. Deep charred cladding is also increasingly used on garden offices and outdoor saunas, where the zero maintenance requirement is particularly valued for occasional-use structures.
For specific applications in garden rooms and garden offices see our garden room cladding guide.
Deep Charred Larch — Available Profiles
Deep charred larch cladding boards — the consistent colour and texture across each board is the result of the controlled charring process applied uniformly to each face. Note the distinctive alligator-skin texture on the board face.
Deep charred larch is available in a range of profiles suited to different architectural applications. The most widely specified profile for deep charred cladding in the UK is the rainscreen batten — narrow vertical boards with open joints that allow the bold char texture to read across the full facade as a consistent three-dimensional surface. Board-on-board vertical installation using deep charred larch battens is also extremely popular — the overlapping boards create additional shadow depth that complements the textured char surface.
| Profile | Best for | Visual result | Cost per m² |
|---|---|---|---|
| Rainscreen batten | Contemporary facades, garden offices | Vertical open-joint — bold texture across full facade | £90–£115 |
| Board on board | Residential extensions, new builds | Overlapping vertical boards — maximum shadow depth | £100–£125 |
| Shadow gap | Contemporary residential, commercial | Recessed groove + char texture — refined + bold | £105–£130 |
| Feather edge | Rural, agricultural, traditional | Traditional lapped profile in bold black | £90–£110 |
Board on Board — The Most Popular Deep Charred Profile
Board-on-board deep charred cladding on a UK home — the overlapping vertical boards create strong shadow lines between each board that add further depth to the already three-dimensional char texture.
Board-on-board vertical installation is the most popular deep charred cladding profile for UK residential projects — and it is easy to understand why. The alternating wide and narrow vertical battens create shadow lines between each board that add a second layer of shadow depth to the already three-dimensional char surface. The result is a facade of exceptional visual complexity — the char texture catches and holds light at the board face, while the shadow between boards creates a rhythm of dark and darker that shifts throughout the day as the sun angle changes.
Board-on-board installation with deep charred larch also has a practical installation advantage — the overlapping boards eliminate the need for precise edge-to-edge fitting, making installation more forgiving than tongue-and-groove or shadow gap profiles. The deep charred surface is particularly well suited to this advantage, as minor variation in board spacing is invisible against the bold char texture.
How Deep Charred Cladding Weathers Over Time
Aged deep charred shadow gap cladding — over time the deep black surface gradually lightens to a rich dark charcoal grey as UV exposure weathers the outermost char layer. The alligator-skin texture remains and the cladding continues to perform without any maintenance.
Deep charred cladding weathers gradually over its service life as UV exposure affects the outermost surface of the char layer. This is a natural process that requires no intervention and does not affect the structural performance of the cladding. The deep black colour transitions slowly to a rich dark charcoal grey over several years — the rate depends on exposure, with south and west-facing elevations weathering faster than sheltered or north-facing walls.
Critically, unlike painted or stained finishes, the weathering of deep charred cladding does not involve peeling, flaking, or uneven colour loss. The char layer weathers consistently across the full facade, maintaining a uniform appearance throughout. The alligator-skin texture remains clearly defined throughout the weathering process — the three-dimensional quality of the surface is preserved even as the colour transitions from deep black to charcoal grey.
For those who prefer to maintain the original deep black colour, a compatible exterior oil can be applied every 5–8 years to slow the UV weathering process. However the majority of deep charred installations in the UK are left completely untreated — the weathered charcoal grey is considered by many architects and homeowners to be an even better long-term result than the original black. For a full comparison of deep charred vs painted timber finishes see our charred vs painted timber cladding guide.
Cost, Installation & Specification
Deep charred larch cladding costs approximately £90–£130 per m² for materials in the UK. This is the highest upfront material cost of any timber cladding species and finish — but it also has the lowest whole-life cost, since no maintenance expenditure is required at any point during the 25–40 year service life. Over a 30-year period, a typical 80m² house cladding in deep charred larch costs significantly less in total than a comparable area in painted render or treated softwood when maintenance and re-coating costs are factored in.
Installation requirements are the same as any exterior timber cladding — ventilated batten framework, minimum 25mm cavity, breather membrane, A4 stainless steel fixings, minimum 150mm ground clearance. Two specific details are important for deep charred installations:
- End grain sealing — any site cuts through the char layer expose raw timber. Apply matching charred timber end grain sealer or compatible exterior oil to every cut before fixing
- Stainless fixings essential — rust staining from standard steel fixings is particularly visible against the deep black surface. A4 stainless throughout, no exceptions
- Handle with gloves — deep charred boards transfer char residue during installation. Protect adjacent materials and surfaces during fitting
For full installation guidance see our timber cladding maintenance guide and our cladding fixings guide.
What is Shou Sugi Ban deep charred cladding?
Shou Sugi Ban deep charred cladding burns the timber surface until a thick 2–3mm carbonised layer forms, creating the distinctive alligator-skin texture and deep matte black colour. The carbonised layer improves resistance to moisture, UV, biological decay, and insects without chemical treatment, and requires zero ongoing maintenance throughout its 25–40 year service life.
How long does deep charred Shou Sugi Ban cladding last?
Deep charred Shou Sugi Ban cladding has a typical service life of 25–40 years in above-ground UK exterior applications when correctly installed with a ventilated cavity, minimum 150mm ground clearance, and stainless steel fixings. No preservative treatment is required at any point during this service life.
What is the difference between deep charred and brushed and stained Shou Sugi Ban?
Deep charred burns until a thick 2–3mm layer forms — bold alligator-skin texture, deep black, zero maintenance. Brushed and stained applies a lighter char then brushes it back — finer, smoother surface, wider colour range, but requires re-oiling every 3–5 years. Deep charred is more durable and lower maintenance.
What is the best timber species for deep charring?
Siberian larch is the best timber species for deep charring in the UK. Its dense, resinous grain produces the most pronounced alligator-skin texture and holds the char layer exceptionally well. The high natural resin content also means the underlying timber has natural Durability Class 3 decay resistance beneath the char layer.
Does deep charred cladding need maintenance?
No — deep charred cladding requires no ongoing maintenance whatsoever. No oiling, staining, painting, or treatment of any kind throughout the 25–40 year service life. Over time the deep black colour gradually lightens to charcoal grey but the cladding continues to perform and look considered throughout this process.
Deep Charred Larch Cladding — UK Stock, Nationwide Delivery
We supply deep charred Siberian larch cladding produced using the Shou Sugi Ban inspired charring technique — FSC and PEFC certified, available from UK stock with nationwide delivery in 14–21 days. Contact our team with your profile, dimensions, and postcode for a precise quote.
