When people ask “how much is timber cladding per m² in the UK?”, they usually mean the board price. In practice, the real cost is a stack of smaller decisions: profile, thickness, fixing method, site exposure, finish level, and how often you plan to maintain it. This guide compares three of the most common “upgrade” options used on UK residential and light commercial projects—ThermoWood, Siberian larch, and charred cladding—through the lens that actually matters: lifetime value. If two claddings differ by £15–£25 per m² on day one, but one needs earlier re-coating (or is more likely to move, check, or stain), the cheapest board often becomes the expensive façade.
Below you’ll find realistic UK cost bands, what pushes the price up or down, and how to think about lifespan, maintenance cycles and replacement risk—so you can specify with fewer surprises.
Quick answer (for pricing + value)
- Lowest upfront cost: Siberian larch (typically lower £/m² than ThermoWood and many charred finishes).
- Best stability / lower movement risk: ThermoWood (thermal modification reduces moisture uptake, often improving dimensional stability).
- Best “ready-finished” aesthetic: Charred cladding (often supplied brushed/oiled, but maintenance depends on finish type).
- Best value depends on exposure + maintenance plan: sheltered elevations can favour larch; high exposure often favours ThermoWood or a robust charred system.
- Most common hidden cost: maintenance labour (access, scaffold, and re-coating cycles) rather than boards.
1) UK timber cladding costs per m²: realistic bands (materials)
It’s helpful to separate board cost from system cost. Most online comparisons mix them. Board cost is your cladding boards only; system cost includes battens, membranes, fixings, trims, coatings and (on many sites) scaffold. The bands below are for the cladding material itself, because that’s what typically changes most between ThermoWood, larch and charred options.
For wider context on UK cladding price drivers (profiles, thickness, grades, and how merchants quote), see this reference guide: timber cladding cost per m² in the UK.
| Type | Typical board cost (UK, per m²) | What usually pushes price up | Where it usually wins |
|---|---|---|---|
| ThermoWood | ~£60–£95 | wider boards, premium profiles, longer lengths, factory-finished coatings | stability, lower movement risk, consistent colour base |
| Siberian larch | ~£45–£75 | clear/prime grades, tight tolerances, longer lengths, pre-finished systems | strong value, classic timber look, good durability when detailed properly |
| Charred cladding (Shou Sugi Ban style) | ~£75–£140+ | brushed textures, oil systems, controlled charring, wide boards, bespoke finishes | high-end façade finish, colour depth, “delivered finished” appearance |
These ranges overlap because “ThermoWood” isn’t one product, and “charred cladding” can mean anything from a traditional deep char to a modern controlled, brushed and oiled finish. If you’re comparing quotes, make sure the profiles and thicknesses are comparable—otherwise you end up comparing apples to an apple-shaped chair.
2) The cost drivers that change your £/m² more than the timber species
People fixate on species, but on UK projects the following variables often swing cost more than “ThermoWood vs larch” alone:
| Driver | Why it changes price | What to check on quotes |
|---|---|---|
| Profile & coverage | Different overlaps and shadow gaps change effective coverage per board. | Is the supplier quoting coverage m² or face m²? |
| Thickness | Thicker boards cost more and can tolerate more movement, but add weight. | Confirm nominal vs finished thickness, and fixing spec. |
| Finish system | Factory finishes and oil systems add cost but can reduce early maintenance. | Is it supplied raw, primed, single-coat, or full system? |
| Grade / character | Clear grades cost more; character grades cost less but show knots/variation. | Ask what appearance variation is acceptable on site. |
| Lengths | Long lengths reduce joints but increase price and transport constraints. | Check max length availability and wastage allowances. |
If you want a cleaner façade with fewer joints, you often pay for longer lengths, better grading, and stricter selection. That can make a “cheaper species” quote climb until it sits beside the “premium species” quote anyway—just with different risk and maintenance characteristics.
3) ThermoWood: higher upfront, often better stability and predictable performance
ThermoWood is thermally modified timber. In practical terms, the process reduces the timber’s tendency to absorb moisture, which can improve dimensional stability. On UK elevations exposed to driving rain and repeated wet/dry cycling, stability has a direct cost implication: fewer call-backs for cupping, movement lines, or fixing-related issues.
The “lifetime value” case for ThermoWood usually shows up when: access is expensive (scaffold), the building is exposed (coastal, open sites), or appearance consistency matters (architectural façades where patchy weathering is not acceptable).
If you’re comparing options side-by-side, review the ThermoWood range here: ThermoWood cladding.
Maintenance still matters. ThermoWood will weather to a silver-grey if left untreated, and coatings are mostly about controlling colour rather than “saving the timber.” That’s a key distinction: you might coat for aesthetics, not because the timber is failing. This is where many lifetime comparisons go wrong—they assume every re-coat is “necessary.” Sometimes it’s just a colour decision.
4) Siberian larch: strong value, but detailing and exposure decide the real cost
Siberian larch is popular in the UK because it sits in a sensible middle ground: good natural durability characteristics, a familiar aesthetic, and pricing that often undercuts ThermoWood and charred systems. When it’s detailed properly—ventilated cavity, correct fixings, clear ground clearance, and sensible end grain protection—it can perform very well.
The larch “cost trap” is that many people buy larch for value and then under-spec the rest of the system. If the façade is high exposure, if the design includes awkward water traps, or if there’s minimal ventilation, you can shorten the service life and increase staining risk. That’s not a larch problem; it’s a system problem that larch is less forgiving of.
For current larch category options, see: Siberian larch cladding.
If you want larch to stay more uniform in colour, you’ll likely be in a coating cycle (especially on sunny elevations). If you’re comfortable with natural weathering, larch can be a very cost-effective way to achieve a timber façade—just accept that “natural” includes variation.
5) Charred cladding: premium finish, but the maintenance story depends on the system
“Charred timber cladding” is often used as shorthand for Shou Sugi Ban-inspired finishes. In reality, there’s a wide spectrum. Some systems are deeply charred and then stabilised; others are more controlled, brushed, and finished with oils or stains to achieve a consistent tone. The good news is that charred systems can arrive looking finished—less on-site finishing, fewer early colour surprises. The trade-off is usually higher upfront cost, and a finish-maintenance plan that needs to be understood before it’s on the wall.
If your priority is a dark façade that stays dark, it’s not enough to say “charred.” You’ll want to know what the surface system is (char depth, brushing level, oil type) and what “refresh” looks like on your elevation. Some owners are happy with a softer, evolving patina. Others want a stable colour for years. Those are different specs.
Explore the category here: Shou Sugi Ban cladding.
One practical point: charred systems can be excellent at hiding minor dirt and weathering at a distance, but touch-up expectations should be realistic. If a façade is likely to be scuffed (bin stores, public access routes), plan for the fact that a “perfectly uniform black wall” can be harder to preserve than a naturally weathering timber.
6) Lifetime value: how to compare total cost over 20–30 years
A sensible way to compare lifetime value is to run a simple “ownership model” rather than guessing. You don’t need perfect numbers—just consistent assumptions. The table below gives a framework you can adapt.
| Factor | ThermoWood | Siberian larch | Charred cladding |
|---|---|---|---|
| Upfront board cost | Medium–High | Low–Medium | High |
| Stability / movement risk | Often strong (system dependent) | Good, more exposure-sensitive | Varies by base timber + finish |
| Finish maintenance | Often aesthetic-driven | Often aesthetic-driven (more variable) | System-driven (oil/finish refresh) |
| Best use case | exposed elevations, modern façades | value builds, mixed elevations, natural weathering | feature façades, design-led projects |
In many UK projects, the biggest lifetime cost isn’t timber at all—it’s access. If a re-coat requires scaffold, your “cheap boards” decision can be wiped out by one or two maintenance cycles. That’s why lifetime value tends to favour systems that reduce risk and uncertainty, not just the lowest initial £/m².
7) Lead times, delivery, and what to confirm before you order
Lead time is part of cost. If the project stalls because a profile isn’t available in your required length, the disruption can dwarf the cladding price difference. Before you commit, confirm: availability by length, batch consistency (especially for feature façades), and whether the boards are supplied raw or finished.
For practical ordering and delivery expectations (including payment and logistics), use: order, payment and delivery.
If your façade has multiple elevations, a sensible tactic is to allocate premium material where it matters most: high exposure, high visibility, or areas where maintenance access is awkward. You can often balance budget and performance without forcing the entire building into the most expensive finish.
FAQs: ThermoWood vs Larch vs Charred cladding costs and value
1) Is ThermoWood always more expensive than Siberian larch?
Often, yes on board cost per m², but not always on total installed cost. If the ThermoWood option is a profile with better coverage (or you reduce wastage due to longer lengths and straighter selection), the gap can shrink. More importantly, if you’re paying for scaffold and access, stability and reduced movement risk can improve lifetime value even when upfront cost is higher.
2) Which option lasts the longest in UK weather?
Lifespan is mostly a system question: ventilation, detailing, ground clearance, and fixing method. In general terms, well-detailed ThermoWood and well-detailed larch can both perform strongly. Charred systems can also be long-lasting, but durability depends on the base timber and the finish system. If you have severe exposure (coastal/windy), prioritise robust detailing and moisture control over the “name” of the timber.
3) Does charred cladding need less maintenance?
It depends what you mean by “maintenance.” A charred finish can mask visual weathering well, so it may look “fine” longer. But many charred systems use oils or surface treatments that still need periodic refreshing to maintain colour and surface consistency—especially on sunny elevations. If you want a stable black tone for years, clarify the maintenance cycle at the point of specification.
4) What’s the biggest hidden cost with timber cladding?
Access and labour. The boards might be £50–£100 per m², but a maintenance cycle that requires scaffold can cost more than the difference between larch and ThermoWood across the whole façade. The second hidden cost is wastage: complex elevations, lots of openings, and tight length constraints can drive wastage beyond what people assume.
5) Do I need to coat ThermoWood or larch?
You don’t have to, but you may want to. If you’re happy with natural silvering, leaving timber untreated is a valid choice (when detailed correctly). Coatings are usually used to control colour, reduce patchiness, or match a design brief. Decide first whether your priority is “timber performance” or “appearance control,” because that changes the cost model.
6) Which cladding is best for a modern, clean-lined façade?
ThermoWood is often chosen for modern façades because of its stability and consistent base appearance, which helps keep lines clean over time. Charred cladding can also look highly architectural, especially on feature elevations, but it’s typically a higher cost specification. Larch can work well too, but it tends to show more natural variation and can look more “timber-forward.”
7) Can I mix materials across elevations to control cost?
Yes, and it’s often the smartest approach. Put the premium system where it’s most exposed or visible, and use a value-driven system on sheltered elevations. Just keep profiles and detailing compatible so the façade still reads as intentional. Mixing can also help manage lead times and availability, especially where long lengths are limited.
8) How should I compare quotes fairly?
Confirm whether the quote is based on coverage m², whether the profile overlap reduces effective coverage, what grade is included, and whether finishing is included (raw vs factory-finished). Then compare the system: battens, membranes, fixings, trims, and any recommended coating system. If two quotes look far apart, it’s usually because they are not quoting the same specification.
9) Is charred cladding always “Shou Sugi Ban”?
Not necessarily. In the UK market, “Shou Sugi Ban” is often used to describe a family of charred or yakisugi-inspired finishes. The actual specification may be controlled charring, brushed textures, stained/painted finishes, or oil systems that emulate the look. If the name matters for your design brief, confirm the process and the finish system rather than relying on the label.
10) What should I prioritise if I want the best lifetime value?
Prioritise correct rainscreen detailing (ventilation and drainage), stable fixing methods, and an honest maintenance plan. Then choose the timber that fits your exposure and appearance goals. If access is expensive, choose the option that reduces uncertainty and call-back risk. If access is easy and you like natural weathering, larch can be strong value. If you want a finished, design-led façade, a charred system can justify its cost when specified with clear maintenance expectations.
Choosing the right option (simple decision logic)
If you want a quick way to decide, use this:
- High exposure + expensive access: lean toward ThermoWood (or a robust charred system) to reduce risk.
- Mixed exposure + value focus: larch often makes sense, especially if you accept natural variation.
- Feature façade + dark architectural finish: charred cladding can deliver “finished” appearance, but confirm maintenance cycles.
If you’re still comparing options across your elevations, you can browse the full category range here: shop all cladding.